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Corporate Office Properties Trust

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FY2006 Annual Report · Corporate Office Properties Trust
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Defining The COPT Way

Corporate Office Properties Trust   2006 Annual Report

Our

values

corporate information

Executive Officers
Randall M. Griffin
President and Chief Executive Officer

Karen M. Singer 
Senior Vice President, General Counsel and 
Secretary

Stephen E. Riffee 
Executive Vice President and Chief Financial 
Officer

Roger A. Waesche, Jr. 
Executive Vice President and Chief Operating 
Officer

Service Company Executive Officer
Dwight S. Taylor 
President, COPT Development & Construction 
Services, LLC

Executive Offices
Corporate Office Properties Trust
6711 Columbia Gateway Drive, Suite 300
Columbia, Maryland 21046
Telephone: (443) 285-5400
Facsimile: (443) 285-7650

&vision

Registrar and Transfer Agent
Shareholders with questions concerning stock 
certificates, account information, dividend 
payments or stock transfers should contact our 
transfer agent:
Wells Fargo Bank, N.A.
Shareholder Services
161 North Concord Exchange
South St. Paul, Minnesota 55075
Toll-free: (800) 468-9716
www.wellsfargo.com/shareownerservices

Pennsylvania Office
Corporate Office Properties Trust
40 Morris Avenue, Suite 220
Bryn Mawr, Pennsylvania 19010

board of trustees

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core purpose

Legal Counsel
Morgan, Lewis & Bockius
1701 Market Street
Philadelphia, Pennsylvania 19103

Independent Auditors
PricewaterhouseCoopers LLP
250 West Pratt Street, Suite 2100
Baltimore, Maryland 21201

Dividend Reinvestment Plan
Registered shareholders may reinvest dividends 
through the Company’s dividend reinvestment 
plan. For more information, please contact 
Wells Fargo Shareholder Services at  
(800) 468-9716.

Annual Meeting
The annual meeting of the shareholders will be 
held at 9:30 a.m. on Thursday, May 17, 2007, at 
the corporate headquarters of Corporate Office 
Properties Trust at 6711 Columbia Gateway 
Drive, Suite 300, Columbia, Maryland 21046.

Investor Relations
For help with questions about the Company,  
or for additional corporate information, please 
contact:
Mary Ellen Fowler
Vice President and Treasurer
Corporate Office Properties Trust
6711 Columbia Gateway Drive, Suite 300
Columbia, Maryland 21046
Telephone: (443) 285-5450
Facsimile: (443) 285-7640
Email: ir@copt.com

Shareholder Information
As of March 15, 2007, the Company had 
46,743,001 outstanding common shares owned by 
approximately 421 shareholders of record. This 
does not include the number of persons whose 
shares are held in nominee or “street name” 
accounts through brokers or clearing agencies.

Common and Preferred Shares
The common and preferred shares of Corporate 
Office Properties Trust are traded on the New 
York Stock Exchange. Common shares are 
traded under the symbol OFC, and preferred 
shares are traded under the symbols OFCPrG, 
OFCPrH and OFCPrJ.

Website
For additional information on the Company, 
visit our website at www.copt.com.

Forward-looking Information
This report contains forward-looking informa-
tion based upon the Company’s current best 
judgment and expectations. Actual results 
could vary from those presented herein. The 
risks and uncertainties associated with the 
forward-looking information include the 
strength of the commercial office real estate 
market in which the Company operates, com-
petitive market conditions, general economic 
growth, interest rates and capital market condi-
tions. For further information, please refer to 
the Company’s filings with the Securities and 
Exchange Commission.

Corporate Governance Certification
The Company submitted to the New York Stock 
Exchange in 2006 the Annual CEO Certification 
required by Section 303A.12 of the New York 
Stock Exchange corporate governance rules.

Sarbanes-Oxley Act Section 302 Certification
The Company filed with the Securities and 
Exchange Commission, as an exhibit to its 
Form 10-K for the year ended December 31, 
2006, the Sarbanes-Oxley Act Section 302  
certification regarding the quality of the 
Company’s public disclosure.

(left to right)
Jay H. Shidler, Chairman of the Board; Managing Partner, The Shidler Group
Steven D. Kesler, Chief Financial Officer, Chesapeake Commercial Properties, Inc.
Kenneth D. Wethe, Principal, Wethe & Associates
Randall M. Griffin, President and Chief Executive Officer, Corporate Office  
Properties Trust

(left to right)
Clay W. Hamlin, III, Vice Chairman of the Board
Kenneth S. Sweet, Jr., Managing Partner, Gordon Stuart Associates
Thomas F. Brady, Executive Vice President, Corporate Strategy and Retail 
Competitive Supply, Constellation Energy Group
Robert L. Denton, Managing Partner, The Shidler Group

 
 
 
 
 
 
 
A REIT WITH A MISSION: THE COPT WAY

Since  1998,  Corporate  Office  Properties  Trust 
(COPT) has been a leader in shareholder return, 
dividend growth and tenant satisfaction.

During  2006,  in  the  midst  of  another  year  of 
strong  performance,  we  began  the  process  of 
ensuring  this  growth  and  success  would  con-
tinue. We asked ourselves the following:

What kind of corporate culture made this growth 
possible?  What  are  the  values  that  led  us  here? 
What is our core purpose? And where will it take 
us from here?

The  answers  identified  “The  COPT  Way”  as  a 
means for sustaining our track record and con-

tinuing to improve our performance.&

1

OUR CULTURE, CORE VALUES & VISION 

The COPT Way begins with a corporate culture that is committed to caring, 
trust  and  respect  for  all.  A  culture  that  encourages  both  individual  and  
professional growth. A culture that is guided by five core values:

Integrity: delivering and expecting the highest ethical conduct.

Service: exceeding expectations by paying attention to details.

Innovation: identifying and seizing opportunities through creative solutions.

Teamwork: supporting each other to enhance our collective strengths.

Excellence: passionately dedicated to being the best.      

integrity, service, innovation, 

By following these principles, we believe we will achieve our Vision 2025: To 
have The COPT Way be recognized as the standard of real estate excellence. 
Specifically, our goals are:

• To be ranked #1 or #2 in every meaningful industry evaluation.

• To be one of the top 50 places to work.

•  To  be  a  leading  contributor  in  improving  the  fabric  of  the  communities 

where we live and work.

If we strive to be the best at everything we do, financial success will take care 
of itself.

2

&teamwork              excellence

The Copt Way

3

our core purpose...

Providing the road map to reach our goals is a core purpose that is powerful, 
compelling and virtually limitless in scope.

“Creating Environments That Inspire Success” means building spaces that are 
strategically located, architecturally pleasing and unmistakably functional. It 
means adding art to the hardscape to inspire thought and motivate perfor-
mance. It means building green to benefit the environment. And, it means 
making our communities better places to live. Not just by adding attractive 
buildings,  but  by  improving  social  services,  educational  opportunities  and 
recreational amenities.

Ultimately,  it  means  doing  everything  we  can  to  help  our  tenants,  our 
employees and our communities succeed. For when they succeed, so do we.

By pursuing our core purpose, our leadership 
inspires others—our tenants, communities 
and employees—to improve, do their best 
and be successful.

Opposite  page  (left  to  right):  304  NBP,  a  LEED*  Silver-certified  building 
leased  to  Booz  Allen  Hamilton.  George  Swintz  (COPT)  and  Joe  Wysocki 
(Scitor) cut the ribbon on COPT’s first build-to-suit in Colorado Springs. An 
interior space in COPT’s new Columbia headquarters.

* Leadership in Energy & Environmental Design, a program of the U.S. Green  
Building Council.

4

creating

environments that 

inspire

success

5

2006 marked the seventh straight year that REITs outperformed other indi-
ces—ending the year up 33.5% versus the Dow Jones at 15.6%. And as usual, 
Corporate Office Properties Trust was among the leaders.

With a total shareholder return of 46%, we finished among the top six in this 
banner year for office REITs, outperforming the average office REIT by 38%. 
We  delivered  a  five-year  total  shareholder  return  of  426%,  second  highest 
among office REITs and fourth highest among all equity REITs. We signifi-
cantly  increased  our  enterprise  value  by  32% —from  $3.3  to  $4.3  billion. 
And we ended the year with the fourth highest multiple in the office sector 
and tenth highest among all 134 equity REITs.

We are also proud of our 2006 performance in a number of other areas:

We purchased a former army base, closing on 500 acres of the 591-acre 
Fort  Ritchie  United  States  Army  base  in  Cascade,  Maryland.  The  site  
contains  a  mix  of  office,  residential,  recreational  and  woodland  areas.  Our 
redevelopment plan, anticipated to cover a 10 to 15 year timeframe, includes 
1.7  million  square  feet  of  office  space,  and  will  be  a  significant  driver  of 
future earnings.

We strengthened our presence in Baltimore County and Columbia. 
We diligently pursued our largest company merger, closing in early 2007 on the 
Nottingham Properties office portfolio of 56 buildings containing 2.4 million 

a letter to our shareholders

square feet, 187 acres of land, and bringing 19 employees into the Company. 
This  makes  us  the  largest  office  owner  in  another  major  core  submarket, 
with future development capacity of a minimum of 2 million square feet.

We expanded our presence in Colorado Springs. We acquired six office 
buildings plus additional land, making us the largest owner of office proper-
ties in that market after entering it only one year ago. We now own 12 office 
buildings totaling 842,000 square feet, 94% of which are leased, and we have 
an additional four buildings under development totaling 292,000 square feet. 
We also own, directly or through joint ventures, sufficient entitled ground to 
build approximately 2.6 million square feet.

6

a letter to our shareholders

We positioned the company to double in size. With the acquisition of 
Fort Ritchie and Nottingham, we now have approximately 14 million square 
feet  of  entitled  land  development  capacity.  This  gives  us  the  potential  to 
nearly double our company size over the next 5–7 years, based on develop-
ment alone. We are strategically focused on adding to our presence in each of 
our core markets, and have done so at below market pricing.

We  moved  into  new  corporate  headquarters  and  strengthened  our 
senior management team, strategically positioning us for the future. We 
now have space to accommodate our expanding operations with a headquar-
ters that reflects the level of quality space we build for our tenants.

We launched The COPT Way, the culmination of a process to define our 
core purpose, core values and vision for our future. We strongly believe that 
a unified vision—for our employees, our tenants and our shareholders—will 
guide us to new levels of growth and success. That’s why we’ve made it the 
theme of this year’s annual report.

The  above  accomplishments  combine  to  position  the  company  for  annual 
double digit growth of FFO per share over the next several years, which is at the 
high end of the office sector. This growth is bolstered by our government and 
defense niche, which accounts for 54% of our revenues and continues to grow.

In 2006, COPT was again recognized nationally 
among all office owners as the winner of the CEL & 
Associates, Inc. award for quality service and tenant 
satisfaction for the large owner category as determined 
in a survey of tenants nationwide. This is our third 
year in a row as winner of this award.

I  would  like  to  personally  thank  the  Board  of  Trustees  for  their  guidance 
during 2006, our shareholders for their continued support, and our employ-
ees for their hard work and dedication throughout the year. We look forward 
to continued growth and excellence in 2007.

Sincerely yours,

Randall M. Griffin
President and Chief Executive Officer

7

Market Capitalization

TOTAL MARKET CAPITALIZATION
(in billions)

5

4

3

2

1

$5

4

3

2

1

0

0

0.8

0.4

1.6

1.2

1.20

0.80

$1.60

Dividend Growth

’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05 ’06

DIVIDEND GROWTH
(in dollars)

2006 results0
8 6

’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05 ’06

COPT

1,100%

0.40

660

880

440

1100

880

440

660

0.0

0

TOTAL SHAREHOLDER RETURN
(in percent)

220

0

220

0

1 Year

3 Years

5 Years

7 Years

9 Years

COPT

RMS

S&P

DOW JONES

Stock Chart

RMS

1100

880

660

440

220

0

S&P

1100

880

660

440

220

0

DOW JONES

1100

880

660

440

220

0

Market Capitalization

TOTAL MARKET CAPITALIZATION

(in billions)

Market Capitalization

Dividend Growth

TOTAL MARKET CAPITALIZATION

(in billions)

’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05 ’06

DIVIDEND GROWTH

(in dollars)

5

4

3

2

1

0

1.6

1.2

0.8

0.4

0.0

$5

4

3

2

1

0

$5

4

3

2

1

0

$1.60

1.20

0.80

0.40

0

’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05 ’06

’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05 ’06

Stock Chart

RMS

1100

880

660

440

220

0

S&P

1100

880

660

440

220

0

DOW JONES

Dividend Growth

COPT

DIVIDEND GROWTH
(in dollars)

TOTAL SHAREHOLDER RETURN
(in percent)

1100

1.6

1100

$1.60

1,100%

880

660

440

220

0

1.20

0.80

0.40

0

1,100%

880

660

440

220

0

COPT

RMS

S&P
DOW JONES

’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05 ’06

1 Year

3 Years

5 Years

7 Years

9 Years

TOTAL SHAREHOLDER RETURN
(in percent)

COPT

880

We are proud of our ability to generate strong financial growth and stability 
for our shareholders over our almost nine-year history as a NYSE public 
company and are focused on continuing this growth in the future.

660

440

220

0

1 Year

3 Years

RMS

S&P
DOW JONES

9 Years

7 Years

2006  WAS  ANOTHER  GREAT  YEAR  FOR  COPT  SHAREHOLDERS. 
5 Years
Our stock price hit an historic high of $50.47 at the end of 2006, increasing 
almost  $15  over  the  year.  Our  strong  performance  enabled  us  to  deliver  a 
total return to shareholders of 46% for 2006, 165% for the past three years 
and 426% over the past five years. For the tenth consecutive year, we increased 
our  dividend—providing  a  10.7%  annualized  increase  from  2005  for  our 
shareholders.  Our  total  market  capitalization  grew  from  $523.1  million  for 
year end 1998 to $4.3 billion for year end 2006, a remarkable increase.

9

5

4

3

2

1

0

880

660

440

220

1.2

0.8

0.4

0

0.0

1100

DOW JONES

880

660

440

220

0

660

880

220

440

1100

COPT

6

0

Stock Chart

RMS

1100

880

660

440

220

0

S&P

1100

880

660

440

220

0

10

living the COPT way

You will see The COPT Way when you visit our new corporate headquarters 
in Columbia, Maryland. In July, we moved into our new building in Columbia 
Gateway  office  park,  where  we  own  26  buildings  totaling  over  2  million 
square feet. We currently occupy two floors of the building, with the build-
ing  over  75%  leased.  The  space  reflects  our  quality  standards,  attention  to 
detail and appreciation for our team members. And, the interior space meets 
LEED Silver certification standards for green buildings. It’s an environment 
that truly inspires success.

Opposite page: 6711 Columbia Gateway Drive. Above (l to r): A “collaboration 
area” outside the COPT Café. Peg Ohrt, SVP, Human Resources; Dwight S. 
Taylor, President, COPT Development & Construction Services; and Connie 
Epperlein, Corporate Designer and Programmer, select finishes for the space. 
The COPT awards wall, off our main reception lobby.

11

ensuring the future

DURING  2006,  WE  STRENGTHENED  OUR  TEAM  to  ensure  a  successful  future.  Changes  included: 
the promotions of Roger A. Waesche, Jr., to EVP & COO, Karen M. Singer to SVP, General Counsel & Secretary, 
and Mary Ellen Fowler to VP & Treasurer, as well as the additions of Stephen E. Riffee as EVP & CFO (for-
merly CFO of CarrAmerica), Stephen B. Kutzer as CIO and Colleen M. Crews as VP & Controller.

Above (l to r): Rand Griffin, President and CEO; Roger Waesche; and Steve Riffee.

12

Steve Kutzer

Chief Information Officer

Mr. Kutzer is the  
first CIO at COPT. 
Formerly, he was SVP of  
Information Technology 
with CarrAmerica Realty 
Corporation and has held 
positions with KPMG 
Consulting and The World 
Health Organization.

Mary Ellen Fowler

Vice President and Treasurer

In her newly created  
position, Ms. Fowler is now 
responsible for cash man-
agement and capital mar-
kets in addition to her 
responsibilities for investor 
relations and marketing. 
She has been with COPT  
for five years, after 20 years 
of banking industry  
experience.

Colleen Crews

Vice President and 
Controller

A CPA, Ms. Crews brings  
15 years of real estate expe-
rience to COPT where she 
oversees all accounting 
department functions. 
Previous employers include 
The Town & Country Trust 
and Ernst & Young.

Karen Singer

Senior Vice President, 
General Counsel and 
Secretary

Ms. Singer, who was pro-
moted to SVP, manages our 
legal and internal audit 
departments. She is respon-
sible for all leases, contracts, 
financing documents and 
other legal instruments. She 
has been with COPT for  
ten years.

13

property       asset management

&

Baltimore, MD

MARYLAND

Potomac River

VIRGINIA

Washington, D.C. 

Each of our five core values is demonstrated by our property and asset 
management team in a number of key areas.

14

CUSTOMER SERVICE. For the third year in a row, COPT was recognized as 
the winner of the annual CEL & Associates, Inc. award for customer service 
among all office owners in the “large owner” category, based on the national 
survey of tenant satisfaction. Success in meeting our tenants’ needs every day 
is only possible with a team that is dedicated to excellence, attention to detail 
and service.

TENANT RELATIONSHIPS. The integrity and strength of our team are evi-
denced  by  our  expanding  tenant  relationships.  Despite  significant  earlier 
vacancies, we brought our Northern Virginia portfolio to 99% leased at year 
end. In Colorado Springs, where we entered the market only one year ago, we 
are  94%  leased  within  our  842,000  square  foot  portfolio  at  year  end.  And, 
our  customer  service  performance  continues  to  provide  new  opportunities 
such as the Northrop Grumman VITA contract in Virginia, that resulted in 
two buildings with anticipated construction costs totaling $86 million. Such 
teamwork is key to our success. That’s The COPT Way.

Opposite page (l to r): COPT’s market concentration is the Greater Washington, 
DC,  area.  Regional  Directors  include  Michael  A.  Riley,  Jeffrey  L.  Marquina 
and Gregory B. White. Members of the asset management/leasing team include 
VPs Derrick C. Boegner and William S. Barroll, and SVP S. Judson Williams. 

COPT’s 2006 
National 
Commercial Real 
Estate Customer 
Service Award for 
Excellence

15

acquisitions

Our innovative approach to development is illustrated through the purchase 
of  500  acres  of  the  591-acre  Fort  Ritchie,  a  former  U.S.  Army  base  located 
near the Maryland-Pennsylvania border. The purchase reflects a strategy to 
capture  tenant  demand  for  major  facilities  outside  of  Washington,  DC.  It’s 
also an excellent opportunity to create an environment that inspires success.

We plan to develop 1.7 million square feet of office space and 673 residential 
units—from apartments and condos to single-family homes. We will develop lots 
and select high quality builders to carry out our vision. Residents and workers 
will enjoy a quality of life that includes 24 acres of lakes, a 67-acre historic area, 
20  acres  for  community  use  and  257  acres  of  woodlands.  Included  in  our 
plan is a new community center, expanded athletic facilities and retail and 
service  amenities.  We  expect  to  turn  a  closed  army  base  into  an  economic 
engine that will generate at least 4,500 jobs while revitalizing a community.

fort ritchie

 Above (l &r): The historic “Castle Building” will become COPT’s Fort Ritchie 
sales  and  marketing  center.  Opposite  page:  Aerial  overview  of  the  591-acre 
Fort  Ritchie.  Far  right:  Frank  W.  Ziegler,  VP,  Government  &  Construction 
Services; Catherine M. Ward, SVP, Asset Management/Leasing; and Charles 
J. Fiala, Jr., SVP, Government Services, lead the Fort Ritchie development and 
leasing team.

16

Fort Ritchie represents a great opportunity for our 
clients and shareholders, a growth driver for the 
company and a revitalizing force for the surrounding 
communities. That’s The COPT Way.

17

18

IN A TRANSACTION THAT BEGAN IN 2006 and closed in January 2007, 
COPT acquired 56 office buildings and 187 acres of land from the Nottingham 
Properties portfolio, located primarily in the I-95 corridor north of Baltimore. 
We brought onboard 19 of the Nottingham employees to continue to serve 
our new tenants’ requirements.

We  believe  that  the  purchase  is  very  accretive  to  our  future  earnings  and 
strategically important for several reasons. First, we are now the largest owner 
of office properties in White Marsh, a submarket located 18 miles from the 
U.S. Army’s Aberdeen Proving Ground, which is preparing to accept thousands 
of jobs on and off post as a result of BRAC. Second, we are now the largest office 
owner in Baltimore County. And third, the acquisition enhances our dominance 
in key Maryland submarkets including Columbia and around BWI Airport.

Our strategy is to aggressively lease and manage the portfolio—as the buildings 
were  86%  leased  at  the  time  of  purchase—and  to  expand  our  relationship 
with strong existing tenants such as Comcast Corporation, Orbital Sciences 
Corporation,  MedStar  Health,  Inc.  and  The  Johns  Hopkins  University.  We 
believe  this  transaction  creates  a  value-add  opportunity  as  we  were  able  to 
purchase the buildings at below replacement cost. It also gives us a minimum 
of  2  million  square  feet  of  future  development  at  prices  significantly  
below market.

nottingham properties

Opposite  page  (l  to  r):  Corporate  Place  I,  in  White  Marsh;  216  Schilling 
Circle in Hunt Valley. Above (l to r): Campbell Corporate Center in White 
Marsh. Members of the Baltimore County properties’ leasing and property 
management  team:  John  T.  Hermann,  VP,  Asset  Management/Leasing; 
Sandi Haertig, Regional Director; Susan Roger, Senior Property Manager; 
and Janeann Streat, Leasing Representative.

19

OUR  EXPANSION  IN  COLORADO  SPRINGS  is  representative  of  The 
COPT Way. In 2005, COPT followed a tenant-centric expansion strategy and 
entered the Colorado Springs market to bring our clients closer to Peterson 
Air  Force  Base.  In  2006,  through  acquisitions,  development  and  value-add 
opportunities, we became the market’s #1 owner of office space. 

We purchased a 60,000 square foot facility for $2.6 million—well below market 
value—renovated it so that it now has 74,749 square feet, and leased it to a 
growing  client,  The  Spectranectics  Corporation.  Subsequent  to  year  end,  we 
began construction on a 60,000 square foot building, pre-leased in its entirety 
to SI International, Inc. 

We’ve  invested  $175  million  in  Colorado  Springs  and  have  grown  our 
staff  there  to  ten.  We  now  own  12  buildings  totaling  842,000  square  feet, 
which were 94% leased at year end, and have four buildings under construction 
or  development,  adding  another  292,000  square  feet.  We  own  or  control, 
through  a  joint  venture,  sufficient  entitled  land  to  build  an  additional 
2.6 million square feet. 

Colorado  Springs  offers  tremendous  potential  for  both  our  clients  and  our 
shareholders. Again—The COPT Way.

colorado 
springs

Above  (l  to  r):  Members  of  the  Colorado  Springs  team:  Harold  Martinez, 
Senior  Property  Manager;  George  Swintz,  VP,  Asset  Management/Leasing; 
and  Frank  Melara,  Senior  Construction  Manager.  Scitor’s  new  building  at 
Patriot Park. Opposite page (l to r): North Creek office complex; the lobby of 
Patriot Park V.

20

21

development

Development produces greater returns than 
any other part of our business. Yet even by our 
standards, the gains in 2006 were significant.

A LANDMARK YEAR IN DEVELOPMENT. By year end, we placed seven buildings totaling 792,762 square 
feet into service. Another 831,066 square feet of strategically located office space is currently under construction 
and  approximately  2  million  square  feet  are  in  development/re-development.  With  a  land  inventory  at  year 
end of 1,388 acres, plus the additional acreage acquired in January, we have the potential for 14 million square 
feet of development, positioning us for a decade of continuous growth.

22

Top: 306 NBP. Above (l to r): Carl M. Nelson, VP, Construction Services; Peter Z. Garver, Director, Development 
Services; and George J. Marcin, VP, Interior Construction and Renovation. Center and far right: Washington 
Technology Park II in Chantilly, Virginia. 

23

Highlights include: 

•  The purchase of 178 acres adjacent to The National Business Park which will 
allow for increased capacity and expansion of NBP over time to meet our 
largest tenants’ needs. 

•  The  development  of  two  data  centers  totaling  296,000  square  feet  for 

Northrop Grumman in Virginia.

•  Partnerships  with  the  University  of  Maryland,  Baltimore  County  and  the 

University of Maryland, College Park to develop their technology parks.

•  Our  commitment  to  build  to  LEED  Silver  certification  level.  Already  two 
new buildings have been certified at the Silver level, two at the Gold level, 
and  19  more  are  registered  in  the  LEED  program.  Additionally,  we  now 
have six COPT employees who are LEED certified professionals. Green con-
struction is the future. Our clients demand it and our environment depends 
on it. It is part of The COPT Way.

Above  (l  to  r):  Lobby  of  6711  Columbia  Gateway  Drive.  The  U.S.  Green 
Building Council’s Silver Certification medallion.

24

2006 financials

Selected Financial Data
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Management’s Report on Internal Control Over Financial Reporting

Consolidated Balance Sheet as of December 31, 2006 and 2005
Consolidated Statements of Operations for the Years Ended December 31, 2006, 2005 and 2004
Consolidated Statements of Shareholders’ Equity for the Years Ended December 31, 2006, 2005 and 2004
Consolidated Statements of Cash Flow for the Years Ended December 31, 2006, 2005 and 2004
Notes to Consolidated Financial Statements
Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer Repurchases of Equity Securities
Common Shares Performance Graph

26
28
55
Report of Independent Registered Public Accounting Firm 56
57
58
59
60
61
92
92

selected financial data corporate office properties trust and subsidiaries

The following table sets forth summary financial data as of and for each of the years ended December 31, 2002 through 2006. The 
table  illustrates  the  significant  growth  our  Company  experienced  over  the  periods  reported.  Most  of  this  growth,  particularly  
pertaining to revenues, operating income and total assets, was attributable to our addition of properties through acquisition and 
development activities. We financed most of the acquisition and development activities by incurring debt and issuing preferred 
and common equity, as indicated by the growth in our interest expense, preferred share dividends and weighted average common 
shares  outstanding.  The  growth  in  our  general  and  administrative  expenses  reflects,  in  large  part,  the  growth  in  management 
resources required to support the increased size of our portfolio. Since this information is only a summary, you should refer to our 
Consolidated Financial Statements and notes thereto and the section of this report entitled “Management’s Discussion and Analysis 
of Financial Condition and Results of Operations” for additional information.

(in thousands, except per share data and number of properties)

2006

2005

2004

2003

2002

  Total operating expenses

247,497

224,123

146,205

120,989

Revenues
  Revenues from real estate operations(1)

 Construction contract and other service  

operations revenues

  Total revenues

Expenses
  Property operating expenses(1)

 Depreciation and other amortization associated  

with real estate operations(1)

 Construction contract and other service  

operations expenses

  General and administrative expenses

Operating income
Interest expense and amortization of deferred  

financing costs(1)

Income from continuing operations before equity in  

loss of unconsolidated entities, income taxes and minor-
ity interests

Equity in loss of unconsolidated entities
Income tax (expense) benefit

Income from continuing operations before  

minority interests

Minority interests in income from continuing operations(1)

Income from continuing operations
Income from discontinued operations, net of  

minority interests(1)(2)

Gain (loss) on sales of real estate, net(1)(3)

Net income
Preferred share dividends
Issuance costs associated with redeemed preferred shares(4)
Repurchase of preferred units in excess of recorded  

$  301,319

$  242,073

$  203,944

$  164,053

$  139,428

60,084

79,234

28,903

31,740

4,704

361,403

321,307

232,847

195,793

144,132

94,504

72,253

58,982

47,564

40,186

78,712

61,049

49,289

34,599

28,452

57,345
16,936

77,287
13,534

26,996
10,938

30,933
7,893

5,008
6,697

80,343

63,789

113,906

97,184

86,642

74,804

(74,225)

(57,101)

(44,568)

(41,487)

(38,991)

39,681
(92)
(887)

38,702
(4,584)

34,118

14,377
732

49,227
(15,404)
(3,896)

40,083
(88)
(668)

39,327
(5,245)

34,082

4,681
268

39,031
(14,615)
—

42,074
(88)
(795)

41,191
(5,473)

35,718

1,427
(113)

37,032
(16,329)
(1,813)

33,317
(98)
169

33,388
(6,260)

27,128

3,413
336

30,877
(12,003)
—

24,798
(402)
347

24,743
(5,996)

18,747

2,778
1,776

23,301
(10,134)
—

book value(5)

—

—

—

(11,224)

—

Net income available to common shareholders

$ 

29,927

$ 

24,416

$ 

18,890

$ 

7,650

$ 

13,167

(continued)

2626

 
 
 
 
 
 
 
(in thousands, except per share data and number of properties)

2006

2005

2004

2003

2002

Basic earnings per common share

Income from continuing operations

  Net income available to common shareholders
Diluted earnings per common share
Income from continuing operations

  Net income available to common shareholders
Weighted average common shares outstanding—basic
Weighted average common shares outstanding—diluted
Balance Sheet Data (as of year end):
Investment in real estate
Total assets
Debt
Total liabilities
Minority interests
Shareholders’ equity
Other Financial Data (for the year ended):
Cash flows provided by (used in):
  Operating activities
Investing activities
  Financing activities
Numerator for diluted EPS
Diluted funds from operations(6)
Diluted funds from operations per share(6)
Cash dividends declared per common share
Property Data (as of year end):
Number of properties owned(1)(7)
Total rentable square feet owned(1)(7)

$ 
$ 

$ 
$ 

0.37
0.72

0.36
0.69
41,463
43,262

$ 
$ 

$ 
$ 

0.53
0.65

0.51
0.63
37,371
38,997

$ 
$ 

$ 
$ 

0.53
0.57

0.50
0.54
33,173
34,982

$ 
$ 

$ 
$ 

0.16
0.29

0.15
0.27
26,659
28,021

$ 
$ 

$ 
$ 

0.46
0.59

0.44
0.56
22,472
23,350

$ 2,111,310
$ 2,419,601
$ 1,498,537
$ 1,629,111
$  116,187
$  674,303

$ 1,888,106
$ 2,129,759
$ 1,348,351
$ 1,442,036
$  105,210
$  582,513

$ 1,544,501
$ 1,732,026
$ 1,022,688
$ 1,111,224
$ 
98,878
$  521,924

$ 1,189,258
$ 1,332,076
$  738,698
$  801,899
$ 
79,796
$  450,381

$ 1,042,955
$ 1,138,721
$  705,056
$  749,338
$  100,886
$  288,497

$  113,151
$  (253,834)
$  137,822
29,927
$ 
98,937
$ 
1.91
$ 
1.18
$ 

$ 
95,944
$  (419,093)
$  320,112
24,416
$ 
88,801
$ 
1.86
$ 
1.07
$ 

$ 
84,494
$  (263,792)
$  183,638
18,911
$ 
76,248
$ 
1.74
$ 
0.98
$ 

$ 
67,783
$  (172,949)
$  108,656
7,650
$ 
61,268
$ 
1.56
$ 
0.91
$ 

$ 
62,242
$  (128,571)
65,680
$ 
13,711
$ 
52,854
$ 
1.44
$ 
0.86
$ 

170
15,050

165
13,708

143
11,765

118
9,876

110
8,942

(1)   Certain prior period amounts have been reclassified to conform with the current presentation. These reclassifications did not affect consolidated net 

income or shareholders’ equity.

(2)   Reflects income derived from one operating real estate property that we sold in 2003, three operating real estate properties that we sold in 2005 and 

seven operating real estate properties we sold in 2006 (see Note 18 to our Consolidated Financial Statements).

(3)   Reflects gain (loss) from sales of properties and unconsolidated real estate joint ventures not associated with discontinued operations.

(4)   Reflects a decrease to net income available to common shareholders pertaining to the original issuance costs recognized upon the redemption of the 

Series E and Series F Preferred Shares of beneficial interest in 2006 and the Series B Preferred Shares of beneficial interest in 2004.

(5)   Reflects a decrease to net income available to common shareholders representing the excess of the repurchase price of the Series C Preferred Units in 

our Operating Partnership over the sum of the recorded book value of the units and the accrued and unpaid return to the unitholder.

(6)   For  definitions  of  diluted  funds  from  operations  per  share  and  diluted  funds  from  operations  and  reconciliations  of  these  measures  to  their  
comparable measures under generally accepted accounting principles, you should refer to the section entitled “Funds from Operations” within the 
section entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

(7)   Amounts reported reflect only wholly owned properties.

2727

 
 
 
management’s discussion and analysis of financial condition and results of operations

You should refer to our Consolidated Financial Statements and 
the notes thereto and our Selected Financial Data table as you 
read this section.

This section contains “forward-looking” statements, as defined 
in the Private Securities Litigation Reform Act of 1995, that are 
based  on  our  current  expectations,  estimates  and  projections 
about future events and financial trends affecting the financial 
condition  and  operations  of  our  business.  Forward-looking 
statements can be identified by the use of words such as “may,” 
“will,” “should,” “expect,” “estimate” or other comparable ter-
minology. Forward-looking statements are inherently subject to 
risks and uncertainties, many of which we cannot predict with 
accuracy  and  some  of  which  we  might  not  even  anticipate. 
Although  we  believe  that  the  expectations,  estimates  and  pro-
jections reflected in such forward-looking statements are based 
on  reasonable  assumptions  at  the  time  made,  we  can  give  no 
assurance  that  these  expectations,  estimates  and  projections 
will  be  achieved.  Future  events  and  actual  results  may  differ 
materially  from  those  discussed  in  the  forward-looking  state-
ments.  Important  factors  that  may  affect  these  expectations, 
estimates and projections include, but are not limited to:

•   our ability to borrow on favorable terms;

•   general  economic  and  business  conditions,  which  will, 
among  other  things,  affect  office  property  demand  and 
rents,  tenant  creditworthiness,  interest  rates  and  financ-
ing availability;

•   adverse  changes  in  the  real  estate  markets,  including, 
among  other  things,  increased  competition  with  other 
companies;

•   risks of real estate acquisition and development activities, 
including,  among  other  things,  risks  that  development 
projects  may  not  be  completed  on  schedule,  that  tenants 
may not take occupancy or pay rent or that development 
and operating costs may be greater than anticipated;

•   risks of investing through joint venture structures, includ-
ing  risks  that  our  joint  venture  partners  may  not  fulfill 
their financial obligations as investors or may take actions 
that are inconsistent with our objectives;

•   our ability to satisfy and operate effectively under federal 
income  tax  rules  relating  to  real  estate  investment  trusts 
and partnerships;

•   governmental actions and initiatives; and

•   environmental requirements.

We undertake no obligation to update or supplement forward-
looking statements.

OVERVIEW

We are a real estate investment trust (“REIT”) that focuses on 
the  acquisition,  development,  ownership,  management  and 
leasing of primarily Class A suburban office properties in select, 
demographically strong submarkets where we can achieve criti-
cal  mass,  operating  synergies  and  key  competitive  advantages, 
including  attracting  high  quality  tenants  and  securing  acqui-
sition  and  development  opportunities.  We  also  have  a  core  
customer expansion strategy that is built on meeting, through 
acquisitions  and  development,  the  multilocation  requirements 
of  our  strategic  tenants.  As  of  December  31,  2006,  our  invest-
ments in real estate included the following:

•   170  wholly  owned  operating  properties  in  our  portfolio 

totaling 15.1 million square feet;

•   16  wholly  owned  office  properties  under  construction  or 
development that we estimate will total approximately 1.8 
million  square  feet  upon  completion,  and  two  wholly 
owned  office  properties  totaling  approximately  129,000 
square feet that were under redevelopment;

•   wholly  owned  land  parcels  totaling  1,048  acres  that  we 
believe are potentially developable into approximately 8.4 
million square feet; and

•   partial  ownership  interests  in  a  number  of  other  real  
estate  projects  in  operations  or  under  development  or 
redevelopment.

REITs  were  created  by  the  United  States  Congress  in  order  to 
provide  large  numbers  of  investors  with  the  ability  to  make 
investments  into  entities  that  own  large  scale  commercial  real 
estate. One unique aspect of a REIT is that the entity typically 
does  not  pay  corporate  income  tax,  provided  that  the  entity  
distributes  100%  of  its  taxable  income  to  its  shareholders  and 
meets  a  number  of  other  strict  requirements  of  the  Internal 
Revenue Code of 1986, as amended (it is noteworthy that REITs 
are  required  to  distribute  a  minimum  of  only  90%  of  taxable 
income  to  maintain  their  tax  status  as  a  REIT,  although  any 
differential  between  the  90%  and  100%  would  be  taxable). 
Most of our revenues relating to our real estate operations are 
derived from rents and property operating expense reimburse-
ments  earned  from  tenants  leasing  space  in  our  properties. 
Most of our expenses relating to our real estate operations take 
the  form  of  (1)  property  operating  costs,  such  as  real  estate 
taxes,  utilities  and  repairs  and  maintenance;  (2)  financing 
costs, such as interest and loan costs; and (3) depreciation and 
amortization associated with our operating properties.

2828

Of  the  170  wholly  owned  operating  properties  in  our  port-
folio, 157 were located in the Mid-Atlantic region of the United 
States.  Our  primary  regions  as  of  December  31,  2006  are  set 
forth below:

•   Baltimore/Washington Corridor (defined as the Maryland 

counties of Howard and Anne Arundel);

•   Northern Virginia (defined as Fairfax County, Virginia);

•   Suburban Maryland (defined as the Maryland counties of 

Montgomery, Prince George’s and Frederick);

•   St. Mary’s & King George Counties (located in Maryland 

and Virginia, respectively);

•   Suburban Baltimore, Maryland;

•   Colorado Springs, Colorado;

•   San Antonio, Texas;

•   Northern/Central  New  Jersey  (as  of  December  31,  2006, 
all  of  our  properties  in  this  segment  were  located  in 
Central New Jersey); and

•   Greater Philadelphia, Pennsylvania.

As of December 31, 2006, 124 of our properties were located in 
what is widely known as the Greater Washington, D.C. region, 
which  includes  the  first  four  regions  set  forth  above,  and  23 
were located in neighboring Suburban Baltimore. The core cus-
tomer expansion strategy that we began implementing in 2004 
led  us  into  the  next  two  regions  set  forth  above:  Colorado 
Springs and San Antonio, Texas. The last two regions set forth 
above are considered non-core to the Company. We discuss fur-
ther the geographic concentrations of our property ownership 
in the section below entitled “Concentration of Operations.”

Our  strategy  for  operations  and  growth  revolves  around  our 
goal to be the landlord of choice for select high quality tenants. 
As a result of this strategy, a large concentration of our revenue 
is  derived  from  several  large  tenants.  Our  largest  tenants  are 
also heavily concentrated in the United States defense industry. 
Several  noteworthy  statistics  that  demonstrate  our  tenant  and 
industry concentrations are set forth below:

Percentage of  
Annualized Rental  
Revenue(1) of  
Wholly Owned  
Properties at  
December 31, 2006

Largest tenant, United States Government
Five largest tenants
Twenty largest tenants
Tenants in the United States defense industry

16.3%
34.2%
56.7%
54.4%

(1)   Defined below in the section entitled “Concentration of Operations” in the sub-

section entitled “Geographic Concentration of Property Operations.”

We discuss further our lease concentrations in the section below 
entitled “Concentration of Operations.”

In  order  to  maximize  the  revenue  potential  of  our  properties, 
we  try  to  maintain  high  levels  of  occupancy;  as  a  result,  we  
consider  occupancy  rates  to  be  an  important  measure  of  the 
productivity  of  our  properties.  One  way  that  we  attempt  to 
maximize occupancy rates is by renewing a high percentage of 
our  existing  tenants;  accordingly,  tenant  renewal  rates  are 
important to us in monitoring our leasing activities and tenant 
relationships. In managing the effect of our leasing activities on 
our financial position and future operating performance stabil-
ity, we also monitor the timing of our lease maturities with the 
objective that the timing of such maturities not be highly con-
centrated  in  a  given  one-year  or  five-year  period.  The  table 
below sets forth certain occupancy and leasing information as 
of  or  for  the  year  ended  December  31,  2006  for  our  portfolio  
of wholly owned properties:

Occupancy
Renewal rate of square footage for scheduled lease expira-

tions during year

Average contractual annual rental rate per square foot(1)
Weighted average lease term (in years)(2)

(1)   Includes estimated expense reimbursements.

92.8%

55.4%
$20.90
5.0

(2)   See  assumption  relating  to  our  United  States  Government  leases  in  section  
entitled  “Results  of  Operations”  in  the  subsection  entitled  “Occupancy  and 
Leasing.”

We  discuss  further  in  the  section  below  entitled  “Results  of 
Operations” in the subsection entitled “Occupancy and Leasing.”

Achieving  optimal  performance  from  our  properties  is  highly 
important  to  our  Company.  We  evaluate  the  performance  of 
our  properties  by  focusing  on  changes  in  revenues  from  real 
estate operations (comprised of (1) rental revenue and (2) ten-
ant  recoveries  and  other  real  estate  operations  revenue)  and 
property  operating  expenses.  However,  since  we  experienced 
significant growth in number of operating properties between 
2004 and 2006, our growth in revenues from real estate opera-
tions and property operating expenses over that time frame can 
be  misleading.  Therefore,  we  evaluate  (1)  changes  in  revenues 
from  real  estate  operations  and  property  operating  expenses 
attributable  to  property  additions  separately  from  (2)  the 
changes attributable to properties that were owned and opera-
tional throughout any two periods being compared, properties 
that  we  collectively  refer  to  as  the  Same-Office  Properties. 
During 2006, we:

•   experienced significant growth from 2005 in revenues from 
real  estate  operations  and  property  operating  expenses 
due primarily to the addition of properties through acqui-
sition and construction activities since January 1, 2005;

2929

management’s discussion and analysis of financial condition and results of operations

•   had a $6.5 million, or 2.9%, increase in revenues from the 
Same-Office  Properties  compared  to  2005  due  primarily 
to  increased  rental  revenue  and  operating  expense  reim-
bursements at such properties; and

•   had a $4.7 million, or 6.8%, increase in property operat-
ing  expenses  from  the  Same-Office  Properties  compared 
to 2005 due in large part to increased utilities, real estate 
taxes and repairs and maintenance expenses, partially off-
set by decreased snow removal expenses.

We discuss these changes further in the section below entitled 
“Results  of  Operations”  in  the  subsection  entitled  “Revenues 
from Real Estate Operations and Property Operating Expenses.”

In  addition  to  owning  real  estate  properties,  we  provide  real 
estate-related  services  that  include  (1)  property  management; 
(2)  construction  and  development  management;  and  (3)  heat-
ing and air conditioning services and controls. The gross reve-
nue and costs associated with these services generally bear little 
relationship  to  the  level  of  our  activity  from  these  operations 
since a substantial portion of the costs are subcontracted costs 
that are reimbursed to us by the customer at no mark up. As a 
result,  the  operating  margins  from  these  operations  are  small 
relative  to  the  revenue.  We  use  the  net  of  such  revenues  and 
expenses to evaluate the performance of our service operations. 
For  2006,  the  operating  margins  of  our  service  operations 
increased  $792,000  compared  to  2005.  These  operations  are 
discussed  further  in  the  section  below  entitled  “Results  of 
Operations” in the subsection entitled “Construction Contract 
and Other Service Revenue and Expenses.”

Our  2006  net  income  available  to  common  shareholders 
increased  22.6%  and  our  diluted  earnings  per  share  increased 
9.5% compared to 2005. We discuss significant factors contrib-
uting to these changes within subsections of the section below 
entitled “Results of Operations.”

The investment portion of our growth strategy focuses primar-
ily  on  two  activities:  acquisitions  and  development.  These 
activities  typically  target  suburban  office  properties  in  our 
existing geographic regions, neighboring regions or new regions 
meeting our investment criteria, but they may also target other 
properties as a result of our core customer expansion strategy. 
Since we take an opportunistic yet disciplined approach to our 
investment activities, the volume of these activities and alloca-
tion between acquisitions versus development naturally change 
from year to year. Highlights of our 2006 acquisition and devel-
opment activities are set forth below:

•   we  acquired  in  our  primary  geographic  regions  set  forth 
above six operating properties totaling 1.0 million square 
feet,  a  building  to  be  redeveloped  totaling  74,749  square  

feet and seven parcels of land that we believe can support  
up  to  2.3  million  developable  square  feet,  for  a  total  of  
$169.7 million;

•   we acquired 500 acres of the 591-acre former Fort Ritchie 
United States Army base located in Cascade, Washington 
County, Maryland for a value of $5.6 million with an ini-
tial cash outlay of $2.5 million and expect to acquire the 
remaining 91 acres in 2007. The 591-acre parcel is antici-
pated to accommodate a total of 1.7 million square feet of 
office  space  and  673  residential  units,  including  approxi-
mately 306,000 square feet of existing office space and 110 
existing rentable residential units;

•   we  had  seven  newly-constructed  properties  totaling 
866,000 square feet become fully operational. We also had 
68,196  square  feet  placed  into  service  in  one  partially 
operational property; and

•   we had eight properties under construction (seven wholly 
owned),  four  properties  under  redevelopment  (two  
wholly owned) and 11 properties under development (nine 
wholly owned) at December 31, 2006.

While  we  generally  do  not  acquire  properties  with  the  intent  
of  selling  them,  we  do  sell properties  from  time  to  time when 
we  believe  that  most  of  the  earnings  growth  potential  in  that 
property has been realized, or determine that the property no 
longer  fits  within  our  strategic  plans  due  to  its  type  and/or  
location.  During  2006,  we  sold  seven  operating  properties, 
including  three  from  one  of  our  non-core  regions,  a  newly  
constructed  property  and  a  parcel  of  land  for  a  total  of  $83.0 
million, resulting in recognized gains before minority interest 
totaling $17.3 million.

Our financing policy is aimed at maintaining a flexible capital 
structure  in  order  to  facilitate  consistent  growth  and  perfor-
mance  in  the  face  of  differing  market  conditions  in  the  most 
cost-effective  way  possible.  As  part  of  this  policy,  we  monitor 
(1) levels of debt relative to our overall capital structure; (2) the 
relationship of certain measures of earnings to certain financ-
ing cost requirements (coverage ratios); (3) the relationship of 
our total variable-rate debt to our total debt; and (4) the timing 
of our debt maturities to ensure that the maximum maturities 
of debt in any year do not exceed a defined percentage of total 
assets.  We  also  pursue  opportunities,  when  we  believe  market 
conditions  to  be  favorable,  to:  (1)  reduce  financing  costs  by  
refinancing  existing  debt  or  redeeming  existing  preferred 
equity;  (2)  issue  common  and  preferred  shares  of  beneficial 
interest  (“common  shares”  and  “preferred  shares”);  and  (3) 
issue  equity  units  in  our  Operating  Partnership.  Highlights  
of our 2006 financing activities are set forth below:

3030

•   we  sold  2.0  million  common  shares  to  an  underwriter  
at  a  net  price  of  $41.31  per  share,  for  net  proceeds  of  
$82.4 million;

•   we  sold  3,390,000  Series  J  Cumulative  Redeemable  Pre-
ferred Shares (the “Series J Preferred Shares”) at a price of 
$25 per share for net proceeds of $81.9 million;

•   we  redeemed  the  Series  E  Cumulative  Redeemable  Pre-
ferred Shares of beneficial interest (the “Series E Preferred 
Shares”)  and  the  Series  F  Cumulative  Redeemable  Pre-
ferred Shares of beneficial interest (the “Series F Preferred 
Shares”) for a redemption price of $25 per share, resulting 
in a total payment of $64.4 million. We recognized a $3.9 
million  decrease  to  net  income  available  to  common 
shareholders  pertaining  to  the  original  issuance  costs  
of these shares;

•   we issued a $200.0 million aggregate principal amount of 
3.50% Exchangeable Senior Notes due 2026. The notes are 
redeemable  by  us  on  or  after  September  20,  2011.  The 
notes also contain an exchange settlement feature, which 
provides that the notes may, under certain circumstances, 
be  exchangeable  for  cash  (up  to  the  principal  amount  of 
the notes) and, with respect to any excess exchange value, 
may be exchangeable into (at our option) cash, our com-
mon shares or a combination of cash and common shares 
at  an  initial  exchange  rate  of  18.4162  shares  per  $1,000 
principal amount of the notes; and

•   we  borrowed  $146.5  million  under  a  10-year  mortgage 
payable requiring payments of interest only at a fixed rate 
of 5.43%.

We discuss our 2006 investing and financing activities further 
in the section below entitled “Liquidity and Capital Resources,” 
along with discussions of, among other things, the following:

•   our cash flows;

•   how  we  expect  to  generate  cash  for  short-  and  long-term 

capital needs;

•   our  off-balance  sheet  arrangements  in  place  that  are  rea-

sonably likely to affect our financial condition; and

•   our commitments and contingencies.

On  January  9  and  10,  2007,  we  completed  a  series  of  transac-
tions that resulted in the acquisition of 56 operating properties 
totaling  2.4  million  square  feet  and  land  parcels  totaling  187 
acres.  We  refer  to  this  transaction  as  the  Nottingham  Acqui-
sition.  All  of  the  acquired  properties  are  located  in  Maryland, 
with 36 of the operating properties, totaling 1.6 million square 
feet, and land parcels totaling 175 acres, located in White Marsh, 
Maryland  and  the  remaining  properties  and  land  parcels 
located in other regions in Northern Baltimore County and the 

Baltimore/Washington Corridor. We believe that the land par-
cels totaling 187 acres can support at least 2.0 million develop-
able square feet. We completed the Nottingham Acquisition for 
an aggregate cost of approximately $363.9 million. We financed 
the acquisition by issuing $26.6 million in Series K Cumulative 
Redeemable Convertible Preferred Shares of beneficial interest 
(the  “Series  K  Preferred  Shares”)  to  the  seller,  issuing  $154.9 
million  in  common  shares  to  the  seller  at  a  deemed  value  
of  $49  per  share,  using  $20.1  million  from  an  escrow  funded  
by proceeds from one of our property sales and using debt bor-
rowings for the remainder. We discuss this transaction further 
in the section below entitled “Liquidity and Capital Resources,” 
and the section entitled “Results of Operations” in the subsec-
tion entitled “Occupancy and Leasing.”

CRITICAL ACCOUNTING POLICIES  
AND ESTIMATES

Our Consolidated Financial Statements are prepared in accor-
dance  with  generally  accepted  accounting  principles  in  the 
United States of America (“GAAP”), which require us to make 
certain  estimates  and  assumptions.  A  summary  of  our  sig-
nificant  accounting  policies  is  provided  in  Note  2  to  our 
Consolidated  Financial  Statements.  The  following  section  is  a 
summary of certain aspects of those accounting policies involv-
ing estimates and assumptions that (1) require our most diffi-
cult, subjective or complex judgments in accounting for highly 
uncertain matters or matters that are susceptible to change and 
(2)  materially  affect  our  reported  operating  performance  or 
financial  condition. It  is  possible  that  the  use  of  different rea-
sonable  estimates  or  assumptions  in  making  these  judgments 
could result in materially different amounts being reported in 
our  Consolidated  Financial  Statements.  While  reviewing  this 
section, you should refer to Note 2 to our Consolidated Financial 
Statements, including terms defined therein.

•   When  we  acquire  real  estate  properties,  we  allocate  the 
acquisition  to  numerous  tangible  and  intangible  compo-
nents. Most of the terms in this bullet section are defined 
in  the  section  of  Note  2  to  the  Consolidated  Financial 
Statements entitled “Acquisitions of Real Estate.” Our pro-
cess  for  determining  the  allocation  to  these  components  
is very complex and requires many estimates and assump-
tions.  Included  among  these  estimates  and  assumptions 
are the following: (1) determination of market rental rates; 
(2)  estimate  of  leasing  and  tenant  improvement  costs  
associated with the remaining term of acquired leases for 
deemed  cost  avoidance;  (3)  leasing  assumptions  used  in 
determining  the  lease-up  value,  as-if  vacant  value  and  
tenant relationship value, including the rental rates, period 
of time that it will take to lease vacant space and estimated 
tenant improvement and leasing costs; (4) estimate of the 

3131

management’s discussion and analysis of financial condition and results of operations

property’s  future  value  in  determining  the  as-if  vacant 
value;  (5)  estimate  of  value  attributable  to  market  con-
centration  premiums  and  tenant  relationship  values;  and 
(6)  allocation  of  the  as-if  vacant  value  between  land  and 
building.  A  change  in  any  of  the  above  key  assumptions, 
most  of  which  are  extremely  subjective,  can  materially 
change not only the presentation of acquired properties in 
our  Consolidated  Financial  Statements  but  also  reported 
results  of  operations.  The  allocation  to  different  compo-
nents affects the following:

   the  amount  of  the  acquisition  costs  allocated  among 
different categories of assets and liabilities on our bal-
ance sheet, the amount of costs assigned to individual 
properties  in  multiple  property  acquisitions  and  the 
amount  of  costs  assigned  to  individual  tenants  at  the 
time of acquisition;

   where the amortization of the components appear over 
time  in  our  statements  of  operations.  Allocations  to  
the  lease  to  market  value  component  are  amortized 
into  rental  revenue,  whereas  allocations  to  most  of  
the  other  components  (the  one  exception  being  the 
land  component  of  the  as-if  vacant  value)  are  amor-
tized  into  depreciation  and  amortization  expense.  
As  a  REIT,  this  is  important  to  us  since  much  of  the 
investment  community  evaluates  our  operating  per-
formance  using  non-GAAP  measures  such  as  funds 
from  operations,  the  computation  of  which  includes 
rental  revenue  but  does  not  include  depreciation  and 
amortization expense; and

   the  timing  over  which  the  items  are  recognized  as  
revenue  or  expense  in  our  statements  of  operations. 
For  example,  for  allocations  to  the  as-if  vacant  value, 
the  land  portion  is  not  depreciated  and  the  building 
portion  is  depreciated  over  a  longer  period  of  time  
than  the  other  components  (generally  40  years). 
Allocations  to  lease  to  market  value,  deemed  cost 
avoidance, lease-up value and tenant relationship value 
are  amortized  over  significantly  shorter  time  frames, 
and  if  individual  tenants’  leases  are  terminated  early, 
any  unamortized  amounts  remaining  associated  with 
those  tenants  are  generally  expensed  upon  termina-
tion. These differences in timing can materially affect 
our  reported  results  of  operations.  In  addition,  we 
establish  lives  for  lease-up  value  and  tenant  relation-
ship  value  based  on  our  estimates  of  how  long  we 
expect the respective tenants to remain in the proper-
ties;  establishing  these  lives  requires  estimates  and 
assumptions that are very subjective.

•   When  events  or  circumstances  indicate  that  a  property 
may be impaired, we perform an undiscounted cash flow 

3232

analysis.  We  consider  an  asset  to  be  impaired  when  its 
undiscounted expected future cash flows are less than its 
depreciated cost. If such impairment is present, an impair-
ment loss is recognized based on the excess of the carrying 
amount of the asset over its fair value. We compute a real 
estate asset’s undiscounted expected future cash flows and 
fair  value  using  certain  estimates  and  assumptions.  As  a 
result,  these  estimates  and  assumptions  impact  whether 
an impairment is deemed to have occurred and the amount 
of impairment loss that we recognize.

•   We  generally  use  three  different  accounting  methods  to 
report  our  investments  in  entities:  the  consolidation 
method, the equity method and the cost method (see Note 
2 to our Consolidated Financial Statements). We generally 
use  the  consolidation  method  when  we  own  most  of  
the  outstanding  voting  interests  in  an  entity  and  can  
control  its  operations.  In  accordance  with  Financial 
Accounting  Standards  Board  (“FASB”)  Interpretation  
No.  46(R),  “Consolidation  of  Variable  Interest  Entities” 
(“FIN  46(R)”),  we  also  consolidate  certain  entities  when 
control  of  such  entities  can  be  achieved  through  means 
other  than  voting  rights  (“variable  interest  entities”  or 
“VIEs”)  if  we  are  deemed  to  be  the  primary  beneficiary. 
Generally,  FIN  46(R)  applies  when  either  (1)  the  equity 
investors (if any) lack one or more of the essential charac-
teristics  of  a  controlling  financial  interest;  (2)  the  equity 
investment  at  risk  is  insufficient  to  finance  that  entity’s 
activities  without  additional  subordinated  financial  sup-
port;  or  (3)  the  equity  investors  have  voting  rights  that  
are  not  proportionate  to  their  economic  interests  and  
the  activities  of  the  entity  involve  or  are  conducted  on 
behalf  of  an  investor  with  a  disproportionately  small  
voting  interest.  We  generally  use  the  equity  method  of 
accounting when we own an interest in an entity and can 
exert  significant  influence  over,  but  cannot  control,  the 
entity’s  operations.  In  making  these  determinations,  we 
typically need to make subjective estimates and judgments 
regarding  the  entity’s  future  operating  performance, 
financial  condition,  future  valuation  and  other  variables 
that may  affect  the  partners’  share  of  cash flow from the 
entity over time. We also need to estimate the probability 
of  different  scenarios  taking  place  over  time  and  project 
the effect that each of those scenarios would have on vari-
ables  affecting  the  partners’  cash  flows.  The  conclusion 
reached as a result of this process affects whether or not we 
use the consolidation method in accounting for our invest-
ment or either the equity or financing method of account-
ing.  Whether  or  not  we  consolidate  an  investment  can 
materially affect our Consolidated Financial Statements.

•   We  issue  share  options  and  restricted  shares  to  many  of 
our employees. Prior to January 1, 2006, very little expense 
was required to be recognized in our financial statements 
for  share  options  under  GAAP.  On  January  1,  2006,  we 
adopted  Statement  of  Financial  Accounting  Standards  
No.  123(R),  “Share-Based  Payment”  (“SFAS  123(R)”). 
SFAS 123(R) requires us to measure the cost of employee 
services  received  in  exchange  for  an  award  of  equity 
instruments based generally on the fair value of the award 
on  the  grant  date;  such  cost  should  then  be  recognized 
over  the  period  during  which  the  employee  is  required  
to provide service in exchange for the award (generally the 
vesting  period).  We  compute  the  grant-date  fair  value  
of  share  options  using  the  Black-Scholes  option-pricing 
model,  which  requires  the  following  input  assumptions: 
risk-free interest rate, expected life, expected volatility and 
expected  dividend  yield.  SFAS  123(R)  also  requires  that 
share-based compensation be computed based on awards 
that are ultimately expected to vest; as a result, future for-
feitures of our share options and restricted shares are to be 
estimated at the time of grant and revised, if necessary, in 
subsequent  periods  if  actual  forfeitures  differ  from  those 
estimates.  The  input  assumptions  used  under  the  Black-
Scholes  option-pricing  model  and  the  estimates  used  in 
deriving the forfeiture rates for share options and restricted 
shares  are  subjective  and  require  a  fair  amount  of  judg-
ment.  As  a  result,  these  estimates  and  assumptions  can 
affect  the  amount  of  expense  that  we  recognize  in  our 
Consolidated  Financial  Statements  for  options  and 
restricted shares.

CONCENTRATION OF OPERATIONS

Geographic Concentration of Property Operations
During 2005 and 2006, we:

•   increased  our  portfolio  of  wholly  owned  properties  in  
the  Baltimore/Washington  Corridor,  Northern  Virginia, 
Suburban  Baltimore  and  Suburban  Maryland  regions 
through  acquisitions  and  newly  constructed  properties 
placed into service;

•   made  our  initial  entry  into  the  San  Antonio,  Texas  and 
Colorado Springs, Colorado regions through acquisitions 
in  2005  and  further  expanded  our  presence  in  Colorado 
Springs through additional acquisitions in 2006;

•   sold 80% of the ownership interest in our Greater Harris-
burg  portfolio  by  contributing  it  into  a  real  estate  joint 
venture in 2005;

•   sold  three  wholly  owned  properties  in  Northern/Central 
New  Jersey,  two  in  Suburban  Baltimore  and  two  in 
Suburban Maryland in 2006; and

•   sold  three  wholly  owned  properties  in  Northern/Central 
New Jersey and one in the Baltimore/Washington Corridor 
in 2005.

The table below sets forth the changes in the regional allocation 
of our annualized rental revenue occurring primarily as a result 
of these acquisition and development activities and changes in 
leasing activity:

% of Annualized  
Rental Revenue of  
Wholly Owned Properties  
as of December 31,

2006

2005

2004

51.2%
20.5%
7.5%
4.2%
4.2%
4.1%
3.7%
2.4%
2.2%
N/A

47.8%
21.5%
10.1%
4.3%
1.7%
5.2%
4.0%
1.5%
3.9%
N/A

49.4%
23.2%
4.1%
4.7%
N/A
3.6%
4.6%
N/A
6.5%
3.9%

100.0% 100.0% 100.0%

REGION
Baltimore/Washington Corridor
Northern Virginia
Suburban Baltimore
St. Mary’s and King George Counties
Colorado Springs, Colorado
Suburban Maryland
Greater Philadelphia
San Antonio, Texas
Northern/Central New Jersey
Greater Harrisburg

Annualized rental revenue is a measure that we use to evaluate 
the source of our rental revenue as of a point in time. It is com-
puted  by  multiplying  by  12  the  sum  of  monthly  contractual 
base  rents  and  estimated  monthly  expense  reimbursements 
under active leases as of a point in time. We consider annual-
ized rental revenue to be a useful measure for analyzing revenue 
sources  because,  since  it  is  point-in-time  based,  it  does  not  
contain increases and decreases in revenue associated with peri-
ods in which lease terms were not in effect; historical revenue 
under  GAAP  does  contain  such  f luctuations.  We  find  the  
measure  particularly  useful  for  leasing,  tenant,  segment  and 
industry analysis.

With the completion of the Nottingham Acquisition in January 
2007, the percentage of annualized revenue derived from wholly 
owned  properties  in  the  Suburban  Baltimore  region  increased 
to approximately twice what it was prior to the acquisition.

Concentration of Leases with Certain Tenants
We  experienced  changes  in  our  tenant  base  during  2006  and 
2005  due  primarily  to  acquisitions,  development  and  leasing 
activity.  The  following  schedule  lists  our  20  largest  tenants  in 
our portfolio of wholly owned properties based on percentage 
of annualized rental revenue:

3333

management’s discussion and analysis of financial condition and results of operations

Percentage of Annualized  
Rental Revenue of  
Wholly Owned Properties  
for 20 Largest Tenants  
as of December 31,

2006

2005

2004

16.3%
6.9%
4.2%
3.8%
3.0%
3.0%
3.0%
2.4%
2.1%
2.1%
1.4%
1.2%

1.1%
1.0%
1.0%
1.0%
0.8%
0.8%
0.8%
0.8%
N/A
N/A
N/A
N/A
N/A

15.2%
5.0%
4.5%
4.1%
2.7%
3.1%
3.4%
2.6%
2.2%
2.1%
1.6%
1.3%

N/A
1.0%
1.1%
N/A
0.9%
0.9%
N/A
N/A
1.3%
1.0%
1.0%
0.9%
N/A

13.3%
5.5%
3.6%
5.2%
4.2%
3.5%
3.9%
3.8%
2.3%
2.3%
1.8%
1.4%

N/A
N/A
1.2%
1.0%
1.1%
N/A
N/A
N/A
1.4%
1.3%
1.1%
1.0%
1.3%

56.7%
43.3%

55.9%
44.1%

60.2%
39.8%

100.0% 100.0% 100.0%

TENANT
United States Government
Booz Allen Hamilton, Inc.
Northrop Grumman Corporation
Computer Sciences Corporation(1)
AT&T Corporation(1)
Unisys(2)
L-3 Communications Holdings, Inc.(1)
General Dynamics Corporation
The Aerospace Corporation
Wachovia Bank
The Boeing Company(1)
Ciena Corporation
Science Applications International 

Corporation

Lockheed Martin Corporation
Magellan Health Services, Inc.
BAE Systems PLC
Merck & Co., Inc.(2)
Wyle Laboratories, Inc.
Harris Corporation
EDO Corporation
VeriSign, Inc.
PricewaterhouseCoopers LLP
Johns Hopkins University(1)
Carefirst, Inc. and Subsidiaries(1)
Commonwealth of Pennsylvania(1)

Subtotal of 20 largest tenants
All remaining tenants

Total

(1)   Includes affiliated organizations and agencies and predecessor companies.

(2)   Unisys subleases space to Merck and Co., Inc.; revenue from this subleased space 

is classified as Merck & Co., Inc. revenue.

One aspect of our strategy involves focusing on the formation 
of strategic alliances with certain of our tenants from the stand-
point of fulfilling their real estate needs in multiple locations. 
This strategy influences not only our leasing activities but also 
our acquisition and construction activities. As a result, our rev-
enue  concentration  with  individual  tenants  could  continue  to 
grow over time as a result of this strategy.

Most of the leases with the United States Government provide 
for  a  series  of  one-year  terms  or  provide  for  early  termination 
rights. The government may terminate its leases if, among other 
reasons, the United States Congress fails to provide funding.

Industry Concentration of Tenants
The percentage of total annualized rental revenue in our wholly 
owned properties derived from the United States defense indus-
try increased in 2005 and 2006. One reason for this increase is 
the  continuing  expansion  of  the  industry  in  the  Greater 
Washington, D.C. region and, in particular, in our submarkets 
since the events of September 11, 2001. Another reason for the 
increase  is  that  certain  of  the  properties  we  acquired  or  con-
structed  in  2005  and  2006  have  leases  with  the  United  States 
Government and defense contractors. The table below sets forth 
the percentage of annualized rental revenue in our portfolio of 
wholly  owned  properties  derived  from  that  industry  and,  by 
doing so, demonstrates our increasing concentration:

% of Annualized  
Rental Revenue of  
Wholly Owned Properties  
from Defense Industry Tenants 
as of December 31,

2006

2005

2004

Total Portfolio
Baltimore/Washington Corridor
Northern Virginia
Suburban Baltimore
Suburban Maryland
St. Mary’s and King George Counties
Colorado Springs
San Antonio

54.4%
49.7%
66.7%
65.7%
54.5%
50.4%
9.8%
6.8%
13.3%
2.2%
89.8%
90.7%
74.1%
39.4%
100.0% 100.0%

47.4%
63.4%
50.3%
N/A
3.6%
90.6%
N/A
N/A

As noted above, one aspect of our strategy involves focusing on 
the formation of strategic alliances with certain of our tenants 
from the standpoint of fulfilling their real estate needs in mul-
tiple locations. Many of the tenants on which this strategy con-
centrates are in the United States defense industry. As a result of 
this  strategy,  our  revenue  concentration  from  that  industry 
could continue to grow over time.

We classify the revenue from our leases into industry groupings 
based  solely  on  our  knowledge  of  the  tenants’  operations  in 
leased  space.  Occasionally,  classifications  require  subjective  
and complex judgments. For example, we have a tenant that is 
considered  by  many  to  be  in  the  computer  industry;  however, 
since the nature of that tenant’s operations in the space leased  

3434

from  us  is  focused  on  providing  service  to  the  United  States 
Government’s  defense  department,  we  classify  the  revenue  we 
earn from the lease as United States defense industry revenue. 
We do not use independent sources such as Standard Industrial 
Classification  codes  for  classifying  our  revenue  into  industry 
groupings and if we did, the resulting groupings would be mate-
rially different.

RESULTS OF OPERATIONS

While reviewing this section, you should refer to  the  tables  in 
the section entitled “Selected Financial Data.” You should also 
refer  to  the  section  below  entitled  “Liquidity  and  Capital 
Resources” for certain factors that could negatively affect vari-
ous aspects of our operations.

Occupancy and Leasing
The table below sets forth leasing information pertaining to our 
portfolio of wholly owned operating properties:

Occupancy rates at year end
  Total

 Baltimore/Washington 

Corridor
  Northern Virginia
  Suburban Baltimore
  Suburban Maryland

 St. Mary’s and King George 

Counties

  Greater Philadelphia
  Northern/Central New Jersey
  Colorado Springs, Colorado
  San Antonio, Texas
  Greater Harrisburg

 Renewal rate of square footage  

for scheduled lease expirations 
during year

Average contractual annual 

rental rate per square foot at 
year end(1)

December 31,

2006

2005

2004

92.8%

94.0%

94.3%

95.1%
90.9%
81.1%
83.2%

92.1%
100.0%
97.2%
92.8%
100.0%
N/A

96.2%
96.4%
84.7%
79.8%

95.4%
100.0%
96.4%
85.8%
100.0%
N/A

95.6%
94.5%
91.0%
82.8%

96.9%
100.0%
92.7%
N/A
N/A
85.4%

55.4%

66.6%

71.4%

$20.90

$20.28

$20.32

(1) Includes estimated expense reimbursements.

As  shown  in  the  above  table,  our  portfolio  of  wholly  owned 
properties posted an occupancy rate of approximately 92.8% at 
December  31,  2006,  down  from  a  year  end  occupancy  rate  of 
approximately 94% in 2005 and 2004; this decrease reflects the 
adverse  impact  of  two  large  building  spaces  in  Northern 
Virginia  that  we  have  under  leases  scheduled  to  commence  in  

early 2007. We believe that our occupancy rates have benefited 
in each of the last three years from the expansion of the United 
States  defense  industry  in  our  largest  submarkets.  We  also 
believe  that  these  rates  benefited  from  a  national  economic 
recovery in the real estate industry in 2005 and the stabilization 
that followed in 2006. In addition, our wholly owned property 
rates were impacted by our acquisition activity; acquisitions of 
wholly owned operating properties in 2006 positively impacted 
2006 year end occupancy rates, with such properties carrying a 
weighted  average  occupancy  rate  of  95.1%  at  December  31, 
2006, while 2005 acquisitions adversely affected 2005 year end  
occupancy rates, with such properties carrying a weighted aver-
age occupancy rate of 85.7% at December 31, 2005.

Our renewal rates of square footage for scheduled lease expira-
tions  decreased  in  each  of  the  last  two  years;  the  2006  rate  in 
particular  was  low  in  comparison  to  the  2000  through  2005  
calendar years, when the annual renewal rate ranged from 66% 
to 76% and averaged 70%. The 2006 renewal rate was adversely 
affected by large amounts of space that we knew were not going 
to  be  renewed  when  we  acquired  the  properties,  including 
197,000 square feet in two properties; our renewal rates would 
have been in the low to mid 60% range without the effect of this 
space. While we believe that the ability for us to retain tenants 
at  the  rates  that  we  did  in  the  2000  through  2005  period  is  a 
challenging task, particularly as we continue to grow, we believe 
that our strategy of positioning to be the landlord of choice for 
select  high  quality  tenants  will  enable  us  to  outperform  our 
competitors in tenant retention in the long run.

Our average contractual annual rent per square foot increased 
approximately 3.0% from December 31, 2005 to December 31, 
2006  despite  the  fact  that  acquisitions  completed  during  2006 
had rents per square foot at December 31, 2006 of $14.12, 32% 
below our wholly owned portfolio rate. The increase in this rate 
can  be  attributed  primarily  to  the  effect  of  new  leases  entered 
into  at  a  higher  rate  during  the  year  and  scheduled  increases 
that took place at leases remaining in place. The decrease in our 
average contractual annual rent per square foot from December 
31, 2004 to December 31, 2005 was due primarily to our acqui-
sition in 2005 of properties with rents per square foot that aver-
aged  $15.71  at  December  31,  2005.  The  lower  rent  per  square 
foot on acquisitions in 2006 and 2005 can be attributed primar-
ily  to  the  following:  (1)  lower  rents  in  geographic  areas  where 
certain  acquisitions  took  place;  (2)  lower  costs  for  operating 
expenses and tenant improvements associated with underlying 
leases  in  certain  acquisitions;  and  (3)  lower  rents  associated 
with lower grade space in certain acquisitions.

3535

 
 
 
management’s discussion and analysis of financial condition and results of operations

We believe that there is a fair amount of uncertainty surround-
ing  the  outlook  for  leasing  activity  in  2007.  Certain  key  eco-
nomic indicators, including employment growth, seem to favor 
continued strength in our regions’ real estate markets. However, 
the recent and scheduled addition of new square footage in our 
regions along with continued strong competition from existing 
properties in these regions present challenges to the Company’s 
ability  to  meet  our  2007  leasing  objectives.  As  we  discussed 
above, we believe that our occupancy rates have benefited from 
the expansion of the United States defense industry in our larg-
est submarkets. Reporting by the Base Realignment and Closure 
Commission  of  the  United  States  Congress  favors  continued 
expansion  in  the  regions  in  which  our  properties  are  located.  
However,  while  we  viewed  this  reporting  as  favorable  for  the 
Company’s future leasing outlook, there is uncertainty, partic-
ularly  in  today’s  political  environment,  over  the  level  of  and 
timing of such expansion.

Despite any uncertainty regarding our 2007 leasing outlook, we 
believe that we are somewhat protected in the short run from a 
slow  down  in  leasing  activity  since  the  weighted  average  lease 
term  for  our  wholly  owned  properties  at  December  31,  2006  
was five years. In addition, only 12.4% of our annualized rental 
revenues  at  December  31,  2006  were  from  leases  scheduled  to 
expire  by  the  end  of  2007.  Looking  longer  term,  60.6%  of  our 
annualized rental revenues on leases in place as of December 31, 
2006  were  from  leases  scheduled  to  expire  by  the  end  of  2011, 
with no more than 16% scheduled to expire in any one calendar 
year between 2007 and 2011.

The Nottingham Acquisition will initially have an adverse effect 
on our leasing and occupancy measures. At December 31, 2006, 
the  operating  properties  included  in  the  transaction  were 
approximately  86%  occupied  with  average  rents  per  square  
foot  of  approximately  $17.00.  In  addition,  approximately  one-
third  of  annualized  rental  revenue  at  these  properties  as  of 
December 31, 2006 were from leases scheduled to expire by the 
end of 2007; we expect to renew a majority of the square footage 
scheduled to expire in 2007.

As noted above, most of the leases with our largest tenant, the 
United  States  Government,  provide  for  consecutive  one-year 
terms or provide for early termination rights; all of the leasing 
statistics  set  forth  above  assume  that  the  United  States 
Government  will  remain  in  the  space  that  they  lease  through 
the  end  of  the  respective  arrangements,  without  ending  con-
secutive one-year leases prematurely or exercising early termi-
nation rights. We report the statistics in this manner since we  

manage our leasing activities using these same assumptions and 
believe  these  assumptions  to  be  probable.  Please  refer  to  the 
section  entitled  “Liquidity  and  Capital  Resources”  where  we 
further  discuss  our  leases  with  the  United  States  Government 
and the underlying risks.

The table below sets forth occupancy information pertaining to 
properties in which we have a partial ownership interest:

Ownership
Interest

Occupancy Rates at  
December 31,

2006

2005

2004

50.0%
92.5%
20.0%

47.9%
100.0%(1)
91.2%

47.9% 47.9%
100.0%(1)
N/A
N/A
89.4%

Geographic Region

Suburban Maryland
Northern Virginia
Greater Harrisburg
Northern/Central 

New Jersey

20.0%

N/A(2)

80.9% 84.2%

(1)   Excludes the effect of 62,000 unoccupied square feet undergoing redevelopment 

at year end.

(2)   The property in this geographic region was sold in July 2006.

Revenues from Real Estate Operations and Property  
Operating Expenses
We  typically  view  our  changes  in  revenues  from  real  estate 
operations and property operating expenses as being comprised 
of three main components:

•   Changes attributable to the operations of properties owned 
and  100%  operational  throughout  the  two  years  being 
compared. We define these as changes from “Same-Office 
Properties.” For example, when comparing 2005 and 2006, 
Same-Office  Properties  would  be  properties  owned  and 
100% operational from January 1, 2005 through December 
31, 2006. For further discussion of the concept of “opera-
tional,”  you  should  refer  to  the  section  of  Note  2  of  the 
Consolidated  Financial  Statements  entitled  “Commercial 
Real Estate Properties.”

•   Changes  attributable  to  operating  properties  acquired 
during  the  two  years  being  compared  and  newly- 
constructed  properties  that  were  placed  into  service  and 
not  100%  operational  throughout  the  two  years  being 
compared.  We  define  these  as  changes  from  “Property 
Additions.”

•   Changes  attributable  to  properties  sold  during  the  two 
years  being  compared  that  are  not  reported  as  discon-
tinued operations. We define these as changes from “Sold 
Properties.”

3636

The tables below set forth the components of our changes in revenues from real estate operations and property operating expenses 
from continuing operations (dollars in thousands):

Changes from 2005 to 2006

Property 
Additions
Dollar  
Change(1)

Same-Office 
Properties

Dollar  
Change

Percentage 
Change

Sold  
Properties 
Dollar 
Change(2)

Other 
Dollar 
Change(3)

Total

Revenues from real estate operations
  Rental revenue
  Tenant recoveries and other real estate operations revenue

  Total

Property operating expenses

Straight-line rental revenue adjustments included in  

rental revenue

Amortization of deferred market rental revenue

$51,649
8,232

$  3,839
2,698

$59,881

$  6,537

$20,022

$  4,681

$  5,194

$ (2,068)

$  1,272

$ 

27

Number of operating properties included in component category

53

118

1.9%
9.9%

2.9%

6.8%

N/A

N/A

N/A

$(5,586)
(1,025)

$(1,419)
858

$ 48,483
$ 10,763

$(6,611)

$   (561)

$ 59,246

$(2,259)

$   (193)

$ 22,251

$     (56)

$   (826)

$  2,244

$        —

$     (27)

$  1,272

16

1

188

(1)   Includes 43 acquired properties and ten newly-constructed properties.

(2)   Includes sold properties that are not reported as discontinued operations.

(3)   Includes, among other things, the effects of amounts eliminated in consolidation. Certain amounts eliminated in consolidation are attributable to the Property Additions 

and Same-Office Properties.

Changes from 2004 to 2005

Property 
Additions
Dollar  
Change(1)

Same-Office 
Properties

Dollar  
Change

Percentage 
Change

Sold  
Properties
Dollar 
Change(2)

Other 
Dollar 
Change(3)

Total

Revenues from real estate operations
  Rental revenue
  Tenant recoveries and other real estate operations revenue

$34,228
4,088

$ (1,678)
4,332

(1.1)%
22.5%

$(1,991)
(257)

$(1,409)
816

$ 29,150
$  8,979

  Total

$38,316

$  2,654

1.5%

$(2,248)

$   (593)

$ 38,129

Property operating expenses

$  9,954

$  5,344

10.5%

$   (691)

$(1,336)

$ 13,271

Straight-line rental revenue adjustments included in  

rental revenue

Amortization of deferred market rental revenue

$  2,968

$ (4,913)

$     240

$  (451)

Number of operating properties included in component category

65

93

N/A

N/A

N/A

$       238

$       (4)

$ (1,711)

$        —

$   (294)

$  (505)

16

1

175

(1)   Includes 58 acquired properties and seven newly-constructed properties.

(2)   Includes sold properties that are not reported as discontinued operations.

(3)   Includes, among other things, the effects of amounts eliminated in consolidation. Certain amounts eliminated in consolidation are attributable to the Property Additions 

and Same-Office Properties.

3737

 
 
management’s discussion and analysis of financial condition and results of operations

The analysis set forth below in this section pertains to proper-
ties included in continuing operations.

•   the change in rental revenue from the Same-Office Prop-

erties from 2004 to 2005 included the following:

As the tables above indicate, our total increase in revenues from 
real  estate  operations  and  property  operating  expenses  from 
2005 to 2006 and from 2004 to 2005 was attributable primarily 
to the Property Additions.

The real estate operations in 2005 and 2006 associated with our 
property  additions  were  adversely  affected  somewhat  by  our 
2005  acquisitions  carrying  occupancy  rates  that  were  lower 
than  the  average  occupancy  rate  of  our  previously  existing 
properties.  Acquisitions  in  2005  with  particularly  low  occu-
pancy  rates  upon  acquisition  included  the  following:  (1)  a  1.1 
million  square  foot  portfolio  acquired  in  December  2005  that 
has had an occupancy rate averaging approximately 80% since 
its  acquisition;  (2)  a  118,000  square  foot  property  acquired  in 
October 2005 that has been 58% occupied since its acquisition 
through the end of 2006; and (3) a 113,000 square foot property 
acquired in April 2005 that was 23% occupied from its acquisi-
tion  until  December  2005,  when  it  became  100%  operational. 
We  occasionally  acquire  lower  occupancy  properties  such  as 
these for what we view to be the potential for particularly high 
rates of return on our investment in these properties if we are 
successful in stabilizing their operations.

With regard to changes in the Same-Office Properties’ revenues 
from real estate operations:

•   the  increase  in  rental  revenue  from  the  Same-Office 

Properties from 2005 to 2006 included the following:

•   an increase of $2.6 million, or 1.4%, in rental revenue 
from  the  Same-Office  Properties  attributable  primar-
ily  to  changes  in  occupancy  and  rental  rates  between 
the two periods; and

•   an  increase  of  $1.2  million,  or  26.8%,  in  net  revenue 
from the early termination of leases. To explain further 
the  term  net  revenue  from  the  early  termination  of 
leases,  when  tenants  terminate  their  lease  obligations 
prior  to  the  end  of  the  agreed  lease  terms,  they  typi-
cally pay fees to break these obligations. We recognize 
such fees as revenue and write off against such revenue 
any (1) deferred rents receivable and (2) deferred reve-
nue and deferred assets that are amortizable into rental 
revenue  associated  with  the  leases;  the  resulting  net 
amount is the net revenue from the early termination 
of the leases.

•   a  decrease  of  $6.4  million,  or  66.2%,  in  net  revenue 
from the early termination of leases, which was attrib-
utable primarily to two properties; and

•   an  increase  of  $4.7  million,  or  3.2%,  attributable  to 
changes in occupancy and rental rates between the two 
periods; and

•   tenant recoveries and other revenue from the Same-Office 
Properties increased from 2005 to 2006 and from 2004 to 
2005  due  primarily  to  the  increase  in  property  operating 
expenses  described  below.  While  we  do  have  some  lease 
structures  under  which  tenants  pay  for  100%  of  proper-
ties’  operating  expenses,  our  most  prevalent  lease  struc-
ture is for tenants to pay for a portion of property operating 
expenses to the extent that such expenses exceed amounts 
established in their respective leases that are based on his-
torical expense levels. As a result, while there is an inher-
ent direct relationship between our tenant recoveries and 
property  operating  expenses,  this  relationship  does  not 
result in a dollar for dollar increase in tenant recoveries as 
property operating expenses increase.

With regard to changes in the Same-Office Properties’ property 
operating expenses:

•   the increase in the Same-Office Properties’ property oper-
ating expenses from 2005 to 2006 included the following:

•   an  increase  of  $2.0  million,  or  13.3%,  in  utilities  due 
primarily  to  (1)  rate  increases  that  we  believe  are  the 
result of (a) increased oil prices and (b) energy deregu-
lation in Maryland and (2) our assumption of respon-
sibility  for  payment  of  utilities  at  certain  properties 
due to changes in occupancy and lease structure;

•   an  increase  of  $1.3  million,  or  10.3%,  in  real  estate 
taxes  reflecting  primarily  an  increase  in  the  assessed 
value of many of our properties;

•   an increase of $651,000, or 8.5%, in repairs and main-
tenance  labor  due  in  large  part  to  higher  labor  hour 
rates resulting from an increase in the underlying costs 
for  labor.  The  higher  labor  rates  were  attributable  in 
part to an inflationary trend but also to the increased 
need  for  us  to  employ  individuals  with  specialized 
skills who command higher rates;

3838

•   an increase of $548,000, or 6.1%, in cleaning expenses 
due primarily to (1) increased rates for services at cer-
tain  of  our  properties  requiring  specialized  services 
and  (2)  our  assumption  of  responsibility  for  payment 
of  such  costs  at  certain  properties  due  to  changes  in 
occupancy and lease structures;

•   an increase of $528,000, or 24.1%, in grounds mainte-
nance due in large part to increased parking lot main-
tenance projects undertaken in the current period;

•   an increase of $353,000, or 42.5%, in electric expense, 
$154,000  of  which  pertained  to  one  property  which 
had a large repair project take place; and

•   a decrease of $1.6 million, or 69.1%, due to decreased 
snow  removal  expenses  due  to  less  snow  and  ice  pre-
cipitation in 2006.

•   the increase in the Same-Office Properties’ property oper-
ating expenses from 2004 to 2005 included the following:

•   an  increase  of  $3.7  million,  or  43.6%,  in  utilities  due 
again primarily to (1) changes in occupancy and lease 
structures and (2) rate increases;

•   an  increase  of  $915,000,  or  84.4%,  in  snow  removal 
expense  due  to  greater  snow  and  ice  precipitation  in 
2005; and

•   an increase of $572,000, or 8.2%, in building cleaning 
expenses due primarily to our assumption of responsi-
bility  for  payment  of  such  costs  at  certain  properties 
due to changes in occupancy and lease structure.

Construction Contract and Other Service Revenues and Expenses
The table below sets forth changes in our construction contract and other service revenues and expenses:

Changes from 2005 to 2006

Changes from 2004 to 2005

Construction 
Contract 
Dollar Change

Other Service 
Operations 
Dollar Change

Total 
Dollar 
Change

Construction 
Contract  
Dollar Change

Other Service 
Operations 
Dollar Change

Total 
Dollar 
Change

Service operations
  Revenues
  Expenses

Income from service operations

$(22,175)
(22,573)

$         398

$3,025
2,631

$   394

$(19,150)
(19,942)

$ 

792

$49,339
48,801

$     538

$   992
1,490

$    (498)

$ 50,331
50,291

$ 

40

We  use  the  net  amount  of  service  operations  revenues  over 
related  expenses  to  evaluate  performance.  We  believe  that  the 
changes in net amounts reflected above were not significant.

Construction  contract  revenues  were  significantly  higher  in 
2005 compared to 2006 and 2004 due primarily to a large vol-
ume of activity for certain existing contracts in 2005. It is note-
worthy that our revenue from construction contract activity is 
highly  concentrated,  with  five  contracts  representing  approxi-
mately 81% of our 2006 construction contract revenue and four 
contracts representing approximately 81% of our construction 
contract revenue in 2005.

Other service operations revenue increased 62.0% from 2005 to 
2006 due primarily to a higher volume of work for heating and 
air  conditioning  controls  and  plumbing.  Much  of  the  revenue 
contributing to this increase was attributable to one client rela-
tionship.  We  do  not  expect  revenue  from  other  service  opera-
tions to increase in the future and it may in fact decrease.

Depreciation and Amortization
Our  increase  in  depreciation  and  other  amortization  expense 
from 2005 to 2006 was due primarily to a $19.7 million increase 

attributable to the Property Additions, offset in part by a $1.6 
million decrease attributable to the absence of depreciation and 
amortization  in  2006  on  the  Harrisburg  portfolio  due  to  its 
contribution  into  an  unconsolidated  real  estate  joint  venture  
in September 2005.

Our  increase  in  depreciation  and  other  amortization  expense 
from 2004 to 2005 was due primarily to a $9.7 million increase 
attributable  to  the  Property  Additions  and  a  $2.1  million,  or 
4.9%, increase attributable to the Same-Office Properties.

General and Administrative Expenses
General and administrative expenses increased as a percentage 
of operating income from 12.6% in 2004 to 13.9% in 2005 and 
to  14.9%  in  2006.  Much  of  this  trend  can  be  attributed  to  an 
increase  in  the  size  of  our  employee  base  in  response  to  the  
continued  growth  of  the  Company.  We  expect  this  trend  to 
continue in the next one to two years and perhaps longer until 
we determine that the Company’s employee base and processes 
are  positioned  appropriately  in  anticipation  of  our  future 
growth expectations.

3939

 
 
management’s discussion and analysis of financial condition and results of operations

The increase in general and administrative expense from 2005 
to  2006  was  attributable  primarily  to  an  increase  of  $2.5  mil-
lion,  or  21.5%,  in  compensation  expense  due  to  the  increased 
number of employees, increased salaries and bonuses for exist-
ing employees and increased expense associated with employee 
stock  options  attributable  to  our  adoption  of  SFAS  123(R)  on 
January 1, 2006.

The increase in general and administrative expense from 2004 
to  2005  was  attributable  primarily  to  an  increase  of  $2.2  mil-
lion,  or  23.3%,  in  compensation  expense  due  to  the  increased 
number  of  employees,  increased  expenses  associated  with 
employee  restricted  share  grants  and  increased  salaries  and 
bonuses for existing employees.

Interest Expense and Amortization of Deferred Financing Costs
Our  interest  expense  and  amortization  of  deferred  financing 
costs included in continuing operations increased $17.1 million, 
or 30.0%, from 2005 to 2006. This increase included the effects 
of the following:

•   a 20.7% increase in our average outstanding debt balance, 
resulting  primarily  from  our  2005  and  2006  acquisition 
and construction activities;

•   an  increase  in  our  weighted  average  interest  rates  from 

5.8% to 6.2%; and

•   a  partial  offset  attributable  to  a  $4.7  million  increase  
in  interest  capitalized  to  construction  and  development  
projects  due  to  increased  construction  and  development 
activity.

Our  interest  expense  and  amortization  of  deferred  financing 
costs  included  in  continuing  operations  increased  $12.5  mil-
lion, or 28.1%, from 2004 to 2005. This increase is due primar-
ily to a 33.4% increase in our average outstanding debt balance 
resulting  primarily  from  our  2004  and  2005  acquisition  and 
construction activities, offset in part by a $4.8 million increase 
in  interest  capitalized  to  construction  and  development  proj-
ects due to increased construction and development activity.

Interest expense and deferred financing costs as a percentage of 
net operating income increased from 51.4% in 2004 to 58.8% in 
2005 and to 65.2% in 2006 due in large part to a higher propor-
tion  of  our  investing  and  financing  activities  having  been 
funded  by  debt  versus  equity  and  the  reasons  discussed  above 
for the changes in interest expense.

We  historically  have  financed  our  long-term  capital  needs, 
including  property  acquisition  and  development  activities, 
through a combination of the following:

•   borrowings under our Revolving Credit Facility;

•   borrowings from new debt;

•   issuances  of  common  shares,  preferred  shares  and  
common  units  and/or  preferred  units  in  our  Operating 
Partnership;

•   contributions from outside investors into real estate joint 

ventures;

•   proceeds from sales of real estate; and

•   any available residual cash flow from operations.

Many  factors  go  into  our  decisions  regarding  when  to  finance 
investing and financing activities using debt versus equity. We 
generally use long-term borrowing as attractive financing con-
ditions  arise  and  equity  issuances  as  attractive  equity  market 
conditions  arise.  As  a  result,  the  change  in  the  proportion  of 
our  investing  and  financing  activities  funded  by  debt  versus 
equity  described  above  is  not  a  trend  that  necessarily  should  
be expected to continue.

As  of  December  31,  2006,  93.1%  of  our  fixed-rate  debt  was 
scheduled to mature after 2007. As of December 31, 2006, 11.7% 
of our total debt had variable interest rates, including the effect 
of  interest  rate  swaps.  For  a  more  comprehensive  presentation 
of  our  fixed-rate  loan  maturities,  please  refer  to  the  section 
below entitled “Quantitative and Qualitative Disclosures About 
Market Risk.”

Minority Interests
Interests in our Operating Partnership are in the form of pre-
ferred and common units. The line entitled “minority interests 
in  income  from  continuing  operations”  includes  primarily 
income before continuing operations allocated to preferred and 
common  units  not  owned  by  us;  for  the  amount  of  this  line 
attributable to preferred units versus common units, you should 
refer  to  our  Consolidated  Statements  of  Operations.  Income  
is  allocated  to  minority  interest  preferred  unitholders  in  an 
amount  equal  to  the  priority  return  from  the  Operating 
Partnership  to  which  they  are  entitled.  Income  is  allocated  to 
minority  interest  common  unitholders  based  on  the  income 
earned  by  the  Operating  Partnership  after  allocation  to  pre-
ferred unitholders multiplied by the percentage of the common 
units  in  the  Operating  Partnership  owned  by  those  common 
unitholders.

4040

As of December 31, 2006, we owned 95.6% of the outstanding 
preferred  units  and  82.8%  of  the  outstanding  common  units. 
The percentage of the Operating Partnership owned by minor-
ity interests during the last three years decreased in the aggre-
gate due primarily to the effect of the following transactions:

•   the issuance of additional units to us as we issued new pre-
ferred  shares  and  common  shares  during  2004  through 
2006  due  to  the  fact  that  we  receive  preferred  units  and 
common units in the Operating Partnership each time we 
issue preferred shares and common shares;

•   the exchange of common units for our common shares by 

certain minority interest holders of common units;

•   our  redemption  of  the  Series  B  Cumulative  Redeemable 
Preferred  Shares  of  beneficial  interest  (the  “Series  B  Pre-
ferred Shares”) in July 2004;

•   our  issuance  of  common  units  to  third  parties  totaling 
181,097  in  2006  and  232,655  in  2005  in  connection  with 
acquisitions;

•   our issuance of the Series I Preferred Units to a third party 
in 2004 (as discussed in Note 2 to the Consolidated Finan-
cial Statements); and

•   the redemption by us of the Series E and Series F Preferred 

Shares in 2006.

Our income allocated to minority interest holders of preferred 
units  increased  from  2004  to  2005  due  to  our  issuance  of  the 
Series  I  Preferred  Units  in  September  2004.  Our  income  from 
continuing operations allocated to minority interest holders of 
common units decreased from 2004 to 2005 and from 2005 to 
2006  due  primarily  to  our  increasing  ownership  of  common 
units (from 75% at December 31, 2003 to 83% at December 31, 
2006) and preferred units.

Income from Discontinued Operations
Our  income  from  discontinued  operations  increased  from  
2005 to 2006 and from 2004 to 2005 due primarily to increased 
gain from sales of properties. See Note 18 to the Consolidated 
Financial Statements for a summary of income from discontin-
ued operations.

Adjustments to Net Income to Arrive at Net Income Available 
to Common Shareholders
Preferred  share  dividends  increased  from  2005  to  2006  due  
to  the  additional  dividends  attributable  to  the  newly  issued 
Series  J  Preferred  Shares  exceeding  the  decrease  in  dividends 
attributable  to  the  redemption  of  the  Series  E  and  Series  F 
Preferred  Shares.  Preferred  share  dividends  decreased  from 
2004  to  2005  due  primarily  to  the  redemption  of  the  Series  B 
Preferred Shares.

In  2006,  we  recognized  a  $3.9  million  decrease  to  net  income 
available  to  common  shareholders  pertaining  to  the  original 
issuance  costs  incurred  on  the  Series  E  and  Series  F  Preferred 
Shares  redeemed  during  the  year.  In  2004,  we  recognized  a  
$1.8 million decrease to net income available to common share-
holders  pertaining  to  the  original  issuance  costs  incurred  on 
the Series B Preferred Shares redeemed during the year.

Diluted Earnings per Common Share
Diluted earnings per common share on net income available to 
common  shareholders  increased  both  from  2005  to  2006  and 
from 2004 to 2005 due to the effects of increases in net income 
available to common shareholders, attributable primarily to the 
reasons set forth above, offset somewhat by the higher numbers 
of  common  shares  outstanding  due  to  share  issuances  from 
2004 to 2006.

LIQUIDITY AND CAPITAL RESOURCES

In  our  discussion  of  liquidity  and  capital  resources  set  forth 
below, we describe certain of the risks and uncertainties relat-
ing  to  our  business.  However,  they  may  not  be  the  only  ones 
that we face.

Cash and Cash Equivalents
Our cash and cash equivalents balance as of December 31, 2006 
totaled  $7.9  million,  a  decrease  of  26.5%  from  the  balance  as  
of December 31, 2005. The balance of cash and cash equivalents 
that we carried as of the end of each of the eight calendar quar-
ters during the two years ended December 31, 2006 ranged from 
$5.7  million  to  $21.5  million  and  averaged  $12.6  million.  The 
cash and cash equivalents balances that we carry as of a point  
in time can vary significantly due in part to the inherent vari-
ability  of  the  cash  needs  of  our  acquisition  and  development 
activities. We maintain sufficient cash and cash equivalents to 
meet our operating cash requirements and short-term investing 
and  financing  cash  requirements.  When  we  determine  that  
the amount of cash and cash equivalents on hand is more than  
we  need  to  meet  such  requirements,  we  may  pay  down  our 
Revolving  Credit  Facility  or  forgo  borrowing  under  construc-
tion loan credit facilities to fund development activities.

Operating Activities
We generate most of our cash from the operations of our prop-
erties. A review of our Consolidated Statements of Operations 
indicates  that  over  the  last  three  years,  approximately  29%  to 
31% of our revenues from real estate operations (defined as the 
sum  of  (1)  rental  revenue  and  (2)  tenant  recoveries  and  other 
real estate operations revenue) were used for property operating 
expenses. Most of the amount by which our revenues from real 
estate  operations  exceeded  property  operating  expenses  was 
cash  flow;  we  applied  most  of  this  cash  flow  towards  interest  

4141

management’s discussion and analysis of financial condition and results of operations

expense,  scheduled  principal  amortization  on  debt,  dividends 
to  our  shareholders,  distributions  to  minority  interest  holders 
of  preferred  and  common  units  in  the  Operating  Partnership, 
capital improvements and leasing costs for our operating prop-
erties and general and administrative expenses.

affect the ability of our tenants in the defense industry to 
fulfill  lease  obligations  or  decrease  the  likelihood  that 
these  tenants  will  renew  their  leases.  In  the  case  of  the 
United  States  Government,  a  reduction  in  government 
spending could result in the early termination of leases.

Our cash flow from operations determined in accordance with 
GAAP  increased  $17.2  million,  or  17.9%,  from  2005  to  2006; 
this  increase  is  attributable  primarily  to  the  additional  cash 
flow  from  operations  generated  by  our  newly-acquired  and 
newly-constructed  properties.  We  expect  to  continue  to  use 
cash flow provided by operations to meet our short-term capi-
tal  needs,  including  all  property  operating  expenses,  general 
and administrative expenses, interest expense, scheduled prin-
cipal  amortization  of  debt,  dividends  and  distributions  and 
capital  improvements  and  leasing  costs.  We  do  not  anticipate 
borrowing  to  meet  these  requirements.  Factors  that  could  
negatively  affect  our  ability  to  generate  cash  flow  from  opera-
tions in the future include the following:

•   We earn revenue from renting our properties. Our operat-
ing costs do not necessarily fluctuate in relation to changes 
in our rental revenue. This means that our costs will not 
necessarily  decline  and  may  increase  even  if  our  revenue 
declines.

•   For new tenants or upon lease expiration for existing ten-
ants, we generally must make improvements and pay other 
tenant related costs for which we may not receive increased 
rents. We also may make building related capital improve-
ments for which tenants may not reimburse us.

•   When  leases  for  our  properties  expire,  our  tenants  may 
not renew or may renew on terms less favorable to us than 
the terms of their original leases. If a tenant leaves, we can 
expect to experience a vacancy for some period of time as 
well as higher tenant improvement and leasing costs than 
if a tenant renews. As a result, our financial performance 
could be adversely affected if we experience a high volume 
of tenant departures at the end of their lease terms.

•   As discussed earlier, we are dependent on a highly concen-
trated number of tenants for a large percentage of our rev-
enue. Most of the leases of one of these tenants, the United 
States Government, provide for a series of one-year terms 
or  provide  for  early  termination  rights.  Our  cash  flow 
from operations would be adversely affected if our larger 
tenants  failed  to  make  rental  payments  to  us,  or  if  the 
United  States  Government  elects  to  terminate  several  of  
its  leases  and  the  affected  space  cannot  be  re-leased  on  
satisfactory terms.

•   As discussed earlier, a high concentration of our revenues 
comes from tenants in the United States defense industry. 
A  reduction  in  government  spending  for  defense  could 

4242

•   Our  performance  depends  on  the  ability  of  our  tenants  
to  fulfill  their  lease  obligations  by  paying  their  rental  
payments in a timely manner. In addition, as noted above, 
we rely on a relatively small number of tenants for a large 
percentage  of  our  revenue  from  real  estate  operations.  If 
one of our major tenants or a number of our smaller ten-
ants  were  to  experience  financial  difficulties,  including 
bankruptcy,  insolvency  or  general  downturn  of  business, 
there  could  be  an  adverse  effect  on  our  results  of  opera-
tions and financial condition.

•   We  provide  construction  management  services  for  third-
party  clients.  When  providing  these  services,  we  usually 
pay for the costs of construction and subsequently bill our 
clients  for  the  costs  of  construction  plus  a  construction 
management  fee.  When  we  provide  construction  man-
agement  services,  the  costs  of  construction  can  amount  
to  millions  of  dollars.  If  any  of  our  clients  for  these  
services  fail  to  reimburse  us  for  costs  incurred  under  a  
significant  construction  management  contract,  it  could 
have  an  adverse  effect  on  our  results  of  operations  and 
financial condition.

•   Since  our  properties  are  primarily  located  in  the  Mid-
Atlantic  region  of  the  United  States,  especially  in  the 
Greater  Washington,  D.C.  region,  and  are  also  typically 
concentrated in office parks in which we own most of the 
properties, we do not have a broad geographic distribution 
of  our  properties.  As  a  result,  a  decline  in  the  real  estate 
market or general economic conditions in the Mid-Atlantic 
region, the Greater Washington, D.C. region or the office 
parks  in  which  our  properties  are  located  could  have  an 
adverse  effect  on  our  financial  position,  results  of  opera-
tions and cash flows.

•   The  commercial  real  estate  market  is  highly  competitive. 
We compete for the purchase of commercial property with 
many entities, including other publicly traded commercial 
REITs. Many of our competitors have substantially greater 
financial resources than we do. If our competitors prevent 
us  from  buying  properties  that  we  target  for  acquisition, 
we may not be able to meet our property acquisition and 
development  goals.  Moreover,  numerous  commercial 
properties compete for tenants with our properties. Some 
of the properties competing with ours may have newer or 
more  desirable  locations  or  the  competing  properties’ 
owners  may  be  willing  to  accept  lower  rates  than  are 
acceptable to us. Competition for property acquisitions, or 

for  tenants  in  properties  that  we  own,  could  have  an 
adverse effect on our financial performance.

•   $2.4 million using an escrow funded by proceeds from one 

of our property sales discussed below; and

•   If  short-term  interest  rates  were  to  increase,  the  interest 
payments  on  our  variable-rate  debt  would  increase, 
although  this  increase  may  be  reduced  to  the  extent  that 
we  have  interest  rate  swap  and  cap  agreements  outstand-
ing. If longer-term interest rates were to increase, we may 
not  be  able  to  refinance  our  existing  indebtedness  on 
terms  as  favorable  as  the  terms  of  our  existing  indebted-
ness and we would pay more for interest expense on new 
indebtedness that we incur for future property additions.

•   Our  portfolio  of  properties  is  insured  for  losses  under  
our  property,  casualty  and  umbrella  insurance  policies 
through September 2007. These policies include coverage 
for  acts  of  terrorism.  Although  we  believe  that  we  ade-
quately  insure  our  properties,  we  are  subject  to  the  risk 
that our insurance may not cover all of the costs to restore 
properties damaged by a fire or other catastrophic event. 
In addition, changes in the insurance industry could occur 
in  the  future  that  may  increase  the  cost  of  insuring  our 
properties  and  decrease  the  scope  of  insurance  coverage, 
either  of  which  could  adversely  affect  our  financial  posi-
tion and operating results.

•   As a REIT, we must distribute at least 90% of our annual 
taxable income (excluding capital gains), which limits the 
amount of cash we have available for other business pur-
poses,  including  amounts  to  fund  our  growth.  Also,  it  is 
possible that because of the differences between the time 
that  we  actually  receive  revenue  or  pay  expenses  and  the 
period we report those items for distribution purposes, we 
may  have  to  borrow  funds  on  a  short-term  basis  to  meet 
the  90%  distribution  requirement.  We  may  become  sub-
ject  to  tax  liabilities  that  adversely  affect  our  operating 
cash flow.

Investing and Financing Activities During the Year Ended 
December 31, 2006
In our primary geographic regions, we acquired six office prop-
erties totaling 1.0 million square feet, a building to be redevel-
oped totaling 74,749 square feet and seven parcels of land that 
we believe can support up to 2.3 million developable square feet 
for $169.7 million. These acquisitions were financed using the 
following:

•   $93.4  million  in  borrowings  under  our  Revolving  Credit 

Facility;

•   $37.5 million from an assumed mortgage loan;

•   $7.5  million  from  the  issuance  of  common  units  in  the 

Operating Partnership;

•   cash reserves for the balance.

Highlights of these acquisitions include the following:

•   we  acquired  a  611,379  square  foot  building  and  land  
parcels  that  we  believe  can  support  up  to  1.4  million  
developable  square  feet  in  the  Baltimore/Washington 
Corridor; and

•   after making our initial entry in San Antonio, Texas and 
Colorado  Springs  in  2005,  we  added  to  our  positions  in 
each  of  these  regions  by  acquiring  land  parcels  in  each  
of  these  regions  and  five  operational  properties  totaling 
400,000  square  feet  and  a  74,749  square  foot  redevelop-
ment property in Colorado Springs.

We  also  acquired  approximately  500  acres  of  the  591-acre  for-
mer  Fort  Ritchie  United  States  Army  base  located  in  Cascade, 
Washington County, Maryland for a value of $5.6 million using 
an initial cash outlay of $2.5 million, and expect to acquire the 
remaining 91 acres in 2007. The 591-acre parcel is anticipated to 
accommodate  a  total  of  1.7  million  square  feet  of  office  space 
and  673  residential  units,  including  approximately  306,000 
square  feet  of  existing  office  space  and  110  existing  rentable 
residential  units,  with  development  expected  to  occur  over  a 
period of 10 to 15 years. In connection with the aggregate acqui-
sition,  we  expect  to  initially  make  the  following  future  cash 
payments to the seller: (1) $465,000 in 2007 in connection with 
the acquisition of the remaining 91 acres; and (2) an additional 
$2.0 million over the period from 2007 through 2009. We could 
incur an additional cash obligation to the seller after that of up 
to  $4.0  million;  this  obligation  is  subject  to  reduction  by  an 
amount  ranging  between  $750,000  and  $4.0  million,  with  the 
amount  of  such  reduction  to  be  determined  based  on  defined 
levels of (1) job creation resulting from the future development 
of  the  property  and  (2)  future  real  estate  taxes  generated  by  
the  property.  We  are  also  obligated  under  the  terms  of  the 
acquisition agreement to incur $7.5 million in development and 
construction costs for the property by 2011.

In  addition,  we  acquired,  using  cash  reserves,  the  following 
properties through joint venture structures:

•   a  land  parcel  located  in  the  Baltimore /Washington 
Corridor,  with  a  value  upon  our  acquisition  of  approxi-
mately $4.6 million, through Commons Office 6-B, LLC, 
a  50%  owned  consolidated  joint  venture  constructing  an 
office property totaling approximately 44,000 square feet. 
Our initial cash investment in this joint venture was $1.6 
million; and

4343

management’s discussion and analysis of financial condition and results of operations

•   a  153-acre  parcel  of  land  located  near  the  Indian  Head 
Naval  Surface  War  Center  in  Charles  County,  Maryland, 
with a value upon our acquisition of $2.9 million, through 
COPT-FD  Indian  Head,  LLC,  a  75%  owned  consolidated 
joint venture. Our initial cash investment in this joint ven-
ture was $2.2 million.

As part of our core customer expansion strategy, we also entered 
into  lease  agreements  with  Northrop  Grumman  Corporation  
to  develop  two  data  and  call  centers  totaling  296,000  square 
feet. The terms of these lease agreements call for the land par-
cels on which the centers are being developed to be conveyed to 
us for no cash payment other than closing costs. One of these 
centers is located in Greater Richmond, Virginia and the other 
in  Southwest  Virginia.  The  land  parcel  in  Greater  Richmond, 
Virginia  was  conveyed  to  us  in  2006  and  we  expect  the  land 
parcel in Southwest Virginia to be conveyed in 2007.

We  had  seven  newly-constructed  properties  totaling  866,000 
square feet become fully operational in 2006. These properties, 
which were 94.6% leased in the aggregate at December 31, 2006, 
were located in the following geographic regions: four proper-
ties  totaling  532,000  square  feet  in  the  Baltimore/Washington 
Corridor; one property totaling 223,610 square feet in Northern 
Virginia; one property totaling 50,000 square feet in Colorado 
Springs;  and  one  property  totaling  60,029  square  feet  in  St. 
Mary’s  County,  Maryland.  Costs  incurred  on  these  properties 
through December 31, 2006 totaled $144.2 million, $30.6 mil-
lion of which was incurred in 2006. We financed the 2006 costs 
using  primarily  borrowings  under  existing  construction  loan 
facilities and proceeds from our Revolving Credit Facility.

At December 31, 2006, we had construction activities underway 
on eight office properties totaling 831,000 rentable square feet 
that were 79.5% pre-leased, including 68,196 square feet already 
placed  into  service  in  a  partially  operational  property.  One  of 
these properties is owned through a consolidated joint venture 
in which we have a 50% interest. Six of these properties totaling 
535,000  square  feet  are  located  in  our  primary  geographic 
regions,  including  four  properties  totaling  452,000  square  feet 
in  the  Baltimore/Washington  Corridor,  and  the  other  two 
properties  totaling  296,000  square  feet  are  the  Northrop 
Grumman  Corporation  data  and  call  centers  in  Virginia  dis-
cussed  above.  Costs  incurred  on  these  properties  through 
December  31,  2006  totaled  approximately  $194.0  million,  of 
which  approximately  $79.1  million  was  incurred  in  2006.  We 
have construction loan facilities in place totaling $73.7 million 
to  finance  the  construction  of  four  of  these  properties;  bor-
rowings  under  these  facilities  totaled  $52.4  million  at  Decem-
ber  31,  2006,  $43.8  million  of  which  was  borrowed  in  2006.  
The  remaining  costs  incurred  in  2006  were  funded  using  
primarily  borrowings  from  our  Revolving  Credit  Facility  and 
cash reserves.

The  table  below  sets  forth  the  major  components  of  our  
additions  to  the  line  entitled  “Total  Commercial  Real  Estate 
Properties”  on  our  Consolidated  Balance  Sheet  for  2006  (in 
thousands):

Acquisitions
Construction and development
Capital improvements on operating properties
Tenant improvements on operating properties

$166,416
132,565
20,767
20,414(1)

$340,162

(1)   Tenant improvement costs incurred on newly-constructed properties are classi-

fied in this table as construction and development.

We sold the following during 2006:

•   seven  operational  properties  totaling  531,000  square  feet,  
a newly-constructed property and a land parcel for a total 
of $83.0 million, resulting in recognized gain of $17.3 mil-
lion.  The  net  proceeds  from  these  sales  after  transaction 
costs totaled $80.4 million. We used $36.1 million of these 
proceeds  to  fund  escrows  to  be  applied  towards  future 
acquisitions and $4.8 million to repay a mortgage loan on 
a  property  and  applied  most  of  the  balance  to  pay  down 
our Revolving Credit Facility; and

•   a  157,394  square  foot  property,  which  was  owned  by  an 
unconsolidated real estate joint venture in which we had a 
20%  interest,  for  $27.0  million,  resulting  in  a  recognized 
gain  to  us  of  $563,000.  The  net  proceeds  to  us  from  this 
transaction were approximately $1.5 million.

On  September  18,  2006,  the  Operating  Partnership  issued  a 
$200.0 million aggregate principal amount of 3.50% Exchange-
able Senior Notes due 2026. Interest on the notes is payable on 
March  15  and  September  15  of  each  year.  The  notes  have  an 
exchange  settlement  feature  that  provides  that  the  notes  may, 
under  certain  circumstances,  be  exchangeable  for  cash  (up  to 
the  principal  amount  of  the  notes)  and,  with  respect  to  any 
excess exchange value, may be exchangeable into (at our option) 
cash,  our  common  shares  or  a  combination  of  cash  and  our 
common  shares  at  an  exchange  rate  (subject  to  adjustment)  
of  18.4284  shares  per  $1,000  principal  amount  of  the  notes 
(exchange rate is as of December 31, 2006 and is equivalent to 
an  exchange  price  of  $54.30  per  common  share).  On  or  after 
September 20, 2011, the Operating Partnership may redeem the 
notes in cash in whole or in part. The holders of the notes have 
the right to require us to repurchase the notes in cash in whole 
or  in  part  on  each  of  September  15,  2011,  September  15,  2016 
and  September  15,  2021,  or  in  the  event  of  a  “fundamental 
change,”  as  defined  under  the  terms  of  the  notes,  for  a  repur-
chase price equal to 100% of the principal amount of the notes 
plus accrued and unpaid interest. Prior to September 11, 2011, 
subject  to  certain  exceptions,  if  (1)  a  “fundamental  change” 
occurs  as  a  result  of  certain  forms  of  transactions  or  series  of 

4444

transactions and (2) a holder elects to exchange its notes in con-
nection with such “fundamental change,” we will increase the 
applicable exchange rate for the notes surrendered for exchange 
by  a  number  of  additional  shares  of  our  common  shares  as  a 
“make whole premium.” The notes are general unsecured senior 
obligations  of  the  Operating  Partnership  and  rank  equally  in 
right of payment with all other senior unsecured indebtedness 
of the Operating Partnership. The Operating Partnership’s obli-
gations under the notes are fully and unconditionally guaran-
teed by us. We used the $195.7 million in net proceeds available 
after transaction costs from this issuance as follows:

•   $134.0 million to pay down borrowings under our Revolv-

ing Credit Facility;

•   $52.5 million to repay other debt; and

•   applied the balance to cash reserves.

On  December  28,  2006,  we  borrowed  $146.5  million  under  a 
mortgage loan with a 10-year term at a fixed rate of 5.43%. We 
used the proceeds from this loan to pay down borrowings under 
our Revolving Credit Facility.

During 2006, we entered into three interest rate swaps to hedge 
the risk of changes in interest rates on certain of our one-month 
LIBOR-based  variable  rate  borrowings  until  their  respective 
maturities,  information  for  which  is  set  forth  below  (dollars  
in thousands):

Nature of 
Derivative

Notional 
Amount

One-Month 
LIBOR Base

Effective 
Date

Expiration 
Date

Interest rate swap
Interest rate swap
Interest rate swap

$50,000
  25,000
  25,000

5.0360% 3/28/2006
5.2320%   5/1/2006
5.2320%   5/1/2006

3/30/2009
  5/1/2009
  5/1/2009

During 2006, we completed the following sales of equity:

•   2.0  million  common  shares  in  April  2006  to  an  under-
writer  at  a  net  price  of  $41.31  per  share  for  net  proceeds  
of $82.4 million. We contributed the net proceeds to our 
Operating  Partnership  in  exchange  for  2.0  million  com-
mon units. The proceeds were used primarily to pay down 
our Revolving Credit Facility.

•   3,390,000  Series  J  Preferred  Shares  on  July  20,  2006  at  a 
price of $25.00 per share for net proceeds of $81.9 million. 
These  shares  are  nonvoting  and  redeemable  for  cash  at 
$25.00  per  share  at  our  option  on  or  after  July  20,  2011. 
Holders  of  these  shares  are  entitled  to  cumulative  divi-
dends, payable quarterly (as and if declared by the Board 
of  Trustees).  Dividends  accrue  from  the  date  of  issue  at  
the  annual  rate  of  $1.90625  per  share,  which  is  equal  to 

7.625% of the $25.00 per share redemption price. We con-
tributed  the  net  proceeds  from  the  sale  to  our  Operating 
Partnership  in  exchange  for  3,390,000  Series  J  Preferred 
Units.  The  Series  J  Preferred  Units  carry  terms  that  are 
substantially the same as the Series J Preferred Shares. The 
Operating  Partnership  used  most  of  the  net  proceeds  to 
pay down our Revolving Credit Facility.

During  2006,  we  completed  the  following  preferred  share 
redemptions  using  borrowings  under  our  Revolving  Credit 
Facility:

•   all of our outstanding Series E Preferred Shares, which had 
carried an annual dividend yield of 10.25%, for $28.8 mil-
lion on July 15, 2006; and

•   all of our outstanding Series F Preferred Shares, which had 
carried an annual dividend yield of 9.875%, for $35.6 mil-
lion on October 15, 2006.

Analysis of Cash Flow Associated with Investing and  
Financing Activities
Our net cash flow used in investing activities decreased $166.5 
million,  or  39.6%,  from  2005  to  2006.  This  decrease  was  due 
primarily to the following:

•   a  $217.8  million,  or  43.6%,  decrease  in  purchases  of  and 
additions  to  commercial  real  estate.  This  decrease  is  due 
primarily to a decrease in property acquisitions. We found 
the market for acquisitions to be extremely competitive in 
2006, with potential target properties selling to our com-
petitors  at  what  we  believed  to  be  very  aggressive  prices; 
this  contributed  somewhat  to  the  decrease  in  property 
acquisitions,  although  timing  played  a  part  as  well  since 
the  Nottingham  Acquisition,  to  which  we  had  dedicated 
considerable  time  in  2006,  closed  in  January  2007.  Our 
ability to locate and complete acquisitions is dependent on 
numerous  variables  and,  as  a  result,  is  inherently  subject 
to significant fluctuation from period to period; and

•   a $49.9 million, or 50.8%, decrease in proceeds from sales 
of properties and unconsolidated real estate joint ventures 
and  contributions  of  assets  to  an  unconsolidated  real 
estate  joint  venture.  Since  our  real  estate  sales  activity  is 
driven  by  transactions  unrelated  to  our  core  operations, 
our  proceeds  from  sales  of  properties  are  subject  to  sig-
nificant fluctuation from period to period and, therefore, 
we do not believe that the change described above is nec-
essarily  indicative  of  a  trend.  While  we  expect  to  reduce  
or eliminate our real estate investments in certain of our 
non-core  markets  in  the  future,  we  cannot  predict  when 
and if these dispositions will occur.

4545

management’s discussion and analysis of financial condition and results of operations

Our cash flow provided by financing activities decreased $183.5 
million,  or  57.1%,  from  2005  to  2006.  This  decrease  included 
the following:

•   a  $181.9  million,  or  31.3%,  increase  in  repayments  of 
mortgage and other loans payable. This increase is attrib-
utable  primarily  to  our  use  of  proceeds  from  additional 
equity offerings and the 3.5% Exchangeable Senior Notes 
to pay down these loans;

•   $64.4  million  in  cash  used  to  redeem  our  Series  E  and 

Series F Preferred Shares in 2006; and

•   a  $216.2  million,  or  24.3%,  decrease  in  proceeds  from 
mortgage and other loans payable due to a larger volume 
of refinancing activity; offset in part by

•   $200.0  million  in  proceeds  from  the  3.5%  Exchangeable 

Senior Notes in 2006; and

•   a $91.5 million, or 115.1%, increase in proceeds from the 

issuance of common and preferred shares.

Off-Balance Sheet Arrangements
During  2006,  we  owned  investments  in  two  unconsolidated 
joint  ventures:  Harrisburg  Corporate  Gateway  Partners,  L.P. 
and  Route  46  Partners.  We  accounted  for  these  joint  venture 
investments using the equity method of accounting. These joint 
ventures  were  entered  into  in  prior  years  to  enable  us  to  con-
tribute  office  properties  that  were  previously  wholly  owned  
by  us  into  the  joint  ventures  in  order  to  partially  dispose  of  
our interests. We managed the joint ventures’ property opera-
tions  and  any  required  construction  projects  and  earned  fees 
for  these  services.  Both  of  these  joint  ventures  have  a  two- 
member management committee that is responsible for making 
major  decisions  (as  defined  in  the  joint  venture  agreements), 
and we control one of the management committee positions in 
each case.

Route  46  Partners  sold  its  property  in  July  2006,  resulting  in  
the  dissolution  of  the  joint  venture  and  our  recognition  of  
a  $563,000  gain.  Upon  its  dissolution,  our  partner  received  
a  preferential  distribution  of  cash  flows  for  a  defined  return 
and  once  our  partner  received  its  defined  return,  we  received 
the remainder.

For  Harrisburg  Corporate  Gateway  Partners,  L.P.,  we  and  our 
partner  receive  returns  in  proportion  to  our  investments.  As 
part  of  our  obligations  under  the  joint  venture,  we  may  be 
required to make unilateral payments to fund rent shortfalls on 
behalf of a tenant that was in bankruptcy at the time the joint 
venture  was  formed;  our  total  unilateral  commitment  under 
this guaranty is approximately $306,000, although the tenant’s  

account was current as of December 31, 2006. We also agreed to 
indemnify  the  partnership’s  lender  for  80%  of  losses  under  
standard nonrecourse loan guarantees (environmental indem-
nifications  and  guarantees  against  fraud  and  misrepresenta-
tion)  during  the  period  of  time  in  which  we  manage  the 
partnership’s  properties;  we  do  not  expect  to  incur  any  losses 
under these loan guarantees.

The  table  below  sets  forth  certain  additional  information 
regarding these unconsolidated joint ventures (in thousands):

Investment 
Balance at 
12/31/06(1)

Net 
Cash 
Inflow 
in 2006

Income 
Recognized  
from  
Investment 
in 2006(2)

Fees 
Earned 
from Joint 
Ventures 
in 2006(3)

Obligation to 
Unilaterally 
Fund 
Additional 
Project Costs 
(if necessary)(4)

$(3,614)

$2,438

$471

$619

$306

(1)   This amount represents distributions in excess of our investment in Harrisburg 
Corporate Gateway Partners, L.P. at December 31, 2006 due to our not recog-
nizing gain on the contribution of properties into the joint venture. We did not 
recognize  a  gain  on  the  contribution  since  we  have  contingent  obligations,  as 
described above, that may exceed our proportionate interest remaining in effect 
as long as we continue to manage the joint venture’s properties.

(2)   This amount includes a gain of $563 on the dissolution of Route 46 Partners.

(3)   Fees  earned  by  us  for  construction,  asset  management  and  property  manage-

ment services provided to unconsolidated joint ventures.

(4)   Amounts reported in this column represent additional investments we could be 
required to fund on a unilateral basis, including the rent shortfall payments and 
lender indemnifications discussed above. We and our partner are also required 
to fund proportionally (based on our ownership percentage) additional amounts 
when needed. Since the additional fundings described in this footnote are uncer-
tain in dollar amount and we do not expect that they will be necessary, they are 
not included in the table.

During 2006, we also owned investments in four joint ventures 
that  we  accounted  for  using  the  consolidation  method  of 
accounting.  We  use  joint  ventures  such  as  these  from  time  to 
time for reasons that include the following: (1) they can provide 
a  facility  to  access  new  markets  and  investment  opportunities 
while  enabling  us  to  benefit  from  the  expertise  of  our  part-
ners; (2) they are an alternative source for raising capital to put 
towards  acquisition  or  development  activities;  and  (3)  they  
can reduce our exposure to risks associated with a property and 
its  activities.  Our  consolidated  and  unconsolidated  joint  ven-
tures  are  discussed  in  Note  5  to  our  Consolidated  Financial 
Statements, and certain commitments and contingencies related 
to these joint ventures are discussed in Note 19.

We had no other material off-balance sheet arrangements dur-
ing 2006.

4646

Contractual Obligations
The following table summarizes our contractual obligations as of December 31, 2006 (in thousands):

CONTRACTUAL OBLIGATIONS(1)(2)
Debt(3)
Interest on debt(4)
Acquisitions of properties(5)
New construction and development contracts and obligations(6)(7)
Third-party construction and development contracts(7)(8)
Capital expenditures for operating properties(7)(9)
Operating leases(10)
Other purchase obligations(11)

For the Years Ended December 31,

2007

2008 to 
2009

2010 to 
2011

Thereafter

Total

$140,950
76,500
370,865
77,595
59,597
4,283
2,615
2,334

$436,999
112,284
310
—
—
—
1,028
4,545

$181,982
87,654
—
—
—
—
268
4,482

$738,396
204,327
4,000
—
—
—
—
9,714

$1,498,327
480,765
375,175
77,595
59,597
4,283
3,911
21,075

Total contractual cash obligations

$734,739

$555,166

$274,386

$956,437

$2,520,728

  (1)   The contractual obligations set forth in this table generally exclude individual contracts that had a value of less than $20 thousand. Also excluded are contracts associ-
ated  with  the  operations  of  our  properties  that  may  be  terminated  with  notice  of  one  month  or  less,  which  is  the  arrangement  that  applies  to  most  of  our  property 
operations contracts.

  (2)   Not included in this section are amounts contingently payable by us to acquire the membership interests of certain real estate joint venture partners. See Note 19 to our 

Consolidated Financial Statements for further discussion of such amounts.

  (3)   Represents principal maturities only and therefore excludes a net premium of $210,000. Our loan maturities in 2007 include $48.8 million that may be extended until 
2008, subject to certain conditions, and approximately $75.8 million that we expect to refinance; the balance of the 2007 maturities represent primarily scheduled 
principal amortization payments that we expect to pay using cash flow from operations.

  (4)   Represents interest costs for debt at December 31, 2006 for the terms of such debt. For variable rate debt, the amounts reflected above used December 31, 2006 interest 
rates on variable rate debt in computing interest costs for the terms of such debt. For construction loan facilities where the interest payments are not payable as incurred 
but,  rather,  are  added  to  the  balance  of  the  loan  during  the  construction  period,  the  amounts  reflected  above  assumed  that  such  interest  costs  are  paid  monthly  as 
incurred.

  (5)   Represents contractual obligations at December 31, 2006 to (1) complete the Nottingham Acquisition, which was completed in January 2007 as described below in 
“Investing  and  Financing  Activities  Subsequent  to  December  31,  2006”;  (2)  acquire  a  parcel  of  land  located  in  Aberdeen,  Maryland,  which  we  expect  to  
complete in 2007 using borrowings under the Revolving Credit Facility; and (3) complete the acquisition of the remaining 91 acres of the Fort Ritchie Project. A $4.0 
million final payment on the Fort Ritchie acquisition included in the “Thereafter” column could be reduced by a range of $750,000 to the full $4.0 million; the amount 
of such decrease will be determined based on (1) defined levels of job creation resulting from the future development of the property taking place and (2) future real 
estate taxes generated by the property.

  (6)   Represents  contractual  obligations  pertaining  to  new  construction  and  development  activities.  We  expect  to  finance  these  costs  primarily  using  proceeds  from  our 

Revolving Credit Facility and construction loans.

  (7)   Because of the long-term nature of certain construction and development contracts, some of these costs will be incurred beyond 2007.

  (8)   Represents  contractual  obligations  pertaining  to  projects  for  which  we  are  acting  as  construction  manager  on  behalf  of  unrelated  parties  who  are  our  clients.  

We expect to be reimbursed in full for these costs by our clients.

  (9)   Represents contractual obligations pertaining to capital expenditures for our operating properties. We expect to finance all of these costs using cash flow from opera-

tions.

(10)   We expect to pay these items using cash flow from operations.

(11)   Primarily represents contractual obligations pertaining to managed-energy service contracts in place for certain of our operating properties. We expect to pay these 

items using cash flow from operations.

Certain of our debt instruments require that we comply with a number of restrictive financial covenants, including leverage ratio, 
minimum  net  worth,  minimum  fixed  charge  coverage,  minimum  debt  service  and  maximum  secured  indebtedness.  As  of 
December 31, 2006, we were in compliance with these financial covenants.

4747

management’s discussion and analysis of financial condition and results of operations

Investing and Financing Activities Subsequent to  
December 31, 2006
On  January  9  and  10,  2007,  we  completed  the  Nottingham 
Acquisition,  which  resulted  in  the  acquisition  of  56  operating 
properties  totaling  2.4  million  square  feet  and  land  parcels 
totaling 187 acres. All of the acquired properties are located in 
Maryland, with 36 of the operating properties, totaling 1.6 mil-
lion  square  feet,  and  land  parcels  totaling  175  acres,  located  
in  White  Marsh,  Maryland  and  the  remaining  properties  and 
land  parcels  located  in  other  regions  in  Northern  Baltimore 
County  and  the  Baltimore/Washington  Corridor.  We  believe 
that the land parcels totaling 187 acres can support at least 2.0 
million developable square feet. We completed the Nottingham 
Acquisition for an aggregate cost of approximately $363.9 mil-
lion, including approximately $1.4 million in transaction costs. 
We  financed  the  acquisition  by  (1)  issuing  $26.6  million  
in  Series  K  Preferred  Shares  to  the  seller;  (2)  issuing  $154.9  
million  in  common  shares  to  the  seller,  at  a  deemed  value  of  
$49  per  share;  (3)  assuming  existing  mortgage  loans  totaling 
$38.0  million,  with  an  average  interest  rate  of  approximately 
6.0%;  (4)  assuming  an  existing  mortgage  loan  totaling  $10.3 
million, which we repaid on January 11, 2007 using borrowings 
under  our  Revolving  Credit  Facility;  (5)  assuming  an  existing 
unsecured  loan  totaling  $89.1  million,  with  a  variable  interest 
rate of LIBOR plus 1.15% to 1.55% depending on our leverage 
levels at different points in time; (6) using $20.1 million from 
an escrow funded by proceeds from one of our property sales; 
and  (7)  using  borrowings  under  the  Revolving  Credit  Facility 
for the balance.

We believe that the Nottingham Acquisition has the following 
strategic benefits:

•   we become the largest owner of office properties in White 
Marsh,  Maryland,  a  submarket  located  in  the  Baltimore/
Washington Corridor, which we believe will be efficiently 
integrated into our operations in that region. White Marsh 
is also located off of Interstate 95, approximately 18 miles 
from  Aberdeen  Proving  Ground,  a  United  States  Army 
base; we believe that this proximity could potentially ben-
efit certain of our existing and future tenants in the United 
States defense industry;

•   it  increases  our  critical  mass  of  property  holdings  in  
the  Baltimore /Washington  Corridor  and  Suburban 
Baltimore;

•   it adds future development capacity of approximately 2.0 
million  square  feet  in  submarkets  in  which  we  have  sig-
nificant operating property holdings; and

•   we  were  able  to  hire  a  number  of  individuals  who  were 
members of the selling parties’ property management team.

The Series K Preferred Shares issued in the Nottingham Acqui-
sition are valued at, and carry a liquidation preference equal to, 
$50  per  share.  The  Series  K  Preferred  Shares  are  nonvoting, 
redeemable for cash at $50 per share at our option on or after 
January  9,  2017,  and  are  convertible,  subject  to  certain  condi-
tions,  into  common  shares  on  the  basis  of  0.8163  common 
shares for each preferred share, in accordance with the terms of 
the  Articles  Supplementary  describing  the  Series  K  Preferred 
Shares. Holders of the Series K Preferred Shares are entitled to 
cumulative dividends, payable quarterly (as and if declared by 
our Board of Trustees). Dividends will accrue from the date of 
issue  at  the  annual  rate  of  $2.80  per  share,  which  is  equal  to 
5.6% of the $50 per share liquidation preference.

Other Future Cash Requirements for Investing and  
Financing Activities
As previously discussed, as of December 31, 2006, we had con-
struction activities underway on eight office properties totaling 
831,000  square  feet  that  were  79.5%  pre-leased  (one  of  these 
properties  is  owned  through  a  consolidated  joint  venture  in 
which we have a 50% interest). We estimate remaining costs to 
be incurred will total approximately $85.6 million upon com-
pletion of these properties; we expect to incur these costs pri-
marily in 2007 and 2008. We have $21.3 million remaining to 
be  borrowed  under  construction  loan  facilities  totaling  $73.7 
million  for  four  of  these  properties.  We  expect  to  fund  the 
remaining  portion  of  these  costs  using  borrowings  from  new 
construction loan facilities and our Revolving Credit Facility.

As of December 31, 2006, we had development activities under-
way  on  11  new  office  properties  estimated  to  total  1.3  million 
square feet (we own a 50% interest in two of these properties). 
We  estimate  that  costs  for  these  properties  will  total  approxi-
mately $258.2 million. As of December 31, 2006, costs incurred 
on  these  properties  totaled  $25.7  million  and  the  balance  is 
expected to be incurred from 2007 through 2009. We expect to 
fund most of these costs using borrowings from new construc-
tion loan facilities.

4848

As  of  December  31,  2006,  we  had  redevelopment  activities 
underway on four properties totaling 740,000 square feet (two 
of  these  properties  are  owned  through  a  consolidated  joint  
venture  in  which  we  own  a  92.5%  interest).  We  estimate  that 
remaining  costs  of  the  redevelopment  activities  will  total 
approximately $48.3 million. We expect to fund most of these 
costs using borrowings under new construction loan facilities.

During 2007 and beyond, we expect to complete other acquisi-
tions  of  properties  and  commence  construction  and  develop-
ment activities in addition to the ones previously described. We 
expect to finance these activities as we have in the past, using 
mostly  a  combination  of  borrowings  from  new  debt,  borrow-
ings under our Revolving Credit Facility, proceeds from sales of 
existing properties and additional equity issuances of common 
and/or preferred shares or units.

We often use our Revolving Credit Facility initially to finance 
much  of  our  investing  and  financing  activities.  We  then  pay 
down our Revolving Credit Facility using proceeds from long-
term  borrowings  as  attractive  financing  conditions  arise  and 
equity  issuances  as  attractive  equity  market  conditions  arise. 
The  maximum  principal  amount  on  our  Revolving  Credit  is 
$500.0  million  (increased  from  $400.0  million  in  July  2006), 
with a right to further increase the maximum principal amount 
in  the  future  to  $600.0  million,  subject  to  certain  conditions. 
The facility has a scheduled maturity date in March 2008, with 
a  one-year  extension  available,  subject  to  certain  conditions, 
and carries a fee of 0.125% to 0.25% on the amount of the credit 
facility  that  is  unused.  The  borrowing  capacity  under  this 
Revolving Credit Facility is generally computed based on 65% 
of the value of assets identified by us to support repayment of 
the loan. As of February 26, 2007, the borrowing capacity under 
the  Revolving  Credit  Facility  was  $500.0  million,  of  which 
$234.0 million was available.

Factors  that  could  negatively  affect  our  ability  to  finance  our 
long-term financing and investing needs in the  future  include 
the following:

•   Our strategy is to operate with slightly higher debt levels 
than many other REITs. However, these higher debt levels 
could  make  it  difficult  to  obtain  additional  financing 
when required and could also make us more vulnerable to 
an economic downturn. Most of our properties have been 
mortgaged  or  encumbered  for  indebtedness.  In  addition, 
we rely on borrowings to fund some or all of the costs of 
new property acquisitions, construction and development 
activities and other items.

•   We may not be able to refinance our existing indebtedness.

•   Much of our ability to raise capital through the issuance of 
preferred  shares,  common  shares  or  securities  that  are 
convertible  into  our  common  shares  is  dependent  on  the 
value of our common and preferred shares. As is the case 
with any publicly traded securities, certain factors outside 
of  our  control  could  influence  the  value  of  our  common 
and preferred shares. These conditions include, but are not 
limited to: (1) market perception of REITs in general and 
office REITs in particular; (2) market perception of REITs 
relative to other investment opportunities; (3) the level of 
institutional investor interest in our company; (4) general 
economic and business conditions; (5) prevailing interest 
rates;  and  (6)  market  perception  of  our  financial  condi-
tion, performance, dividends and growth potential.

•   In  2005  and  2006,  we  completed  acquisitions  of  proper-
ties  in  regions  where  we  did  not  previously  own  proper-
ties.  Moreover,  we  expect  to  continue  to  pursue  selective 
acquisitions  of  properties  in  new  regions.  These  acquisi-
tions  may  entail  risks  in  addition  to  those  we  have  faced  
in  past  acquisitions,  such  as  the  risk  that  we  do  not  
correctly  anticipate  conditions  or  trends  in  a  new  region 
and  are  therefore  not  able  to  operate  the  acquired  prop-
erty profitably.

•   When we develop and construct properties, we assume the 
risk that actual costs will exceed our budgets, that we will 
experience  construction  or  development  delays  and  that 
projected  leasing  will  not  occur,  any  of  which  could 
adversely affect our financial performance and our ability 
to make distributions to our shareholders. In addition, we 
generally  do  not  obtain  construction  financing  commit-
ments until the development stage of a project is complete 
and construction is about to commence. We may find that 
we are unable to obtain financing needed to continue with 
the construction activities for such projects.

•   We invest in certain entities in which we are not the exclu-
sive investor or principal decision maker. Aside from our 
inability  to  unilaterally  control  the  operations  of  these 
joint  ventures,  our  investments  entail  the  additional  
risks  that  (1)  the  other  parties  to  these  investments  may 
not fulfill their financial obligations as investors, in which 
case we may need to fund such parties’ share of additional 
capital  requirements  and  (2)  the  other  parties  to  these 
investments  may  take  actions  that  are  inconsistent  with 
our objectives.

4949

management’s discussion and analysis of financial condition and results of operations

•   Real  estate  investments  can  be  difficult  to  sell  and  con-
vert  to  cash  quickly,  especially  if  market  conditions  are 
depressed. Such illiquidity will tend to limit our ability to 
vary  our  portfolio  of  properties  promptly  in  response  to 
changes in economic or other conditions. Moreover, under 
certain circumstances, the Internal Revenue Code imposes 
certain penalties on a REIT that sells property held for less 
than four years. In addition, for certain of our properties 
that  we  acquired  by  issuing  units  in  our  Operating 
Partnership, we are restricted by agreements with the sell-
ers  of  the  properties  for  a  certain  period  of  time  from 
entering into transactions (such as the sale or refinancing 
of the acquired property) that will result in a taxable gain 
to  the  sellers  without  the  sellers’  consent.  Due  to  all  of 
these  factors,  we  may  be  unable  to  sell  a  property  at  an 
advantageous time to fund our long-term capital needs.

•   We are subject to various federal, state and local environ-
mental laws. These laws can impose liability on property 
owners or  operators  for the costs  of removal  or  remedia-
tion of hazardous substances released on a property, even 
if  the  property  owner  was  not  responsible  for  the  release  
of  the  hazardous  substances.  Costs  resulting  from  envi-
ronmental  liability  could  be  substantial.  The  presence  of 
hazardous substances on our properties may also adversely 
affect occupancy and our ability to sell or borrow against 
those  properties.  In  addition  to  the  costs  of  government 
claims  under  environmental  laws,  private  plaintiffs  may 
bring  claims  for  personal  injury  or  other  reasons.  Addi-
tionally,  various  laws  impose  liability  for  the  costs  of 
removal  or  remediation  of  hazardous  substances  at  the 
disposal  or  treatment  facility.  Anyone  who  arranges  for 
the disposal or treatment of hazardous substances at such 
a facility is potentially liable under such laws. These laws 
often impose liability on an entity even if the facility was 
not owned or operated by the entity.

Management Changes
We  implemented  the  following  management  changes  effective 
on August 14, 2006:

•   Roger  A.  Waesche,  Jr.,  an  Executive  Vice  President  who 
had  been  our  Chief  Financial  Officer  since  March  1999, 
was  appointed  Executive  Vice  President  and  Chief  Oper-
ating Officer and, at the same time, ceased to serve as our 
Chief Financial Officer; and

•   Stephen  E.  Riffee  commenced  service  as  our  Executive 

Vice President and Chief Financial Officer.

FUNDS FROM OPERATIONS

Funds  from  operations  (“FFO”)  is  defined  as  net  income  
computed  using  GAAP,  excluding  gains  (or  losses)  from  sales  
of real estate, plus real estate-related depreciation and amorti-
zation,  and  after  adjustments  for  unconsolidated  partnerships 
and joint ventures. Gains from sales of newly-developed prop-
erties  less  accumulated  depreciation,  if  any,  required  under 
GAAP are included in FFO on the basis that development ser-
vices  are  the  primary  revenue  generating  activity;  we  believe 
that  inclusion  of  these  development  gains  is  in  accordance  
with the National Association of Real Estate Investment Trusts 
(“NAREIT”) definition of FFO, although others may interpret 
the definition differently.

Accounting for real estate assets using historical cost account-
ing  under  GAAP  assumes  that  the  value  of  real  estate  assets 
diminishes  predictably  over  time.  NAREIT  stated  in  its  April 
2002  White  Paper  on  Funds  from  Operations  that  “since  real 
estate asset values have historically risen or fallen with market 
conditions, many industry investors have considered presenta-
tions of operating results for real estate companies that use his-
torical  cost  accounting  to  be  insufficient  by  themselves.”  As  a 
result, the concept of FFO was created by NAREIT for the REIT 
industry to “address this problem.” We agree with the concept 
of FFO and believe that FFO is useful to management and inves-
tors  as  a  supplemental  measure  of  operating  performance 
because, by excluding gains and losses related to sales of previ-
ously depreciated operating real estate properties and excluding 
real estate-related depreciation and amortization, FFO can help 
one  compare  our  operating  performance  between  periods.  In 
addition, since most equity REITs provide FFO information to 
the  investment  community,  we  believe  that  FFO  is  useful  to 
investors as a supplemental measure for comparing our results 
to  those  of  other  equity  REITs.  We  believe  that  net  income  is 
the most directly comparable GAAP measure to FFO.

Since FFO excludes certain items includable in net income, reli-
ance on the measure has limitations; management compensates 
for  these  limitations  by  using  the  measure  simply  as  a  supple-
mental measure that is weighed in the balance with other GAAP 
and non-GAAP measures. FFO is not necessarily an indication 
of  our  cash  flow  available  to  fund  cash  needs.  Additionally,  

5050

it  should  not  be  used  as  an  alternative  to  net  income  when  
evaluating  our  financial  performance  or  to  cash  f low  from 
operating,  investing  and  financing  activities  when  evaluating 
our liquidity or ability to make cash distributions or pay debt 
service. The FFO we present may not be comparable to the FFO 
presented by other REITs since they may interpret the current 
NAREIT definition of FFO differently or they may not use the 
current NAREIT definition of FFO.

Basic  funds  from  operations  (“Basic  FFO”)  is  FFO  adjusted  
to  (1)  subtract  preferred  share  dividends  and  (2)  add  back 
GAAP net income allocated to common units in the Operating 
Partnership  not  owned  by  us.  With  these  adjustments,  Basic 
FFO  represents  FFO  available  to  common  shareholders  and 
common unitholders. Common units in the Operating Partner-
ship  are  substantially  similar  to  our  common  shares  and  are 
exchangeable  into  common  shares,  subject  to  certain  con-
ditions. We believe that Basic FFO is useful to investors due to 
the  close  correlation  of  common  units  to  common  shares.  We 
believe that net income is the most directly comparable GAAP 
measure to Basic FFO. Basic FFO has essentially the same limi-
tations as FFO; management compensates for these limitations 
in essentially the same manner as described above for FFO.

Diluted  funds  from  operations  (“Diluted  FFO”)  is  Basic  FFO 
adjusted to add back any convertible preferred share dividends 
and any other changes in Basic FFO that would result from the 
assumed  conversion  of  securities  that  are  convertible  or 
exchangeable  into  common  shares.  However,  the  computation 
of Diluted FFO does not assume conversion of securities other 
than common units in the Operating Partnership that are con-
vertible into common shares if the conversion of those securi-
ties would increase Diluted FFO per share in a given period. We 
believe that Diluted FFO is useful to investors because it is the 
numerator  used  to  compute  Diluted  FFO  per  share,  discussed 
below.  In  addition,  since  most  equity  REITs  provide  Diluted 
FFO  information  to  the  investment  community,  we  believe 
Diluted FFO is a useful supplemental measure for comparing us 
to other equity REITs. We believe that the numerator for diluted 
earnings  per  share  (“EPS”)  is  the  most  directly  comparable  

GAAP  measure  to  Diluted  FFO.  Since  Diluted  FFO  excludes  
certain items includable in the numerator to diluted EPS, reli-
ance on the measure has limitations; management compensates 
for  these  limitations  by  using  the  measure  simply  as  a  sup-
plemental  measure  that  is  weighed  in  the  balance  with  other 
GAAP and non-GAAP measures. Diluted FFO is not necessar-
ily an indication of our cash flow available to fund cash needs. 
Additionally,  it  should  not  be  used  as  an  alternative  to  net 
income when evaluating our financial performance or to cash 
flow  from  operating,  investing  and  financing  activities  when 
evaluating our liquidity or ability to make cash distributions or 
pay debt service. The Diluted FFO that we present may not be 
comparable to the Diluted FFO presented by other REITs.

Diluted  funds  from  operations  per  share  (“Diluted  FFO  per 
share”)  is  (1)  Diluted  FFO  divided  by  (2)  the  sum  of  the  (a) 
weighted average common shares outstanding during a period, 
(b)  weighted  average  common  units  outstanding  during  a 
period and (c) weighted average number of potential additional 
common  shares  that  would  have  been  outstanding  during  a 
period  if  other  securities  that  are  convertible  or  exchangeable 
into  common  shares  were  converted  or  exchanged.  However, 
the  computation  of  Diluted  FFO  per  share  does  not  assume 
conversion  of  securities  other  than  common  units  in  the 
Operating Partnership that are convertible into common shares 
if the conversion of those securities would increase Diluted FFO 
per  share  in  a  given  period.  We  believe  that  Diluted  FFO  per 
share is useful to investors because it provides investors with a 
further context for evaluating our FFO results in the same man-
ner that investors use EPS in evaluating net income available to 
common  shareholders.  In  addition,  since  most  equity  REITs 
provide  Diluted  FFO  per  share  information  to  the  investment 
community, we believe Diluted FFO per share is a useful sup-
plemental measure for comparing us to other equity REITs. We 
believe that diluted EPS is the most directly comparable GAAP 
measure  to Diluted FFO per share.  Diluted  FFO  per  share has 
most of the same limitations as Diluted FFO (described above); 
management  compensates  for  these  limitations  in  essentially 
the same manner as described above for Diluted FFO.

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management’s discussion and analysis of financial condition and results of operations

Our  Basic  FFO,  Diluted  FFO  and  Diluted  FFO  per  share  for  2002  through  2006  and  reconciliations  of  (1)  net  income  to  FFO,  
(2) the numerator for diluted EPS to diluted FFO and (3) the denominator for diluted EPS to the denominator for diluted FFO  
per share are set forth in the following table:

(in thousands, except per share data)

Net income
Add: Real estate-related depreciation and amortization
Add: Depreciation and amortization on unconsolidated real estate entities
Less: Depreciation and amortization allocable to minority interests in other  

consolidated entities

Less: Gain on sales of real estate, excluding development portion(1)

Funds from operations (“FFO”)
Add: Minority interests—common units in the Operating Partnership
Less: Preferred share dividends
Less: Issuance costs associated with redeemed preferred shares

Funds from Operations—basic (“Basic FFO”)
Add: Preferred unit distributions
Add: Expense on dilutive share-based compensation
Add: Convertible preferred share dividends

For the Years Ended December 31,

2006

2005

2004

2003

2002

$  49,227
78,631
910

$  39,031
62,850
182

$  37,032
51,371
106

$  30,877
36,681
295

$  23,301
30,832
165

(163)
(17,644)

110,961
7,276
(15,404)
(3,896)

98,937
—
—
—

(114)
(4,422)

97,527
5,889
(14,615)
—

88,801
—
—
—

(86)
(95)

88,328
5,659
(16,329)
(1,813)

75,845
—
382
21

—
(2,897)

64,956
6,712
(12,003)
—

59,665
1,049
10
544

—
(268)

54,030
5,800
(10,134)
—

49,696
2,287
327
544

Funds from Operations—diluted (“Diluted FFO”)

$  98,937

$  88,801

$  76,248

$  61,268

$  52,854

Weighted average common shares
Conversion of weighted average common units

Weighted average common shares/units—Basic FFO
Dilutive effect of share-based compensation awards
Assumed conversion of weighted average convertible preferred units
Assumed conversion of weighted average convertible preferred shares

Weighted average common shares/units—Diluted FFO

Diluted FFO per common share

Numerator for diluted EPS
Add: Minority interests—common units in the Operating Partnership
Add: Real estate-related depreciation and amortization
Add: Depreciation and amortization on unconsolidated real estate entities
Less: Depreciation and amortization allocable to minority interests in other  

consolidated entities

Less: Gain on sales of real estate, excluding development portion(1)
Add: Convertible preferred share dividends
Add: Preferred unit distributions
Add: Expense on dilutive share-based compensation
Add: Repurchase of Series C Preferred Units in excess of recorded book value

Diluted FFO

Denominator for diluted EPS
Weighted average common units
Assumed conversion of weighted average convertible preferred shares
Assumed conversion of weighted average convertible preferred units
Dilutive effect of share-based compensation awards

Denominator for Diluted FFO per share

41,463
8,511

49,974
1,799
—
—

51,773

37,371
8,702

46,073
1,626
—
—

47,699

33,173
8,726

41,899
1,896
—
134

43,929

26,659
8,932

35,591
1,405
1,101
1,197

39,294

22,472
9,282

31,754
1,262
2,421
1,197

36,634

$ 

1.91

$ 

1.86

$ 

1.74

$ 

1.56

$ 

1.44

$  29,927
7,276
78,631
910

$  24,416
5,889
62,850
182

$  18,911
5,659
51,371
106

$  7,650
6,712
36,681
295

$  13,167
5,800
30,832
165

(163)
(17,644)
—
—
—
—

(114)
(4,422)
—
—
—
—

(86)
(95)
—
—
382
—

—
(2,897)
544
1,049
10
11,224

—
(268)
544
2,287
327
—

$  98,937

$  88,801

$  76,248

$  61,268

$  52,854

43,262
8,511
—
—
—

51,773

38,997
8,702
—
—
—

47,699

34,982
8,726
—
—
221

43,929

28,021
8,932
1,197
1,101
43

39,294

23,350
9,282
1,197
2,421
384

36,634

(1)   Gains from the sale of real estate that are attributable to sales of non-operating properties are included in FFO. Gains from newly-developed or redeveloped properties 
less accumulated depreciation, if any, required under GAAP are also included in FFO on the basis that development services are the primary revenue generating activ-
ity; we believe that inclusion of these development gains is in compliance with the NAREIT definition of FFO, although others may interpret the definition differently.

5252

INFLATION

Most of our tenants are obligated to pay their share of a building’s operating expenses to the extent such expenses exceed amounts 
established  in  their  leases,  based  on  historical  expense  levels.  Some  of  our  tenants  are  obligated  to  pay  their  full  share  of  a  
building’s  operating  expenses.  These  arrangements  somewhat  reduce  our  exposure  to  increases  in  such  costs  resulting  from  
inflation.  In  addition,  since  our  average  lease  life  is  approximately  five  years,  we  generally  expect  to  be  able  to  compensate  for 
increased operating expenses through increased rental rates upon lease renewal or expiration.

Our  costs  associated  with  constructing  buildings  and  completing  renovation  and  tenant  improvement  work  increased  due  
to  higher  cost  of  materials.  We  expect  to  recover  a  portion  of  these  costs  through  higher  tenant  rents  and  reimbursements  for  
tenant  improvements.  The  additional  costs  that  we  do  not  recover  increase  depreciation  expense  as  projects  are  completed  and 
placed into service.

RECENT ACCOUNTING PRONOUNCEMENTS

For  disclosure  regarding  recent  accounting  pronouncements  and  the  anticipated  impact  they  will  have  on  our  operations,  you 
should refer to Note 2 to our Consolidated Financial Statements.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to certain market risks, the most predominant of which is change in interest rates. Increases in interest rates can 
result in increased interest expense under our Revolving Credit Facility and our other debt carrying variable interest rate terms. 
Increases in interest rates can also result in increased interest expense when our debt carrying fixed interest rate terms mature and 
need to be refinanced. Our debt strategy favors long-term, fixed-rate, secured debt over variable-rate debt to minimize the risk of 
short-term increases in interest rates. As of December 31, 2006, 93.1% of our fixed-rate debt was scheduled to mature after 2007. As 
of December 31, 2006, 7.2% of our total debt had variable interest rates, including the effect of interest rate swaps. As of December 
31, 2006, the percentage of variable-rate debt, including the effect of interest rate swaps, relative to total assets was 11.4%.

The following table sets forth our long-term debt obligations by scheduled maturity and weighted average interest rates at December 
31, 2006 (dollars in thousands):

Long-term debt:
Fixed rate(1)
Average interest rate
Variable rate
Average interest rate

For the Years Ended December 31,

2007

2008

2009

2010

2011

Thereafter

Total

$ 83,818

$ 156,761

$ 61,791

$ 73,128

$ 108,854

$738,396

$ 1,222,748

6.49%

6.42%

6.20%

5.98%

5.76%

7.27%

6.82%

$ 57,132

$ 218,447

7.20%

6.83%

$  — $  — $  — $  —
—

—

—

—

$  275,579

7.05%

(1)   Represents principal maturities only and therefore excludes net premiums of $210,000.

The fair market value of our debt was $1.50 billion at December 31, 2006 and $1.35 billion at December 31, 2005. If interest rates 
on our fixed-rate debt had been 1% lower, the fair value of this debt would have increased by $48.4 million at December 31, 2006 
and $41.9 million at December 31, 2005.

5353

We occasionally use derivative instruments such as interest rate swaps to further reduce our exposure to changes in interest rates. 
The following table sets forth information pertaining to our derivative contracts in place as of December 31, 2006 and 2005, and 
their respective fair values (dollars in thousands):

Nature of Derivative

Interest rate swap
Interest rate swap
Interest rate swap

Notional 
Amount

One-Month 
LIBOR Base

Effective 
Date

Expiration 
Date

$50,000
  25,000
  25,000

5.0360%
5.2320%
5.2320%

3/28/2006
  5/1/2006
  5/1/2006

3/30/2009
  5/1/2009
  5/1/2009

Fair Value at 
December 31,

2006

2005

$  (42) N/A
(133) N/A
(133) N/A

$ (308)

$ —

Based on our variable-rate debt balances, our interest expense would have increased by $3.2 million in 2006 and $3.6 million in 
2005 if short-term interest rates were 1% higher. Interest expense in 2006 was less sensitive to a change in interest rates than 2005 
due primarily to our having a lower average variable-rate debt balance in 2006.

5454

management’s report on internal control over financial reporting

Management  is  responsible  for  establishing  and  maintaining 
adequate internal control over financial reporting, and for per-
forming  an  assessment  of  the  effectiveness  of  internal  control 
over financial reporting as of December 31, 2006. Internal con-
trol  over  financial  reporting  is  a  process  designed  to  provide 
reasonable  assurance  regarding  the  reliability  of  financial 
reporting and the preparation of financial statements for exter-
nal purposes in accordance with generally accepted accounting 
principles.  Our  internal  control  over  financial  reporting 
includes  those  policies  and  procedures  that  (i)  pertain  to  the 
maintenance  of  records  that,  in  reasonable  detail,  accurately 
and fairly reflect the transactions and dispositions of our assets; 
(ii) provide reasonable assurance that transactions are recorded 
as  necessary  to  permit  preparation  of  financial  statements  in 
accordance with generally accepted accounting principles, and 
that  our  receipts  and  expenditures  are  being  made  only  in 
accordance with authorizations of our management and trust-
ees;  and  (iii)  provide  reasonable  assurance  regarding  preven-
tion  or  timely  detection  of  unauthorized  acquisition,  use  or 
disposition  of  our  assets  that  could  have  a  material  effect  on  
the  financial  statements.  Because  of  its  inherent  limitations, 
internal  control  over  financial  reporting  may  not  prevent  or 
detect  misstatements.  Also,  projections  of  any  evaluation  of 
effectiveness to future periods are subject to the risk that con-
trols may become inadequate because of changes in conditions, 
or that the degree of compliance with the policies or procedures 
may deteriorate.

Management  performed  an  assessment  of  the  effectiveness  of 
our  internal  control  over  financial  reporting  as  of  December  
31,  2006  based  upon  criteria  in  Internal  Control—Integrated 
Framework  issued  by  the  Committee  of  Sponsoring  Organiza-
tions  of  the  Treadway  Commission  (“COSO”).  Based  on  our 
assessment, management determined that our internal control 
over financial reporting was effective as of December 31, 2006 
based on the criteria in Internal Control—Integrated Framework 
issued by the COSO.

Our management’s assessment of the effectiveness of the Com-
pany’s internal control over financial reporting as of December 
31,  2006  has  been  audited  by  PricewaterhouseCoopers  LLP,  
an independent registered public accounting firm, as stated in 
their report which appears herein.

Dated: March 1, 2007

Randall M. Griffin
President and  
Chief Executive Officer

Stephen E. Riffee
Executive Vice President  
and Chief Financial Officer

5555

report of independent registered public accounting firm

To Board of Trustees and Shareholders of  
Corporate Office Properties Trust:

We  have  completed  integrated  audits  of  Corporate  Office 
Properties  Trust’s  consolidated  financial  statements  and  of  its 
internal  control  over  financial  reporting  as  of  December  31, 
2006, in accordance with the standards of the Public Company 
Accounting  Oversight  Board  (United  States).  Our  opinions, 
based on our audits, are presented below.

Consolidated Financial Statements and Financial  
Statement Schedule
In our opinion, the accompanying consolidated balance sheets 
and  the  related  consolidated  statements  of  operations,  share-
holders’  equity  and  cash  flows  present  fairly,  in  all  material 
respects,  the  financial  position  of  Corporate  Office  Properties 
Trust and its subsidiaries at December 31, 2006 and 2005, and 
the results of their operations and their cash flows for each of 
the three years in the period ended December 31, 2006 in con-
formity  with  accounting  principles  generally  accepted  in  the 
United  States  of  America.  These  financial  statements  are  the 
responsibility of the Company’s management. Our responsibil-
ity is to express an opinion on these financial statements based 
on  our  audits.  We  conducted  our  audits  of  these  statements  
in  accordance  with  the  standards  of  the  Public  Company 
Accounting  Oversight  Board  (United  States).  Those  standards 
require that we plan and perform the audit to obtain reasonable 
assurance  about  whether  the  financial  statements  are  free  of 
material misstatement. An audit of financial statements includes 
examining,  on  a  test  basis,  evidence  supporting  the  amounts 
and  disclosures  in  the  financial  statements,  assessing  the 
accounting  principles  used  and  significant  estimates  made  by 
management,  and  evaluating  the  overall  financial  statement 
presentation.  We  believe  that  our  audits  provide  a  reasonable 
basis for our opinion.

Internal Control over Financial Reporting
Also, in our opinion, management’s assessment, included in the 
accompanying “Management’s Report on Internal Control over 
Financial  Reporting,”  that  the  Company  maintained  effective 
internal  control  over  financial  reporting  as  of  December  31, 
2006  based  on  criteria  established  in  Internal  Control—
Integrated  Framework  issued  by  the  Committee  of  Sponsoring 
Organizations  of  the  Treadway  Commission  (COSO),  is  fairly 
stated,  in  all  material  respects,  based  on  those  criteria.  Fur-
thermore,  in  our  opinion,  the  Company  maintained,  in  all 
material  respects,  effective  internal  control  over  financial 
reporting as of December 31, 2006, based on criteria established 
in Internal Control—Integrated Framework issued by the COSO.  
The  Company’s  management  is  responsible  for  maintaining  

5656

effective  internal  control  over  financial  reporting  and  for  its  
assessment of the effectiveness of internal control over financial 
reporting. Our responsibility is to express opinions on manage-
ment’s  assessment  and  on  the  effectiveness  of  the  Company’s 
internal  control  over  financial  reporting  based  on  our  audit. 
We  conducted  our  audit  of  internal  control  over  financial 
reporting  in  accordance  with  the  standards  of  the  Public 
Company  Accounting  Oversight  Board  (United  States).  Those 
standards require that we plan and perform the audit to obtain 
reasonable  assurance  about  whether  effective  internal  control 
over financial reporting was maintained in all material respects. 
An  audit  of  internal  control  over  financial  reporting  includes 
obtaining  an  understanding  of  internal  control  over  financial 
reporting,  evaluating  management’s  assessment,  testing  and 
evaluating  the  design  and  operating  effectiveness  of  internal 
control, and performing such other procedures as we consider 
necessary in the circumstances. We believe that our audit pro-
vides a reasonable basis for our opinions.

A  company’s  internal  control  over  financial  reporting  is  a  
process  designed  to  provide  reasonable  assurance  regarding  
the  reliability  of  financial  reporting  and  the  preparation  of 
financial  statements  for  external  purposes  in  accordance  with 
generally accepted accounting principles. A company’s internal 
control  over  financial  reporting  includes  those  policies  and 
procedures that (i) pertain to the maintenance of records that, 
in  reasonable  detail,  accurately  and  fairly  ref lect  the  trans-
actions and dispositions of the assets of the company; (ii) pro-
vide  reasonable  assurance  that  transactions  are  recorded  as 
necessary  to  permit  preparation  of  financial  statements  in 
accordance with generally accepted accounting principles, and 
that receipts and expenditures of the company are being made 
only  in  accordance  with  authorizations  of  management  and 
directors  of  the  company;  and  (iii)  provide  reasonable  assur-
ance regarding prevention or timely detection of unauthorized 
acquisition,  use,  or  disposition  of  the  company’s  assets  that 
could have a material effect on the financial statements.

Because of its inherent limitations, internal control over finan-
cial  reporting  may  not  prevent  or  detect  misstatements.  Also, 
projections of any evaluation of effectiveness to future periods 
are  subject  to  the  risk  that  controls  may  become  inadequate 
because of changes in conditions, or that the degree of compli-
ance with the policies or procedures may deteriorate.

PricewaterhouseCoopers LLP
Baltimore, Maryland
March 1, 2007

consolidated balance sheets corporate office properties trust and subsidiaries

(Dollars in thousands)

ASSETS
Investment in real estate:
  Operating properties, net
  Projects under construction or development

  Total commercial real estate properties, net

Investments in and advances to unconsolidated real estate joint ventures

Investment in real estate, net

Cash and cash equivalents
Restricted cash
Accounts receivable, net
Deferred rent receivable
Intangible assets on real estate acquisitions, net
Deferred charges, net
Prepaid and other assets

Total assets

LIABILITIES AND SHAREHOLDERS’ EQUITY
Liabilities:
  Mortgage and other loans payable
  3.5% Exchangeable Senior Notes
  Accounts payable and accrued expenses
  Rents received in advance and security deposits
  Dividends and distributions payable
  Deferred revenue associated with acquired operating leases
  Distributions in excess of investment in unconsolidated real estate joint venture
  Fair value of derivatives
  Other liabilities

Total liabilities

Minority interests:
  Common units in the Operating Partnership
  Preferred units in the Operating Partnership
  Other consolidated real estate joint ventures

Total minority interests

Commitments and contingencies (Note 19)
Shareholders’ equity:

 Preferred Shares of beneficial interest ($0.01 par value; shares authorized of 15,000,000, issued and 
outstanding of 7,590,000 at December 31, 2006 and 6,775,000 at December 31, 2005 (Note 11))
 Common Shares of beneficial interest ($0.01 par value; 75,000,000 shares authorized, shares issued 

and outstanding of 42,897,639 at December 31, 2006 and 39,927,316 at December 31, 2005)

  Additional paid-in capital
  Cumulative distributions in excess of net income
  Value of unearned restricted common share grants
  Accumulated other comprehensive loss

Total shareholders’ equity

Total liabilities and shareholders’ equity

See accompanying notes to consolidated financial statements.

December 31,

2006

2005

$ 1,812,883
298,427

$ 1,631,038
255,617

2,111,310
—

2,111,310
7,923
52,856
26,367
41,643
87,325
43,710
48,467

1,886,655
1,451

1,888,106
10,784
21,476
15,606
32,579
90,984
35,046
35,178

$ 2,419,601

$ 2,129,759

$ 1,298,537
200,000
68,190
20,237
19,164
11,120
3,614
308
7,941

$ 1,348,351
—
41,693
14,774
16,703
12,707
3,081
—
4,727

1,629,111

1,442,036

104,934
8,800
2,453

116,187

95,014
8,800
1,396

105,210

76

67

429
758,032
(83,541)
—
(693)

399
657,339
(67,697)
(7,113)
(482)

674,303

582,513

$ 2,419,601

$ 2,129,759

5757

 
 
 
 
consolidated statements of operations corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

Revenues
  Rental revenue
  Tenant recoveries and other real estate operations revenue
  Construction contract revenues
  Other service operations revenues

  Total revenues

Expenses
  Property operating expenses
  Depreciation and other amortization associated with real estate operations
  Construction contract expenses
  Other service operations expenses
  General and administrative expenses

  Total operating expenses

Operating income
Interest expense
Amortization of deferred financing costs

Income from continuing operations before equity in loss of unconsolidated entities, income 

taxes and minority interests

Equity in loss of unconsolidated entities
Income tax expense

Income from continuing operations before minority interests
Minority interests in income from continuing operations
  Common units in the Operating Partnership
  Preferred units in the Operating Partnership
  Other consolidated entities

Income from continuing operations
Income from discontinued operations, net of minority interests

Income before gain (loss) on sales of real estate
Gain (loss) on sales of real estate, net of minority interests

Net income
Preferred share dividends
Issuance costs associated with redeemed preferred shares

Net income available to common shareholders

Basic earnings per common share
Income from continuing operations
Discontinued operations

Net income available to common shareholders

Diluted earnings per common share
Income from continuing operations
Discontinued operations

Net income available to common shareholders

See accompanying notes to consolidated financial statements.

5858

For the Years Ended December 31,

2006

2005

2004

$ 260,493
40,826
52,182
7,902

$ 212,010
30,063
74,357
4,877

$ 182,860
21,084
25,018
3,885

361,403

321,307

232,847

94,504
78,712
49,961
7,384
16,936

72,253
61,049
72,534
4,753
13,534

58,982
49,289
23,733
3,263
10,938

247,497

224,123

146,205

113,906
(71,378)
(2,847)

97,184
(54,872)
(2,229)

86,642
(42,148)
(2,420)

39,681
(92)
(887)

40,083
(88)
(668)

42,074
(88)
(795)

38,702

39,327

41,191

(4,060)
(660)
136

34,118
14,377

48,495
732

(4,670)
(660)
85

34,082
4,681

38,763
268

(5,306)
(179)
12

35,718
1,427

37,145
(113)

49,227
(15,404)
(3,896)

39,031
(14,615)
—

37,032
(16,329)
(1,813)

$  29,927

$  24,416

$  18,890

$ 

0.37
0.35

$ 

0.53
0.12

$ 

0.53
0.04

$ 

0.72

$ 

0.65

$ 

0.57

$ 

0.36
0.33

$ 

0.51
0.12

$ 

0.50
0.04

$ 

0.69

$ 

0.63

$ 

0.54

 
 
consolidated statements of shareholders’ equity

corporate office properties trust and subsidiaries

(Dollars in thousands)

Balance at December 31, 2003  

(29,397,267 common shares outstanding)

Conversion of common units to common shares (326,108 shares)
Common shares issued to the public (5,033,600 shares)
Common shares issued to employees (4,000 shares)
Series B Preferred Shares redemption
Series D Preferred Shares conversion
Increase in fair value of derivatives
Restricted common share grants issued (99,935 shares)
Value of earned restricted share grants
Exercise of share options (784,398 shares)
Expense associated with share options
Adjustments to minority interests resulting from changes in  

ownership of Operating Partnership by COPT
Increase in tax benefit from share-based compensation
Net income
Dividends

Balance at December 31, 2004  

(36,842,108 common shares outstanding)

Conversion of common units to common shares (253,575 shares)
Common shares issued to the public (2,300,000 shares)
Decrease in fair value of derivatives
Restricted common share grants issued (130,975 shares)
Restricted common share cancellations (10,422 shares)
Value of earned restricted share grants
Exercise of share options (411,080 shares)
Expense associated with share options
Adjustments to minority interests resulting from changes in  

ownership of Operating Partnership by COPT

Decrease in tax benefit from share-based compensation
Net income
Dividends

Balance at December 31, 2005  

(39,927,316 common shares outstanding)

Conversion of common units to common shares (245,793 shares)
Common shares issued to the public (2,000,000 shares)
Series J Preferred Shares issued to the public (3,390,000 shares)
Series E Preferred Shares redemption
Series F Preferred Shares redemption
Decrease in fair value of derivatives
Reversal of unearned restricted common share grants upon  

adoption of SFAS 123(R)

Exercise of share options (581,932 shares)
Expense associated with share-based compensation
Adjustments to minority interests resulting from changes in 

ownership of Operating Partnership by COPT
Increase in tax benefit from share-based compensation
Net income
Dividends

Balance at December 31, 2006  

(42,897,639 common shares outstanding)

See accompanying notes to consolidated financial statements.

Preferred 
Shares

Common 
Shares

Additional 
Paid-in 
Capital

Cumulative 
Distributions 
in Excess of 
Net Income

Value of 
Unearned 
Restricted 
Common 
Share 
Grants

Accumulated 
Other 
Comprehensive 
Loss

$    85
—
—
—
(13)
(5)
—
—
—
—
—

—
—
—
—

67
—
—
—
—
—
—
—
—

—
—
—
—

67

—
—
34
(11)
(14)
—

—
—
—

—
—
—
—

$294
3
50
—
—
12
—
1
—
8
—

—
—
—
—

368
3
23
—
1
—
—
4
—

—
—
—
—

$492,886
8,038
115,184
91
(31,238)
(7)
—
2,270
388
7,502
519

(19,360)
1,955
—
—

578,228
9,117
75,118
—
3,480
(205)
536
4,394
93

(12,888)
(534)
—
—

$(38,483)
—
—
—
—
—
—
—
—
—
—

—
—
37,032
(49,907)

(51,358)
—
—
—
—
—
—
—
—

—
—
39,031
(55,370)

$(4,107)
—
—
—
—
—
—
(2,271)
997
—
—

—
—
—
—

(5,381)
—
—
—
(3,481)
205
1,544
—
—

—
—
—
—

399

657,339

(67,697)

(7,113)

3
20
—
—
—
—

1
6
—

—
—
—
—

11,075
82,413
81,823
(28,739)
(35,611)
—

(5,169)
6,761
3,833

(16,255)
562
—
—

—
—
—
—
—
—

—
—
—

—
—
49,227
(65,071)

—
—
—
—
—
—

7,113
—
—

—
—
—
—

$(294)
—
—
—
—
—
294
—
—
—
—

—
—
—
—

—
—
—
(482)
—
—
—
—
—

—
—
—
—

(482)

—
—
—
—
—
(211)

—
—
—

—
—
—
—

Total

$ 450,381
8,041
115,234
91
(31,251)
—
294
—
1,385
7,510
519

(19,360)
1,955
37,032
(49,907)

521,924
9,120
75,141
(482)
—
—
2,080
4,398
93

(12,888)
(534)
39,031
(55,370)

582,513

11,078
82,433
81,857
(28,750)
(35,625)
(211)

1,945
6,767
3,833

(16,255)
562
49,227
(65,071)

$    76

$429

$758,032

$(83,541)

$       —

$(693)

$ 674,303

5959

consolidated statements of cash flows corporate office properties trust and subsidiaries

(Dollars in thousands)

Cash flows from operating activities
  Net income
  Adjustments to reconcile net income to net cash provided by operating activities:

  Minority interests
  Depreciation and other amortization
  Amortization of deferred financing costs
  Amortization of deferred market rental revenue
  Equity in loss of unconsolidated entities

(Gain) loss on sales of real estate

  Share-based compensation
  Excess income tax benefits from share-based compensation

  Changes in operating assets and liabilities:
Increase in deferred rent receivable
(Increase) decrease in accounts receivable
Increase in restricted cash and prepaid and other assets
Increase in accounts payable, accrued expenses and other liabilities
Increase in rents received in advance and security deposits

  Other

For the Years Ended December 31,

2006

2005

2004

$  49,227

$  39,031

$  37,032

7,800
80,074
2,981
(1,904)
92
(17,920)
3,833
(562)

(10,004)
(10,844)
(7,098)
13,544
4,181
(249)

6,464
63,555
2,240
(426)
88
(4,690)
2,173
—

(6,922)
1,165
(14,260)
5,953
1,993
(420)

5,826
51,904
2,431
(931)
88
150
1,904
—

(8,372)
(3,579)
(7,859)
3,528
2,322
50

  Net cash provided by operating activities

113,151

95,944

84,494

Cash flows from investing activities
  Purchases of and additions to commercial real estate properties
  Proceeds from sales of properties
  Proceeds from sale of unconsolidated real estate joint venture
  Proceeds from contribution of assets to unconsolidated real estate joint venture
  Acquisition of partner interests in consolidated joint ventures
Investments in and advances from (to) unconsolidated entities

  Distributions from unconsolidated entities
  Leasing costs paid
  Advances to certain real estate joint ventures
  Decrease (increase) in restricted cash associated with investing activities
  Purchases of furniture, fixtures and equipment
  Other

  Net cash used in investing activities

Cash flows from financing activities
  Proceeds from mortgage and other loans payable
  Proceeds from 3.5% Exchangeable Senior Notes
  Repayments of mortgage and other loans payable
  Deferred financing costs paid

Increase in other liabilities associated with financing activities

  Distributions paid to partners in consolidated joint ventures
  Net proceeds from issuance of common shares
  Net proceeds from issuance of preferred shares
  Redemption of preferred shares
  Dividends paid
  Distributions paid
  Excess income tax benefits from share-based compensation
  Other

  Net cash provided by financing activities

Net (decrease) increase in cash and cash equivalents
Cash and cash equivalents
  Beginning of period

  End of period

See accompanying notes to consolidated financial statements.

6060

(282,099)
46,704
1,524
—
(5,250)
454
499
(10,480)
—
5,260
(8,109)
(2,337)

(499,926)
29,467
—
68,633
(1,208)
(130)
250
(9,272)
—
(5,620)
(2,434)
(61)

(251,982)
—
—
—
(4,928)
(146)
—
(11,024)
(515)
1,183
(1,308)
—

(253,834)

(420,301)

(268,720)

673,176
200,000
(762,590)
(6,605)
—
(787)
89,202
81,857
(64,375)
(62,845)
(10,422)
562
649

889,399
—
(580,642)
(4,307)
—
—
79,539
—
—
(53,587)
(9,677)
—
595

573,879
—
(421,621)
(3,436)
4,000
—
122,744
—
(31,251)
(47,551)
(8,435)
—
237

137,822

321,320

188,566

(2,861)

(3,037)

4,340

10,784

13,821

9,481

$ 

7,923

$  10,784

$  13,821

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

1. ORGANIZATION

Corporate  Office  Properties  Trust  (“COPT”)  and  subsidiaries 
(collectively,  the  “Company”)  is  a  fully-integrated  and  self-
managed real estate investment trust (“REIT”) that focuses on 
the  acquisition,  development,  ownership,  management  and 
leasing  of  primarily  Class  A  suburban  office  properties  in  the 
Greater Washington, D.C. region and other select submarkets. 
We also have a core customer expansion strategy that is built on 
meeting,  through  acquisitions  and  development,  the  multi-
location requirements of our strategic tenants. As of December 
31, 2006, our investments in real estate included the following:

•   170  wholly  owned  operating  properties  in  our  portfolio 

totaling 15.1 million square feet;

•   16  wholly  owned  office  properties  under  construction  or 
development that we estimate will total approximately 1.8 
million  square  feet  upon  completion  and  two  wholly 
owned  office  properties  totaling  approximately  129,000 
square feet that were under redevelopment;

•   wholly  owned  land  parcels  totaling  1,048  acres  that  we 
believe are potentially developable into approximately 8.4 
million square feet; and

•   partial  ownership  interests  in  a  number  of  other  real  
estate  projects  in  operations  or  under  development  or 
redevelopment.

We conduct almost all of our operations through our operating 
partnership, Corporate Office Properties, L.P. (the “Operating 
Partnership”), for which we are the managing general partner. 
The  Operating  Partnership  owns  real  estate  both  directly  and 
through  subsidiary  partnerships  and  limited  liability  compa-
nies (“LLCs”). A summary of our Operating Partnership’s forms 
of  ownership  and  the  percentage  of  those  ownership  forms 
owned by COPT as of December 31, 2006 and 2005 follows:

December 31,

2006

2005

Common Units
Series E Preferred Units(1)
Series F Preferred Units(1)
Series G Preferred Units
Series H Preferred Units
Series I Preferred Units
Series J Preferred Units(2)

(1)   These preferred units were redeemed in 2006.

(2)   These preferred units were issued in 2006.

83%
N/A
N/A

82%
100%
100%
100% 100%
100% 100%
0%
N/A

0%
100%

Two of our trustees controlled, either directly or through own-
ership by other entities or family members, an additional 14% 
of the Operating Partnership’s common units.

In  addition  to  owning  interests  in  real  estate,  the  Operating 
Partnership also owns 100% of Corporate Office Management, 
Inc.  (“COMI”)  and  owns,  either  directly  or  through  COMI, 
100%  of  the  consolidated  subsidiaries  that  are  set  forth  below 
(collectively defined as the “Service Companies”):

Entity Name

Type of Service Business

COPT Property Management Services, 

Real Estate Management

LLC (“CPM”)

COPT Development & Construction 

Services, LLC (“CDC”)

Corporate Development Services,  

LLC (“CDS”)

COPT Environmental Systems,  

LLC (“CES”)(1)

Construction and 
Development
Construction and 
Development
Heating and Air 
Conditioning

(1)   Prior to 2007, CES’s name was Corporate Cooling and Controls, LLC.

Most of the services that CPM provides are for us. CDC, CDS 
and CES provide services to us and to third parties.

2.  SUMMARY OF SIGNIFICANT  

ACCOUNTING POLICIES

Basis of Presentation
We generally use three different accounting methods to report 
our  investments  in  entities:  the  consolidation  method,  the 
equity  method  and  the  cost  method.  These  methods  are 
described below.

Consolidation Method
We generally use the consolidation method when we own most 
of the outstanding voting interests in an entity and can control 
its operations. In accordance with Financial Accounting Stan-
dards Board (“FASB”) Interpretation No. 46(R), “Consolidation 
of Variable Interest Entities” (“FIN 46(R)”), we also consolidate 
certain  entities  when  control  of  such  entities  can  be  achieved 
through  means  other  than  voting  rights  (“variable  interest  
entities” or “VIEs”) if we are deemed to be the primary benefi-
ciary.  Generally,  FIN  46(R)  applies  when  either  (1)  the  equity 
investors (if any) lack one or more of the essential characteris-
tics of a controlling financial interest; (2) the equity investment 
at  risk  is  insufficient  to  finance  that  entity’s  activities  without 
additional  subordinated  financial  support;  or  (3)  the  equity 
investors have voting rights that are not proportionate to their 
economic interests and the activities of the entity involve or are 
conducted  on  behalf  of  an  investor  with  a  disproportionately 
small voting interest.

6161

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

Under  the  consolidation  method  of  accounting,  the  accounts  
of  the  entity  being  consolidated  are  combined  with  our 
accounts.  We  eliminate  balances  and  transactions  between 
companies  when  we  consolidate  these  accounts.  For  all  of  the 
periods  presented,  our  Consolidated  Financial  Statements 
include the accounts of:

•   COPT;

•   the Operating Partnership and its subsidiary partnerships 

and LLCs;

•   the Service Companies; and

•   Corporate  Office  Properties  Holdings,  Inc.  (of  which  we 

own 100%).

Equity Method
We  generally  use  the  equity  method  of  accounting  when  we 
own an interest in an entity and can exert significant influence 
over  the  entity’s  operations  but  cannot  control  the  entity’s  
operations. FIN 46(R) affects our determination of when to use 
the equity method of accounting since we would generally use 
the  equity  method  for  VIEs  of  which  we  are  not  the  primary 
beneficiary. Under the equity method, we report:

•   our ownership interest in the entity’s capital as an invest-

ment on our Consolidated Balance Sheets; and

•   our  percentage  share  of  the  earnings  or  losses  from  the 

entity in our Consolidated Statements of Operations.

Cost Method
We use the cost method of accounting when we own an interest 
in  an  entity  and  cannot  exert  significant  influence  over  the 
entity’s operations. Under the cost method, we report:

•   the cost of our investment in the entity as an investment 

on our Consolidated Balance Sheets; and

•   distributions to us of the entity’s earnings in our Consoli-

dated Statements of Operations.

Use of Estimates in the Preparation of Financial Statements
We make estimates and assumptions when preparing financial 
statements  under  generally  accepted  accounting  principles 
(“GAAP”).  These  estimates  and  assumptions  affect  various 
matters, including:

•   the  reported  amounts  of  assets  and  liabilities  in  our 
Consolidated  Balance  Sheets  at  the  dates  of  the  financial 
statements;

•   the  disclosure  of  contingent  assets  and  liabilities  at  the 

dates of the financial statements; and

•   the  reported  amounts  of  revenues  and  expenses  in  our 
Consolidated Statements of Operations during the report-
ing periods.

These  estimates  include  such  items  as  depreciation,  allocation 
of  real  estate  acquisition  costs  and  allowances  for  doubtful 
accounts.  Actual  results  could  differ  from  those  estimates. 
These estimates involve judgments with respect to, among other 
things, future economic factors that are difficult to predict and 
are  often  beyond  management’s  control.  As  a  result,  actual 
amounts could differ from these estimates.

Acquisitions of Real Estate
We allocate the costs of real estate acquisitions to assets acquired 
and  liabilities  assumed  based  on  the  relative  fair  values  at  the 
date  of  acquisition  pursuant  to  the  provisions  of  Statement  
of  Financial  Accounting  Standards  No.  141,  “Business  Com-
binations.”  In  estimating  the  fair  value  of  the  tangible  and 
intangible  assets  acquired,  we  consider,  among  other  things, 
information obtained about each property as a result of our due 
diligence,  leasing  activities  and  knowledge  of  the  markets  in 
which  the  properties  are  located.  We  utilize  various  valuation 
methods,  such  as  estimated  cash  f low  projections  utilizing  
discount  and  capitalization  rate  assumptions  and  available 
market information. We allocate the costs of real estate acqui-
sitions to the following components:

•   Real estate based on a valuation of the acquired property 
performed with the assumption that the property is vacant 
upon acquisition (the “as if vacant value”). We then allo-
cate  the  real  estate  value  derived  using  this  approach 
between  land  and  building  and  improvements  using  our 
estimates and assumptions.

•   In-place  operating  leases  to  the  extent  that  the  present 
value of future rents under the contractual lease terms are 
above  or  below  the  present  value  of  market  rents  at  the 
time  of  acquisition  (the  “lease  to  market  value”).  For 
example,  if  we  acquire  a  property  and  the  leases  in  place 
for  that  property  carry  rents  below  the  market  rent  for 
such  leases  at  the  time  of  acquisition,  we  classify  the 
amount  equal  to  the  difference  between  (1)  the  present 
value  of  the  future  rental  revenue  under  the  lease  using 
market  rent  assumptions  and  (2)  the  present  value  of 
future  rental  revenue  under  the  terms  of  the  lease  as 
deferred revenue. Conversely, if the leases in place for that 
property carry rents above the market rent, we classify the 
difference  as  an  intangible  asset.  Deferred  revenue  or 
deferred assets recorded in connection with in-place oper-
ating  leases  of  acquired  properties  are  amortized  into 
rental revenue over the terms of the leases.

•   Existing tenants in a property (the “lease-up value”). This 
amount  represents  the  value  associated  with  acquiring  a 
built-in  revenue  stream  on  a  leased  building.  It  is  com-
puted  as  the  difference  between  the  present  value  of  the 
property’s  (1)  revenues  less  operating  expenses  as  if  the 

6262

property  was  vacant  upon  acquisition  and  (2)  revenues 
less  operating  expenses  as  if  the  property  was  acquired 
with leases in place at market rents.

•   Deemed  cost  avoidance  of  acquiring  in-place  operating 
leases  (“deemed  cost  avoidance”).  For  example,  when  a 
new lease is entered into, the lessor typically incurs a num-
ber of origination costs in connection with the leases; such 
costs  include  tenant  improvements  and  leasing  costs. 
When a property is acquired with in-place leases, the orig-
ination costs for such leases were already incurred by the 
prior  owner.  Therefore,  to  recognize  the  value  of  these 
costs in recording a property acquisition, we assign value 
to  the  tenant  improvements  and  leasing  costs  associated 
with the remaining term of in-place operating leases.

•   Tenant relationship value equal to the additional amount 
that  we  pay  for  a  property  in  connection  with  the  pres-
ence  of  a  particular  tenant  in  that  property  (the  “tenant 
relationship  value”).  Our  valuation  of  this  component  
is  affected  by,  among  other  things,  our  tenant  lease  
renewal  assumptions  and  evaluation  of  existing  relation-
ships with tenants.

•   Market  concentration  premium  equal  to  the  additional 
amount  that  we  pay  for  a  property  over  the  fair  value  of 
assets  in  connection  with  our  strategy  of  increasing  our 
presence  in  regional  submarkets  (the  “market  concentra-
tion premium”).

Commercial Real Estate Properties
We report commercial real estate properties at our depreciated 
cost.  The  amounts  reported  for  our  commercial  real  estate 
properties include our costs of:

•   acquisitions;

•   development and construction;

•   building and land improvements; and

•   tenant improvements paid by us.

We capitalize interest expense, real estate taxes, direct internal 
labor (including allocable overhead costs) and other costs asso-
ciated  with  real  estate  undergoing  construction  and  develop-
ment  activities  to  the  cost  of  such  activities.  We  continue  to 
capitalize  these  costs  while  construction  and  development 
activities are underway until a property becomes “operational,” 
which  occurs  upon  the  earlier  of  when  leases  commence  on 
space  or  one  year  after  the  cessation  of  major  construction 
activities.  When  leases  commence  on  portions  of  a  newly- 
constructed  property’s  space  in  the  period  prior  to  one  year 
from the cessation of major construction activities, we consider 
that property to be “partially operational.” When a property is  

partially  operational,  we  allocate  the  costs  associated  with  the 
property  between  the  portion  that  is  operational  and  the  
portion  under  construction.  We  start  depreciating  newly- 
constructed properties as they become operational.

We  depreciate  our  assets  evenly  over  their  estimated  useful  
lives as follows:

•   Buildings and building  

10–40 years

improvements

•   Land improvements

10–20 years

•   Tenant improvements on  

Related lease terms

operating properties

•   Equipment and personal property

3–10 years

When  events  or  circumstances  indicate  that  a  property  may  
be  impaired,  we  perform  an  undiscounted  cash  flow  analysis. 
We  consider  an  asset  to  be  impaired  when  its  undiscounted 
expected  future  cash  flows  are  less  than  its  depreciated  cost. 
When we determine that an asset is impaired, we utilize meth-
ods similar to those used by independent appraisers in estimat-
ing the fair value of the asset; this process requires us to make 
certain  estimates  and  assumptions.  We  then  recognize  an 
impairment loss based on the excess of the carrying amount of 
the asset over its fair value. We have not recognized impairment 
losses on our real estate assets to date.

When we determine that a real estate asset will be held for sale, 
we  discontinue  the  recording  of  depreciation  expense  of  the 
asset and estimate the sales price, net of selling costs; if we then 
determine  that  the  estimated  sales  price,  net  of  selling  costs,  
is  less  than  the  net  book  value  of  the  asset,  we  recognize  an 
impairment loss equal to the difference and reduce the carrying 
amounts of assets.

When  we  sell  an  operating  property,  or  determine  that  an  
operating property is held for sale, and determine that we have 
no  significant  continuing  involvement  in  such  property,  we 
classify  the  results  of  operations  for  such  property  as  discon-
tinued operations. Interest expense that is specifically identifi-
able  to  properties  included  in  discontinued  operations  is  used 
in  the  computation  of  interest  expense  attributable  to  discon-
tinued operations. When properties included in the borrowing 
base  to  support  lines  of  credit  are  classified  as  discontinued 
operations,  we  allocate  a  portion  of  such  credit  lines’  interest 
expense to discontinued operations; we compute this allocation 
based on the percentage that the related properties represent of 
all  properties  included  in  the  borrowing  base  to  support  such 
credit lines.

We  expense  property  maintenance  and  repair  costs  when 
incurred.

6363

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

Sales of Interests in Real Estate
We  recognize  gains  from  sales  of  interests  in  real  estate  using 
the full accrual method, provided that various criteria relating 
to the terms of sale and any subsequent involvement by us with 
the  real  estate  sold  are  met.  We  recognize  gains  relating  to 
transactions  that  do  not  meet  the  requirements  of  the  full 
accrual method of accounting when the full accrual method of 
accounting criteria are met.

Cash and Cash Equivalents
Cash  and  cash  equivalents  include  all  cash  and  liquid  invest-
ments  that  mature  three  months  or  less  from  when  they  are 
purchased. Cash equivalents are reported at cost, which approx-
imates  fair  value.  We  maintain  our  cash  in  bank  accounts  
in  amounts  that  may  exceed  federally  insured  limits  at  times. 
We  have  not  experienced  any  losses  in  these  accounts  in  
the  past  and  believe  that  we  are  not  exposed  to  significant  
credit  risk  because  our  accounts  are  deposited  with  major 
financial institutions.

Accounts Receivable
Our  accounts  receivable  are  reported  net  of  an  allowance  for 
bad debts of $252 at December 31, 2006 and $421 at December 
31, 2005.

Revenue Recognition
We  recognize  rental  revenue  evenly  over  the  terms  of  tenant 
leases. When our leases provide for contractual rent increases, 
which  is  most  often  the  case,  we  average  the  non-cancelable 
rental  revenues  over  the  lease  terms  to  evenly  recognize  such 
revenues;  we  refer  to  the  adjustments  resulting  from  this  pro-
cess  as  straight-line  rental  revenue  adjustments.  We  consider 
rental revenue under a lease to be non-cancelable when a tenant 
(1) may not terminate its lease obligation early or (2) may ter-
minate its lease obligation early in exchange for a fee or penalty 
that we consider material enough such that termination would 
not  be  probable.  We  report  these  straight-line  rental  revenue 
adjustments  recognized  in  advance  of  payments  received  as 
deferred  rent  receivable  on  our  Consolidated  Balance  Sheets. 
We report prepaid tenant rents as rents received in advance on 
our Consolidated Balance Sheets.

When tenants terminate their lease obligations prior to the end 
of  their  agreed  lease  terms,  they  typically  pay  fees  to  cancel 
these obligations. We recognize such fees as revenue and write 
off  against  such  revenue  any  (1)  deferred  rents  receivable  and 
(2) deferred revenue and intangible assets that are amortizable 
into  rental  revenue  associated  with  the  leases;  the  resulting  
net  amount  is  the  net  revenue  from  the  early  termination  of  
the  leases.  When  a  tenant’s  lease  for  space  in  a  property  is  
terminated  early  but  the  tenant  continues  to  lease  such  space 
under a new or modified lease in the property, the net revenue  

from  the  early  termination  of  the  lease  is  recognized  evenly  
over  the  remaining  life  of  the  new  or  modified  lease  in  place  
on that property.

We  recognize  tenant  recovery  revenue  in  the  same  periods  in 
which  we  incur  the  related  expenses.  Tenant  recovery  revenue 
includes payments from tenants as reimbursement for property 
taxes, utilities and other property operating expenses.

We recognize fees for services provided by us once services are 
rendered,  fees  are  determinable  and  collectibility  is  assured.  
We  generally  recognize  revenue  under  construction  contracts 
using the percentage of completion method when the contracts 
call for services to be provided over a period of time exceeding 
six  months  and  the  revenue  and  costs  for  such  contracts  can  
be  estimated  with  reasonable  accuracy;  when  these  criteria  do 
not apply to a contract, we recognize revenue on that contract 
once  the  services  under  the  contract  are  complete.  Under  the 
percentage of completion method, we recognize a percentage of 
the total estimated revenue on a contract based on the cost of 
services provided on the contract as of a point in time relative 
to the total estimated costs on the contract.

Intangible Assets and Deferred Revenue on  
Real Estate Acquisitions
We  capitalize  intangible  assets  and  deferred  revenue  on  real 
estate  acquisitions  as  described  in  the  section  above  entitled 
“Acquisitions of Real Estate.” We amortize the intangible assets 
and deferred revenue as follows:

•   Lease to market value

Related lease terms

•   Lease-up value

Related lease terms or  
estimated period of time 
that tenant will lease space 
in property

•   Deemed cost avoidance

Related lease terms

•   Tenant relationship value

Estimated period of time 
that tenant will lease space 
in property

•   Market concentration  

40 years

premium

We  recognize  the  amortization  of  lease  to  market  value  assets 
and deferred revenues as adjustments to rental revenue reported 
in our Consolidated Statements of Operations; we refer to this 
amortization  as  amortization  of  origination  value  of  leases  
on  acquired  properties.  We  recognize  the  amortization  of  
other  intangible  assets  on  real  estate  acquisitions  as  deprecia-
tion and amortization expense on our Consolidated Statements 
of Operations.

6464

Deferred Charges
We  defer  costs  that  we  incur  to  obtain  new  tenant  leases  or 
extend  existing  tenant  leases.  We  amortize  these  costs  evenly 
over  the  lease  terms.  When  tenant  leases  are  terminated  early, 
we  expense  any  unamortized  deferred  leasing  costs  associated 
with those leases.

We  also  defer  costs  for  long-term  financing  arrangements  
and  amortize  these  costs  over  the  related  loan  terms  on  a 
straight-line  basis,  which  approximates  the  amortization  that 
would  occur  under  the  effective  interest  method  of  amortiza-
tion.  We  expense  any  unamortized  loan  costs  when  loans  are 
retired early.

When the costs of acquisitions exceed the fair value of tangible 
and  identifiable  intangible  assets  and  liabilities,  we  record 
goodwill  in  connection  with  such  acquisitions.  We  test  good-
will annually for impairment and in interim periods if certain 
events  occur  indicating  that  the  carrying  value  of  goodwill  
may  be  impaired.  We  recognize  an  impairment  loss  when  the  
discounted  expected  future  cash  f lows  associated  with  the 
related reporting unit are less than its unamortized cost.

Derivatives
We are exposed to the effect of interest rate changes in the nor-
mal course of business. We use interest rate swap, interest rate 
cap and forward starting swap agreements in order to attempt 
to reduce the impact of such interest rate changes. Interest rate 
differentials that arise under interest rate swap and interest rate 
cap  contracts  are  recognized  in  interest  expense  over  the  life  
of the respective contracts. Interest rate differentials that arise 
under forward starting swaps are recognized in interest expense 
over  the  life  of  the  respective  loans  for  which  such  swaps  are 
obtained. We do not use such derivatives for trading or specula-
tive purposes. We manage counter-party risk by only entering 
into  contracts  with  major  financial  institutions  based  upon 
their credit ratings and other risk factors.

We recognize all derivatives as assets or liabilities in the balance 
sheet at fair value with the offset to:

•   the  accumulated  other  comprehensive  loss  component  of 
shareholders’  equity  (“AOCL”),  net  of  the  share  attribut-
able to minority interests, for any derivatives designated as 
cash flow hedges to the extent such derivatives are deemed 
effective in hedging risks (risk in the case of our existing 
derivatives being defined as changes in interest rates);

•   interest expense on our Statements of Operations for any 
derivatives designated as cash flow hedges to the extent such 
derivatives are deemed ineffective in hedging risks; or

•   other  revenue  on  our  Statements  of  Operations  for  any 

derivatives designated as fair value hedges.

We  use  standard  market  conventions  and  techniques  such  as 
discounted cash flow analysis, option pricing models, replace-
ment  cost  and  termination  cost  in  computing  the  fair  value  
of derivatives at each balance sheet date.

Minority Interests
As  discussed  previously,  we  consolidate  the  accounts  of  our 
Operating  Partnership  and  its  subsidiaries  into  our  financial 
statements.  However,  we  do  not  own  100%  of  the  Operating 
Partnership. We also do not own 100% of certain consolidated 
real  estate  joint  ventures.  The  amounts  reported  for  minority 
interests  on  our  Consolidated  Balance  Sheets  represent  the  
portion  of  these  consolidated  entities’  equity  that  we  do  not 
own.  The  amounts  reported  for  minority  interests  on  our 
Consolidated Statements of Operations represent the portion of 
these consolidated entities’ net income not allocated to us.

Common units of the Operating Partnership (“common units”) 
are  substantially  similar  economically  to  our  common  shares  
of  beneficial  interest  (“common  shares”).  Common  units  not 
owned  by  us  are  also  exchangeable  into  our  common  shares, 
subject to certain conditions.

On  September  23,  2004,  we  issued  352,000  Series  I  Preferred 
Units  in  the  Operating  Partnership  to  an  unrelated  party  in 
connection with our acquisition of two properties in Northern 
Virginia.  These  units  have  a  liquidation  preference  of  $25.00 
per  unit,  plus  any  accrued  and  unpaid  distributions  of  return 
thereon  (as  described  below),  and  may  be  redeemed  for  cash  
by  the  Operating  Partnership  at  our  option  any  time  after 
September  22,  2019.  The  owner  of  these  units  is  entitled  to  a 
priority annual cumulative return equal to 7.5% of their liqui-
dation  preference  through  September  22,  2019;  the  annual 
cumulative preferred return increases for each subsequent five-
year period, subject to certain maximum limits. These units are 
convertible  into  common  units  on  the  basis  of  0.5  common 
units  for  each  Series  I  Preferred  Unit;  the  resulting  common 
units would then be exchangeable for common shares in accor-
dance with the terms of the Operating Partnership’s agreement 
of limited partnership.

Earnings Per Share (“EPS”)
We present both basic and diluted EPS. We compute basic EPS 
by  dividing  net  income  available  to  common  shareholders  by 
the  weighted  average  number  of  common  shares  outstanding 
during  the  year.  Our  computation  of  diluted  EPS  is  similar 
except that:

6565

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

•  the denominator is increased to include: (1) the weighted 
average number of potential additional common shares that 
would have been outstanding if securities that are convert-
ible  into  our  common  shares  were  converted;  and  (2)  the 
effect  of  dilutive  potential  common  shares  outstanding  
during the period attributable to share-based compensation 
using the treasury stock method; and

•   the  numerator  is  adjusted  to  add  back  any  convertible  
preferred  dividends  and  any  other  changes  in  income  or 
loss  that  would  result  from  the  assumed  conversion  into 
common shares.

Our computation of diluted EPS does not assume conversion of securities into our common shares if conversion of those securities 
would increase our diluted EPS in a given year. A summary of the numerator and denominator for purposes of basic and diluted 
EPS calculations is set forth below (dollars and shares in thousands, except per share data):

Numerator:
Income from continuing operations
Add (less): Gain (loss) on sales of real estate, net
Less: Preferred share dividends
Less: Issuance costs associated with redeemed preferred shares

Numerator for basic EPS from continuing operations
Add: Convertible preferred share dividends

Numerator for diluted EPS from continuing operations
Add: Income from discontinued operations, net
Less: Convertible preferred share dividends

Numerator for basic EPS on net income available to common shareholders
Add: Convertible preferred share dividends

For the Years Ended December 31,

2006

2005

2004

$  34,118
732
(15,404)
(3,896)

$  34,082
268
(14,615)
—

$  35,718
(113)
(16,329)
(1,813)

15,550
—

15,550
14,377
—

29,927
—

19,735
—

19,735
4,681
—

24,416
—

17,463
21

17,484
1,427
(21)

18,890
21

Numerator for diluted EPS on net income available to common shareholders

$  29,927

$  24,416

$  18,911

41,463
1,799
—

37,371
1,626
—

33,173
1,675
134

43,262

38,997

34,982

$ 

0.37
0.35

$ 

0.53
0.12

$ 

0.53
0.04

$ 

0.72

$ 

0.65

$ 

0.57

$ 

0.36
0.33

$ 

0.51
0.12

$ 

0.50
0.04

$ 

0.69

$ 

0.63

$ 

0.54

Denominator (all weighted averages):
Denominator for basic EPS (common shares)
Dilutive effect of share-based compensation awards
Assumed conversion of convertible preferred shares

Denominator for diluted EPS

Basic EPS:

Income from continuing operations
Income from discontinued operations

  Net income available to common shareholders

Diluted EPS

Income from continuing operations
Income from discontinued operations

  Net income available to common shareholders

6666

 
 
 
 
Our diluted EPS computations do not include the effects of the 
following  securities  since  the  conversions  of  such  securities 
would increase diluted EPS for the respective periods:

Weighted Average Shares 

in Denominator  
for the Years Ended 
December 31, 

2006

2005

2004

8,511

8,702

8,726

176
—

176
206

48
226

Conversion of weighted average  

common units

Conversion of weighted average  
convertible preferred units

Share-based compensation awards

As  discussed  in  Note  9,  the  Operating  Partnership  issued  on 
September  18,  2006  a  $200,000  aggregate  principal  amount  of 
3.50% Exchangeable Senior Notes due 2026. The notes have an 
exchange  settlement  feature  that  provides  that  the  notes  may, 
under  certain  circumstances,  be  exchangeable  for  cash  (up  to 
the  principal  amount  of  the  notes)  and,  with  respect  to  any 
excess exchange value, may be exchangeable into (at our option) 
cash,  our  common  shares  or  a  combination  of  cash  and  our 
common shares at an exchange rate of 18.4284 shares per $1,000 
principal amount of the notes (exchange rate is as of December 
31,  2006  and  is  equivalent  to  an  exchange  price  of  $54.30  per 
common share). The Exchangeable Senior Notes did not affect 
our  diluted  EPS  reported  above  since  the  weighted  average  
closing  price  of  our  common  shares  during  the  period  over 
which the notes were outstanding was less than $54.30.

Share-Based Compensation
We have historically issued two forms of share-based compen-
sation: share options and restricted shares. Prior to January 1, 
2006,  our  general  method  for  accounting  for  these  forms  of 
share-based compensation was as follows:

•   Share options: These awards were accounted for using the 
intrinsic  value  method.  Under  this  method,  we  recorded 
compensation  expense  only  when  the  exercise  price  of  a 
grant was less than the market price of our common shares 
on  the  option  grant  date;  when  this  occurred,  we  rec-
ognized  compensation  expense  equal  to  the  difference 
between the exercise price and the grant-date market price 
over the service period to which the options related.

•   Restricted  shares:  We  computed  compensation  expense 
for  restricted  share  grants  based  on  the  value  of  such 
grants, as determined by the value of our common shares 
on  the  applicable  measurement  date  (generally  the  date  
of  grant).  We  recognized  compensation  expense  for  such 
grants over the service periods to which the grants related 
based on the vesting schedules for such grants.

In December 2004, the Financial Accounting Standards Board 
(“FASB”)  issued  Statement  of  Financial  Accounting  Standards 
No. 123(R), “Share-Based Payment” (“SFAS 123(R)”). The state-
ment establishes standards for the accounting for transactions 
in  which  an  entity  exchanges  its  equity  instruments  for  goods 
or  services,  focusing  primarily  on  accounting  for  transactions 
in  which  an  entity  obtains  employee  services  in  share-based 
payment  transactions.  The  statement  requires  us  to  measure 
the cost of employee services received in exchange for an award 
of  equity  instruments  based  generally  on  the  fair  value  of  the 
award  on  the  grant  date;  such  cost  should  then  be  recognized 
over the period during which the employee is required to pro-
vide  service  in  exchange  for  the  award  (generally  the  vesting 
period). No compensation cost is recognized for equity instru-
ments for which employees do not render the requisite service. 
In 2005, the FASB also issued several FASB Staff Positions that 
clarify  certain  aspects  of  SFAS  123(R).  SFAS  123(R)  became 
effective  for  us  on  January  1,  2006,  applying  to  all  awards 
granted  after  January  1,  2006  and  to  awards  modified,  repur-
chased or cancelled after that date. We used the modified pro-
spective  application  approach  to  adoption  provided  for  under 
SFAS  123(R);  under  this  approach,  we  recognized  compensa-
tion  cost  on  or  after  January  1,  2006  for  the  portion  of  out-
standing  awards  for  which  the  requisite  service  was  not  yet 
rendered,  based  on  the  fair  value  of  those  awards  on  the  date  
of grant.

The  primary  effect  of  our  adoption  of  SFAS  123(R)  on  our 
Consolidated Financial Statements is that beginning January 1, 
2006 we are: (1) incurring higher expense associated with share 
options  issued  to  employees  relative  to  what  we  would  have  
recognized  under  the  intrinsic  value  method;  (2)  recognizing 
expenses associated with restricted common shares over the life 
of  the  grant  using  a  straight-line  basis  methodology  over  the 
service period; and (3) reporting the benefits of tax deductions 
in  excess  of  recognized  compensation  costs  as  cash  flow  from 
financing  activities  (such  benefits  were  previously  reported  as 
operating cash flows).

Prior to our adoption of SFAS 123(R), we provided disclosures 
in our financial statements for years prior to 2006 that summa-
rized  what  our  operating  results  would  have  been  if  we  had 
elected  to  account  for  our  share-based  compensation  under  
the fair value provisions of Statement of Financial Accounting 
Standards No. 123, “Accounting for Stock-Based Compensation” 
(“SFAS  123”).  In  computing  the  amounts  that  appeared  in  
these disclosures, we accounted for forfeitures as they occurred. 
SFAS  123(R)  requires  that  share-based  compensation  be  com-
puted based on awards that are ultimately expected to vest. As  
a result, future forfeitures of awards are to be estimated at the  

6767

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

time  of  grant  and  revised,  if  necessary,  in  subsequent  periods  
if  actual  forfeitures  differ  from  those  estimates.  SFAS  123(R) 
also requires that companies make a one-time cumulative effect 
adjustment upon adoption of the standard to record the effect 
that  estimated  future  forfeitures  of  outstanding  awards  would 
have  on  expenses  previously  recognized  in  the  companies’ 
financial statements; we did not record such a cumulative effect 
adjustment  since  we  determined  that  the  effect  of  pre-vesting 
forfeitures on our recorded expense has historically been negli-
gible.  The  amounts  included  in  our  Consolidated  Statements  
of  Operations  for  share-based  compensation  in  the  twelve 
months ended December 31, 2006 reflected an estimate of pre-
vesting forfeitures of approximately 5%.

In the disclosures that we provided in our financial statements 
for  years  prior  to  2006  that  summarized  what  our  operating 
results  would  have  been  if  we  had  elected  to  account  for  our 
share-based  compensation  under  the  fair  value  provisions  of 
SFAS  123,  we  did  not  capitalize  costs  associated  with  share-
based  compensation.  Effective  upon  our  adoption  of  SFAS 
123(R), we began capitalizing costs associated with share-based 
compensation  attributable  to  employees  engaged  in  construc-
tion and development activities.

On  November  10,  2005,  the  FASB  issued  FASB  Staff  Position 
No. FAS 123(R)-3, “Transition Election Related to Accounting 
for  Tax  Effects  of  Share-Based  Payment  Awards.”  We  elected  
to  adopt  the  alternative  transition  method  provided  in  this 
FASB Staff Position for calculating the tax effects of share-based 
compensation pursuant to SFAS 123(R). The alternative transi-
tion  method  includes  a  simplified  method  to  establish  the 
beginning balance of the additional paid-in capital pool related 
to the tax effects of employee share-based compensation, which 
is  available  to  absorb  tax  deficiencies  recognized  subsequent  
to the adoption of SFAS 123(R).

We compute the fair value of share options under SFAS 123(R) 
using  the  Black-Scholes  option-pricing  model.  Under  that 
model, the risk-free interest rate is based on the U.S. Treasury 
yield curve in effect at the time of grant. The expected option 
life  is  based  on  our  historical  experience  of  employee  exercise 
behavior. Expected volatility is based on historical volatility of 
our  common  shares.  Expected  dividend  yield  is  based  on  the 
average  historical  dividend  yield  on  our  common  shares  over  
a period of time ending on the grant date of the options.

Fair Value of Financial Instruments
Our  financial  instruments  include  primarily  notes  receivable, 
debt  and  interest  rate  derivatives.  The  carrying  or  contract  
values  of  notes  receivable  approximated  their  fair  values  at 
December 31, 2006 and 2005. You should refer to Notes 9 and 
10 for fair value of debt and derivative information.

Reclassification
We  reclassified  certain  amounts  from  the  prior  periods  to  
conform  to  the  current  period  presentation  of  our  Consoli-
dated  Financial  Statements.  These  reclassifications  did  not 
affect  previously  reported  consolidated  net  income  or  share-
holders’ equity.

Recent Accounting Pronouncement
See the section above entitled “Stock-Based Compensation” for 
disclosure pertaining to SFAS 123(R).

In  June  2005,  the  FASB  ratified  the  consensus  reached  by  the 
Emerging  Issues  Task  Force  (“EITF”)  regarding  EITF  04-05, 
“Determining  Whether  a  General  Partner,  or  the  General 
Partners as a Group, Controls a Limited Partnership or Similar 
Entity  When  the  Limited  Partners  Have  Certain  Rights.”  The 
conclusion  provided  a  framework  for  addressing  the  question  
of  when  a  general  partner,  as  defined  in  EITF  04-05,  should 
consolidate a limited partnership. Under the consensus, a gen-
eral  partner  is  presumed  to  control  a  limited  partnership  (or 
similar  entity)  and  should  consolidate  that  entity  unless  the 
limited  partners  possess  kick-out  rights  or  other  substantive 
participating  rights  as  described  in  EITF  96-16,  “Investor’s 
Accounting  for  an  Investee  When  the  Investor  has  a  Majority  
of  the  Voting  Interest  but  the  Minority  Shareholder  or  Share-
holders  Have  Certain  Approval  or  Veto  Rights.”  This  EITF  
was  initially  effective  for  all  new  limited  partnerships  formed 
and  for  existing  limited  partnerships  for  which  the  partner-
ship  agreements  were  modified  after  June  29,  2005,  and,  as  of 
January  1,  2006,  for  existing  limited  partnership  agreements. 
The EITF did not impact us in 2005. The adoption of this EITF 
in  2006  for  existing  limited  partnership  agreements  did  not 
have a material effect on our financial position, results of oper-
ations or cash flows.

In June 2006, the FASB issued Interpretation No. 48, “Account-
ing  for  Uncertainty  in  Income  Taxes—an  interpretation  of 
FASB  Statement  No.  109”  (“FIN  48”).  FIN  48  clarifies  the 
accounting  for  uncertainty  in  income  taxes  recognized  in  an 
enterprise’s  financial  statements  in  accordance  with  FASB 
Statement  No.  109,  “Accounting  for  Income  Taxes.”  FIN  48  
prescribes  a  recognition  threshold  and  measurement  attribute 
for  the  financial  statement  recognition  and  measurement  of  
a  tax  position  taken  or  expected  to  be  taken  in  a  tax  return.  
FIN 48 also provides guidance on de-recognition, classification, 
interest and penalties, accounting in interim periods, disclosure 
and  transition.  FIN  48  is  effective  for  fiscal  years  beginning 
after  December  15,  2006.  We  are  in  the  process  of  evaluating 
the  effect,  if  any,  that  implementing  FIN  48  will  have  on  our 
financial position, results of operations or cash flows.

6868

In  September  2006,  the  FASB  issued  Statement  of  Financial 
Accounting  Standards  No.  157,  “Fair  Value  Measurements” 
(“SFAS 157”). SFAS 157 defines fair value, establishes a frame-
work for measuring fair value in generally accepted accounting 
principles  and  expands  disclosures  about  fair  value  measure-
ments.  The  Statement  does  not  require  any  new  fair  value  
measurements  but  does  apply  under  other  accounting  pro-
nouncements  that  require  or  permit  fair  value  measurements. 
The  changes  to  current  practice  resulting  from  the  Statement 
relate to the definition of fair value, the methods used to mea-
sure  fair  value  and  the  expanded  disclosures  about  fair  value 
measurements.  SFAS  157  is  effective  for  financial  statements 
issued for fiscal years beginning after November 15, 2007, and 
interim  periods  within  those  fiscal  years,  with  earlier  appli-
cation encouraged. We do not expect that the adoption of this 
Statement will have a material effect on our financial position, 
results of operations or cash flows.

In  September  2006,  the  Securities  and  Exchange  Commission 
issued  Staff  Accounting  Bulletin  No.  108  (“SAB  108”),  which 
addresses  diversity  in  practice  in  quantifying  financial  state-
ment  misstatements  and  the  potential  under  current  practice 
for  the  build  up  of  improper  amounts  on  the  balance  sheet. 
There  have  historically  been  two  widely  recognized  methods 
for  quantifying  the  effects  of  financial  statement  errors:  the 
“roll-over”  method  and  the  “iron  curtain”  method.  The  roll-
over method focuses primarily on the impact of a misstatement 
on the income statement, including the reversing effect of prior 
year  misstatements,  but  its  use  can  lead  to  the  accumulation  
of  misstatements  on  the  balance  sheet.  Conversely,  the  iron-
curtain  method  focuses  primarily  on  the  effect  of  correcting 
the period end balance sheet with less emphasis on the revers-
ing  effects  of  prior  year  errors  on  the  income  statement.  SAB 
108  establishes  an  approach  that  requires  quantification  of 
financial  statement  errors  based  on  the  effects  of  the  error  on 
each  of  the  company’s  financial  statements  and  the  related 
financial  statement  disclosures.  This  model  is  commonly 
referred to as a “dual approach” because it requires quantifica-
tion  of  errors  under  both  the  iron-curtain  and  the  roll-over 
methods.  SAB  108  was  effective  for  financial  statements  for  
fiscal  years  ending  after  November  15,  2006.  Our  adoption  of 
SAB  108  did  not  have  a  material  effect  on  our  financial  posi-
tion, results of operations or cash flows.

3. CONCENTRATION OF RENTAL REVENUE

Major Tenants
The  following  table  summarizes  the  percentage  of  our  total 
rental revenue earned from (1) individual tenants that accounted 
for at least 5% of our total rental revenue and (2) the aggregate 
of  the  five  tenants  from  which  we  recognized  the  most  rental 
revenue in the respective years:

United States Government
Booz Allen Hamilton, Inc.
Computer Sciences Corporation
AT&T Local Services(1)
Five largest tenants

For the Years Ended 
December 31,

2006

2005

2004

13%
7%
N/A
N/A
32%

11%
6%
5%
N/A
30%

11%
5%
6%
6%
33%

(1)   Includes affiliated organizations and agencies.

Geographical Concentration
We derived large concentrations of our total revenue from real 
estate  operations  (defined  as  the  sum  of  rental  revenue  and  
tenant  recoveries  and  other  real  estate  operations  revenue)  
from  certain  geographic  regions.  The  table  below  sets  forth  
certain of these concentrations:

Percentage of  
Total Rental Revenue 
from Real Estate 
Operations for the Years 
Ended December 31,

2006

2005

2004

95%
78%
48%

99% 100%
79%
83%
49%
49%

Mid-Atlantic
Greater Washington, D.C.(1)
Baltimore/Washington Corridor

(1)   Comprised of our properties in the Baltimore/Washington Corridor (defined as 
the  Maryland  counties  of  Howard  and  Anne  Arundel),  Northern  Virginia 
(defined  as  Fairfax  County,  Virginia),  Suburban  Maryland  (defined  as  
the  Maryland  counties  of  Montgomery,  Prince  George’s  and  Frederick)  
and  St.  Mary’s  and  King  George  Counties  (located  in  Maryland  and  
Virginia, respectively).

Substantially all of our construction contract and service oper-
ations  revenues  were  derived  from  operations  in  the  Greater 
Washington, D.C. region.

6969

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

4. COMMERCIAL REAL ESTATE PROPERTIES

Operating properties consisted of the following:

December 31,

2006

2005

Land
Buildings and improvements

$  343,098
1,689,359

$  314,719
1,491,254

Land
Construction in progress

Less: accumulated depreciation

2,032,457
(219,574)

1,805,973
(174,935)

$ 1,812,883

$ 1,631,038

Projects  we  had  under  construction  or  development  consisted 
of the following:

December 31,

2006

2005

$  153,436
144,991

$  117,434
138,183

$  298,427

$  255,617

2006 Acquisitions
We acquired the following office properties in 2006:

Project Name

Location

North Creek
1915 & 1925 Aerotech Drive
7125 Columbia Gateway Drive

Colorado Springs, CO
Colorado Springs, CO
Columbia, MD(1)

(1)   Located in the Baltimore/Washington Corridor.

Date of  
Acquisition

5/18/2006
  6/8/2006
6/29/2006

Number of  
Buildings

Total Rentable  
Square Feet

3
2
1

6

324,549
75,892
611,379

1,011,820

The table below sets forth the allocation of the acquisition costs of the properties described above:

North Creek

1915 & 1925 
Aerotech Drive

7125 Columbia 
Gateway Drive

Initial  
Cost

$  41,508
8,378
74,168

$ 124,054

Total

$  20,974
87,286
18,888

127,148
(3,094)

$  2,735
34,161
5,694

42,590
(1,082)

$41,508

$1,113
6,161
1,235

8,509
(131)

$8,378

$17,126
46,964
11,959

76,049
(1,881)

$74,168

$ 124,054

•   a  six-acre  parcel  of  land  located  in  Hanover,  Maryland  
that  we  believe  can  support  approximately  60,000  
developable  square  feet  for  $2,141  on  February  28,  2006 
(Hanover,  Mar yland  is  located  in  t he  Ba ltimore /
Washington Corridor);

•   a  20-acre  parcel  of  land  located  in  Colorado  Springs, 
Colorado  that  we  believe  can  support  approximately 
300,000  developable  square  feet  for  $1,060  on  April  
21, 2006;

Land, operating properties
Building and improvements
Intangible assets on real estate acquisitions

Total assets
Deferred revenue associated with acquired operating leases

Total acquisition cost

We also acquired the following properties in 2006:

•   a property located in Colorado Springs, Colorado contain-
ing a 74,749 square foot building that will be redeveloped 
and a four-acre parcel of land that we believe can support 
approximately  30,000  developable  square  feet  for  $2,602 
on January 19, 2006;

•   a 31-acre parcel of land located in San Antonio, Texas that 
we believe can support approximately 375,000 developable 
square feet for $7,430 on January 20, 2006;

7070

 
•   a  153-acre  parcel  of  land  located  near  the  Indian  Head 
Naval  Surface  War  Center  in  Charles  County,  Maryland, 
with  a  value  upon  our  acquisition  of  $2,905,  on  October 
23,  2006  through  COPT-FD  Indian  Head,  LLC,  a  75% 
owned  consolidated  joint  venture  (Charles  County, 
Maryland is included in our “other” business segment).

We describe these joint ventures further in Note 5.

2006 Construction and Development Activities
During 2006, we had seven properties totaling 866,000 square 
feet  (four  located  in  the  Baltimore/Washington  Corridor  and 
one  each  in  Northern  Virginia,  Colorado  Springs,  Colorado 
and  St.  Mary’s  County,  Maryland)  become  fully  operational 
and  had  one  property  in  the  Baltimore/Washington  Corridor 
become  partially  operational  due  to  68,196  square  feet  being 
placed into service.

As  of  December  31,  2006,  we  had  construction  underway  
on  four  new  buildings  in  the  Baltimore/Washington  Corridor 
(including  the  partially  operational  property  discussed  above 
and  one  property  owned  through  a  50%  joint  venture)  and  
one each in Suburban Baltimore, Colorado Springs, Colorado, 
Chesterfield,  Virginia  and  Southwest  Virginia.  We  also  had 
development activities underway on five new buildings located 
in  the  Baltimore/Washington  Corridor  (including  one  owned 
through  a  joint  venture),  two  each  in  Suburban  Maryland  
and Colorado Springs, Colorado (one of which we own a 50%  
undivided  interest)  and  one  each  in  Suburban  Baltimore  and 
King George County, Virginia. In addition, we had redevelop-
ment underway on two wholly owned existing buildings (one is 
located  in  the  Baltimore/Washington  Corridor  and  one  in 
Colorado Springs) and two buildings owned by a joint venture 
(one is located in Northern Virginia and one in the Baltimore/
Washington Corridor).

•   a  13-acre  parcel  of  land  located  in  Colorado  Springs, 
Colorado  that  we  believe  can  support  approximately 
150,000  developable  square  feet  for  $2,263  on  May  
19, 2006;

•   a  178-acre  parcel  of  land  located  in  Annapolis  Junction, 
Maryland, located adjacent to the National Business Park, 
that  we  believe  can  support  approximately  1.25  million 
developable  square  feet  for  $26,833  on  June  29,  2006 
(Annapolis Junction, Maryland is located in the Baltimore/
Washington Corridor);

•   a five-acre parcel of land located in Columbia, Maryland 
that we believe can support approximately 120,000 devel-
opable square feet for $3,361 on June 29, 2006;

•   a  28-acre  parcel  of  land  located  in  Chesterfield,  Virginia 
on September 15, 2006 that was acquired under the terms 
of  a  lease  for  a  193,000  square  foot  building  that  we  are 
constructing  on  the  property  (Chesterfield,  Virginia, 
which is located in Greater Richmond, Virginia, is included 
in  our  “other”  business  segment).  The  fair  value  of  the 
land  and  closing  costs  associated  with  the  title  transfer 
totaled $1,303; and

•   approximately  500  acres  of  the  591-acre  former  Fort 
Ritchie  United  States  Army  base  located  in  Cascade, 
Washington  County,  Maryland  for  a  value  of  $5,576 
(Washington County, Maryland is included in our “other” 
business  segment);  we  expect  to  acquire  the  remaining  
91  acres  in  2007.  The  591-acre  parcel  is  anticipated  to 
accommodate  a  total  of  1.7  million  square  feet  of  office 
space  and  673  residential  units,  including  approximately 
306,000 square feet of existing office space and 110 exist-
ing rentable residential units.

In addition, we acquired the following properties through con-
solidated real estate joint ventures in 2006:

•   a  land  parcel  located  in  the  Baltimore/Washington  Cor-
ridor,  with  a  value  upon  our  acquisition  of  $4,564,  on 
February  10,  2006  through  Commons  Office  6-B,  LLC,  
a  50%  owned  consolidated  joint  venture  constructing  
an  office  property  totaling  approximately  44,000  square 
feet; and

7171

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

2006 Dispositions
We sold the following operating properties in 2006:

Project Name

Location

Lakeview at the Greens
68 Culver Road
710 Route 46
230 Schilling Circle
7 Centre Drive
Brown’s Wharf

Laurel, MD(1)
Dayton, NJ
Fairfield, NJ
Hunt Valley, MD(2)
Monroe, NJ
Baltimore, MD

Date  
of Sale

2/6/2006
3/8/2006
7/26/2006
8/9/2006
8/30/2006
9/28/2006

(1)   Located in the Suburban Maryland region.

(2)   Located in the Suburban Baltimore region.

We also sold the following in 2006:

Number of 
Buildings

Total Rentable 
Square Feet

2
1
1
1
1
1

7

141,783
  57,280
101,263
107,348
  19,468
104,203

531,345

Sale  
Price

$ 17,000
9,700
15,750
13,795
3,000
20,300

$ 79,545

Gain  
on Sale

$  2,087
335
4,498
951
684
8,476

$ 17,031

•   A newly constructed property in Columbia, Maryland for $2,530 on January 17, 2006. We recognized a gain of $111 on this 

sale; and

•   A two-acre parcel of land located in Linthicum Heights, Maryland for $900 on September 7, 2006. We recognized a gain of 

$165 on this sale.

2005 Acquisitions
We acquired the following office properties in 2005:

Project Name

Location

8611 Military Drive
Rockville Corporate Center
7175 Riverwood Drive
Gateway Crossing 95
Patriot Park I & II
1670 N. Newport Road
110 Thomas Johnson Drive
7015 Albert Einstein Drive
Interquest 3 & 4
Hunt Valley/Rutherford portfolios

San Antonio, TX
Rockville, MD(1)
Columbia, MD(2)
Columbia, MD(2)
Colorado Springs, CO
Colorado Springs, CO
Frederick, MD(1)
Columbia, MD(2)
Colorado Springs, CO
Hunt Valley/Woodlawn, MD(3)

(1)   Located in the Suburban Maryland region.

(2)   Located in the Baltimore/Washington Corridor region.

(3)   Located in the Suburban Baltimore region.

During  2005,  we  entered  into  a  joint  venture  called  COPT 
Opportunity  Invest  I,  LLC  in  which  we  have  a  92.5%  owner-
ship interest. This joint venture identifies and acquires proper-
ties  to  renovate  into  Class  A  office  space  and  completes  such 
renovations.  We  use  the  consolidation  method  of  accounting  
to  account  for  our  investment  in  this  entity.  On  December  
20,  2005,  we  acquired  the  following  properties  through  this 
joint venture:

7272

Date of  
Acquisition

Number of 
Buildings

Total Rentable 
Square Feet

3/30/2005
4/7/2005
7/27/2005
9/19/2005
9/28/2005
9/30/2005
10/21/2005
12/1/2005
12/22/2005
12/22/2005

2
2
1
5
2
1
1
1
2
21

38

468,994
221,702
26,500
188,819
135,907
67,500
117,803
61,203
113,170
1,106,866

2,508,464

Initial  
Cost

$  30,845
37,617
2,456
26,060
17,949
9,056
16,099
9,428
11,443
123,988

$ 284,941

•   2900 Towerview Road, located in Herndon, Virginia (which is 
in the Northern Virginia region), for an initial cost of $12,372. 
The  property  includes  a  61,000  square  foot  office  building 
with an attached 79,000 square foot warehouse building that 
the joint venture plans to convert to office space. The prop-
erty also includes an additional four-acre land parcel that can 
support the future development; and

•   7468  Candlewood  Road,  located  in  Columbia,  Maryland 
(which is in the Baltimore/Washington Corridor), for an ini-
tial  cost  of  $19,222.  The  property  includes  a  472,000  square 
foot warehouse building that the joint venture plans to con-
vert into two office buildings totaling 325,000 square feet.

The table below sets forth the allocation of the acquisition costs of the properties described above:

8611 
Military 
Drive

Rockville 
Corporate 
Center

7175 
Riverwood 
Drive

Gateway 
Crossing 
95

Patriot 
Park  
I & II

1670  
N. Newport 
Road

110 
Thomas 
Johnson 
Drive

7015 
Albert 
Einstein 
Drive

9950 & 
9960 
Federal 
Drive

Hunt 
Valley/
Rutherford

2900 
Towerview 
Road

7468 
Candlewood 
Road

Total

$11,007

$  6,222

$1,788

$  5,533

$  1,303

$   851

$  2,810

$2,054

$  1,572

$  18,715

$  3,207

$       — $  55,062

—

—

—

—

—

—

—

—

—

—

1,261

5,598

6,859

19,838

28,925

763

17,582

14,333

6,989

12,075

6,084

8,913

87,933

4,467

—

207,902

—

—

—

—

—

—

—

—

—

—

3,526

13,624

17,150

—

4,004

113

3,317

2,358

30,845

39,151

2,664

26,432

17,994

1,216

9,056

1,214

1,290

1,678

20,527

1,412

—

37,129

16,099

9,428

12,163

127,175

13,873

19,222

324,102

—

(1,534)

(208)

(372)

(45)

—

—

—

(720)

(3,187)

(1,501)

—

(7,567)

Land, operating  
properties

Land, construction  
or development

Building and  

improvements
Construction in  
progress

Intangible assets  
on real estate  
acquisitions

Total assets
Deferred revenue asso-
ciated with acquired 
operating leases

Total acquisition cost

$30,845

$37,617

$2,456

$26,060

$ 17,949

$9,056

$16,099

$9,428

$ 11,443

$123,988

$12,372

$19,222

$ 316,535

We also acquired the following in 2005:

•   a 19-acre parcel of land located in Chantilly, Virginia that 
is  adjacent  to  existing  properties  we  own  for  $7,141  on 
January  27,  2005  (Chantilly,  Virginia  is  located  in  the 
Northern Virginia region). We expect to develop this land 
parcel in the future;

•   a 32-acre parcel of land located in Dahlgren, Virginia that 
is  adjacent  to  one  of  our  office  properties  for  $1,227  on 
March  16,  2005  (Dahlgren,  Virginia  is  located  in  the  
St.  Mary’s  and  King  George  Counties  region).  We  expect 
to develop this land parcel in the future;

•   a  16-acre  parcel  of  land  adjacent  to  8611  Military  Drive  
in  San  Antonio,  Texas  for  $3,013  on  March  30,  2005.  We 
expect  to  operate  this  land  parcel  as  part  of  the  campus 
that includes 8611 Military Drive;

•   a  10-acre  parcel  of  land  adjacent  to  the  Rockville  Cor-
porate Center for $6,234 on April 7, 2005. We commenced 
development on a portion of this land parcel in 2006;

•   a 27-acre parcel of land adjacent to 8611 Military Drive in 
San Antonio, Texas for $5,893 on June 14, 2005. We expect 
to develop this land parcel in the future;

•   a two-acre parcel of land located in Linthicum, Maryland 
that is adjacent to one of our office properties for $735 on 
July 6, 2005;

•   a  64-acre  land  parcel  located  in  Colorado  Springs, 
Colorado,  five  acres  of  which  is  undergoing  construction 
of  a  50,000  square  foot,  fully-leased  building,  for  a  pur-
chase price of $9,408 on July 8, 2005. We expect to develop 
this land parcel in the future;

•   a four-acre parcel of land located in Columbia, Maryland 
that  is  adjacent  to  7175  Riverwood  Drive  for  $1,367  on  
July  27,  2005.  We  commenced  development  on  a  portion 
of this land parcel in 2006;

•   a 50% undivided interest in a 132-acre land parcel, subject 
to a cotenancy agreement, in Colorado Springs, Colorado 
for $10,757 on September 28, 2005. We commenced devel-
opment on a portion of this land parcel in 2006; and

•   a  six-acre  parcel  of  land  located  in  Frederick,  Maryland 
that  is  adjacent  to  110  Thomas  Johnson  Drive  for  $1,092 
on  October  21,  2005.  We  commenced  development  on  a 
portion of this land parcel in 2006.

In  2004,  we  sold  a  land  parcel  in  Columbia,  Maryland  and  a 
land parcel in Linthicum, Maryland for an aggregate of $9,600. 
We issued to the buyer a $5,600 mortgage loan; the balance of 
the  acquisition  was  in  the  form  of  cash  from  the  buyer.  The 
buyer  in  this  transaction  had  an  option  to  contribute  the  two 
land parcels into our Operating Partnership between January 1, 
2005  and  February  28,  2005  in  exchange  for  extinguishment  
of  the  $5,600  mortgage  loan  with  us  and  common  units  in  

7373

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

our  Operating  Partnership;  the  buyer  exercised  its  option  in 
February 2005 and, as a result, on April 18, 2005, the debt from 
us was essentially extinguished and the buyer received 142,776 
common  units  in  the  Operating  Partnership  valued  at  $3,697. 
We  accounted  for  the  2004  transaction  using  the  financing 
method of accounting; as a result, the 2004 sale transaction was 
not recorded as a sale and the $4,000 in net proceeds received 
from the buyer was recorded as a liability prior to the contribu-
tion of the land parcels back into the Operating Partnership in 
April 2005.

2005 Construction and Pre-Construction Activities
During  2005,  we  placed  into  service  two  buildings  located  
in  Annapolis  Junction,  Maryland  and  one  in  Columbia, 
Maryland.

As  of  December  31,  2005,  we  had  construction  underway  on  
six  new  buildings  in  the  Baltimore/Washington  Corridor,  
one in Northern Virginia, one in St. Mary’s County, Maryland 
and  one  in  Colorado  Springs,  Colorado.  We  also  had  pre- 
construction activities underway on four new buildings located 
in  the  Baltimore/Washington  Corridor,  one  in  King  George 
County,  Virginia,  and  one  in  Colorado  Springs,  Colorado.  
We  had  redevelopment  underway  on  (1)  one  wholly  owned 
existing  building  in  the  Baltimore/Washington  Corridor  and 
(2)  two  buildings  owned  by  a  joint  venture  (one  is  located  in 
Northern Virginia and the other in the Baltimore/Washington 
Corridor).

2005 Dispositions
On June 10, 2005, we sold a four-acre parcel of land located in 
Columbia, Maryland for $2,571. We recognized a gain of $186 
on this sale.

On  August  31,  2005,  we  sold  a  newly  constructed  property  in 
Columbia,  Maryland  for  $4,794.  We  recognized  a  gain  of  $82 
on this sale.

On September 8, 2005, we sold three office properties totaling 
152,731 square feet located in the Northern/Central New Jersey 
region  for  a  total  sale  price  of  $22,458.  We  recognized  a  total 
gain of $4,324 on this sale.

On September 29, 2005, we contributed our portfolio of prop-
erties  in  Harrisburg,  Pennsylvania,  consisting  of  16  office  
properties,  one  unimproved  land  parcel  and  an  option  to 
acquire a land parcel, into a real estate joint venture at a value  
of  $73,000.  In  exchange  for  our  contribution,  we  received 
$69,587  in  cash  (after  closing  costs  and  operating  prorations) 
and a 20% interest in Harrisburg Corporate Gateway Partners, 
L.P. As part of this transaction, we entered into an agreement to 
manage  the  operations  of  the  joint  venture’s  properties  for  a 
five-year term. We did not recognize a gain on this transaction 
since  we  have  certain  contingent  obligations  that  may  exceed 
our  proportionate  interest  remaining  in  effect  as  long  as  we 
continue to manage the properties; these contingent obligations 
are described below in Note 19.

5. REAL ESTATE JOINT VENTURES

Our investments in and advances to unconsolidated real estate joint ventures accounted for using the equity method of accounting 
included the following:

Balance at  
December 31,

2006

2005

Date Acquired Ownership Nature of Activity

Total Assets 
at 12/31/2006

Maximum 
Exposure
to Loss(1)

Harrisburg Corporate Gateway 

Partners, L.P.
Route 46 Partners

$(3,614)(2)

—

$(3,081)(2)
1,451(4)

9/29/2005
3/14/2003

20%
20%

Operates 16 buildings(3)
Operates one building(5)

$75,895
$       —

$—
N/A

(1)   Derived  from  the  sum  of  our  investment  balance  and  maximum  additional  unilateral  capital  contributions  or  loans  required  from  us.  Not  reported  above  
are additional amounts that we and our partner are required to fund when needed by this joint venture; these funding requirements are proportional to our respective 
ownership percentages. Also not reported above are additional unilateral contributions or loans from us, the amounts of which are uncertain, that would be due if certain 
contingent events occurred.

(2)   The carrying amount of our investment in this joint venture is lower than our share of the equity in the joint venture by $5,072 at December 31, 2006 and $5,204 at 
December 31, 2005 due to our deferral of gain on the contribution by us of real estate into the joint venture upon its formation. This difference will continue to exist to 
the extent the nature of our continuing involvement in the joint venture does not change.

(3)   This joint venture’s property is located in Greater Harrisburg, Pennsylvania.

(4)   As  discussed  further  below,  the  joint  venture  sold  the  property  on  July  26,  2006,  after  which  the  joint  venture  was  dissolved.  The  carrying  amount  of  our  
investment in this joint venture was lower than our share of the equity in the joint venture by $1,370 at December 31, 2005 due to our deferral of gain on the contribution 
by us of real estate into the joint venture upon its formation.

(5)   This joint venture’s property was located in Fairfield, New Jersey.

7474

On  July  26,  2006,  Route  46  Partners  sold  its  property  for 
$27,000.  After  the  sale,  the  joint  venture  was  dissolved.  We  
recognized  a  gain  of  $563  on  the  disposition  of  our  joint  
venture interest.

A  two-member  management  committee  is  responsible  for  
making major decisions (as defined in the joint venture agree-
ment)  for  Harrisburg  Corporate  Gateway  Partners,  L.P.,  and  
we  control  one  of  its  management  committee  positions.  We 
have additional commitments pertaining to our real estate joint 
venture that are disclosed in Note 19.

The  following  table  sets  forth  a  combined  condensed  balance 
sheet for our unconsolidated joint ventures:

Commercial real estate property
Other assets

  Total assets

Liabilities
Owners’ equity

December 31,

2006

2005

$ 72,688
3,207

$  94,552
8,006

$ 75,895

$ 102,558

$ 67,350
8,545

$  82,550
20,008

  Total liabilities and owners’ equity

$ 75,895

$ 102,558

The following table sets forth a combined condensed statement 
of operations for Harrisburg Corporate Gateway Partners, L.P. 
and Route 46 Partners:

Revenues
Property operating expenses
Interest expense
Depreciation and amortization 

expense
Gain on sale

Net income

For the Years Ended  
December 31,

2006

2005

2004

$ 11,521
(4,067)
(4,224)

$  5,850
(2,351)
(1,843)

$  3,054
(1,461)
(847)

(4,464)
4,032

(1,490)
—

(514)
—

$  2,798

$  166

$  232

The  table  above  includes  net  income  from  Route  46  Partners  
of  $3,501  for  2006,  the  year  in  which  it  was  dissolved.  Our  
joint  venture  partner  in  Route  46  Partners  had  preference  in 
receiving  distributions  of  cash  flows  for  a  defined  return.  We 
were  not  entitled  to  receive  distributions  for  a  defined  return 
until  our  partner  received  its  defined  return.  We  did  not  rec-
ognize  income  from  our  investment  in  Route  46  Partners  in 
2004,  2005  and  2006  until  the  dissolution  of  the  entity  since  
the income earned by the entity in those periods did not exceed 
our  partner’s  defined  return  until  that  point  in  time.  Upon  
dissolution  of  the  entity,  we  recognized  income  from  our  
investment  of  $60,  excluding  the  $563  gain  on  disposition  of 
the joint venture interest discussed above.

As  described  in  Note  4,  we  acquired  the  following  interests  
in consolidated real estate joint ventures in 2005 and 2006:

•   a 92.5% interest in COPT Opportunity Invest I, LLC. This 
joint  venture  identifies  and  acquires  properties  to  reno-
vate  into  Class  A  office  space  and  complete  such  renova-
tions. On December 20, 2005, we acquired two properties 
through this joint venture;

•   a 50% interest in Commons Office 6-B, LLC. On February 
10,  2006,  this  entity  acquired  a  land  parcel  located  in 
Hanover,  Maryland,  on  which  an  office  property  total-
ing  approximately  44,000  square  feet  is  under  construc-
tion; and

•   a  75%  interest  in  COPT–FD  Indian  Head,  LLC.  This  
entity  acquired  a  153-acre  land  parcel  located  near  the 
Indian Head Naval Surface War Center in Charles County, 
Maryland on October 23, 2006.

The table below sets forth information pertaining to our investments in consolidated joint ventures at December 31, 2006:

COPT Opportunity Invest I, LLC
Commons Office 6-B, LLC
MOR Forbes 2 LLC
COPT-FD Indian Head, LLC

Date  
Acquired

12/20/2005
  2/10/2006
12/24/2002
10/23/2006

Ownership 
% at  
12/31/2006

92.5%
50.0%
50.0%
75.0%

Nature of Activity

Redeveloping two properties(1)
Developing land parcel(2)
Developing land parcel(3)
Developing land parcel(4)

Total Assets at 
12/31/2006

Collateralized 
Assets at 
12/31/2006

$41,696
    7,287
    4,155
    2,969

$56,107

$       —
7,287
3,734
—

$11,021

(1)   This joint venture owns one property in the Northern Virginia region and one in the Baltimore/Washington Corridor region.

(2)   This joint venture’s property is located in Hanover, Maryland (located in the Baltimore/Washington Corridor region).

(3)   This joint venture’s property is located in Lanham, Maryland (located in the Suburban Maryland region).

(4)   This joint venture’s property is located in Charles County, Maryland (included in our “other” business segment).

Our commitments and contingencies pertaining to our real estate joint ventures are disclosed in Note 19.

7575

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

6. INTANGIBLE ASSETS ON REAL ESTATE ACQUISITIONS

Intangible assets on real estate acquisitions consisted of the following:

Lease-up value
Lease cost portion of deemed cost avoidance
Lease to market value
Tenant relationship value
Market concentration premium

December 31, 2006

December 31, 2005

Gross 
Carrying 
Amount

$105,719
12,880
10,623
9,371
1,333

$139,926

Accumulated 
Amortization

$38,279
5,819
7,178
1,178
147

$52,601

Net 
Carrying 
Amount

$67,440
7,061
3,445
8,193
1,186

Gross 
Carrying 
Amount

$  92,812
11,054
9,772
6,349
1,333

$87,325

$121,320

Accumulated 
Amortization

$20,824
3,991
5,277
130
114

$30,336

Net 
Carrying 
Amount

$71,988
7,063
4,495
6,219
1,219

$90,984

8. PREPAID AND OTHER ASSETS

Prepaid and other assets consisted of the following:

Construction contract costs incurred  

in excess of billings

Furniture, fixtures and equipment
Prepaid expenses
Other assets

Prepaid and other assets

December 31,

2006

2005

$ 18,324
10,495
9,059
10,589

$ 15,277
4,302
7,007
8,592

$ 48,467

$ 35,178

Amortization of the intangible asset categories set forth above 
totaled $20,675 in 2006, $12,525 in 2005 and $9,739 in 2004. 
The  approximate  weighted  average  amortization  periods  of  
the  categories  set  forth  below  follow:  lease-up  value:  11  years; 
lease cost portion of deemed cost avoidance: six years; lease to 
market value: five years; tenant relationship value: nine years; 
and market concentration premium: 36 years. The approximate 
weighted  average  amortization  period  for  all  of  the  categories 
combined  is  10  years.  Estimated  amortization  expense  asso-
ciated  with  the  intangible  asset  categories  set  forth  above  for 
2007 is $14.3 million, 2008 is $12.7 million, 2009 is $11.4 mil-
lion, 2010 is $8.4 million and 2011 is $6.6 million.

7. DEFERRED CHARGES

Deferred charges consisted of the following:

Deferred leasing costs
Deferred financing costs
Goodwill
Deferred other

Accumulated amortization

Deferred charges, net

December 31,

2006

2005

$  52,263
28,275
1,853
155

$  42,752
21,574
1,853
155

82,546
(38,836)

66,334
(31,288)

$  43,710

$  35,046

7676

9. DEBT

Our debt consisted of the following:

Maximum 
Principal Amount 
Under Debt at 
December 31, 2006

Carrying Value  
at December 31,

2006

2005

Stated Interest 
Rates at 
December 31, 2006

Scheduled 
Maturity Dates at 
December 31, 2006

Mortgage and other loans payable:
  Revolving Credit Facility

 Wachovia Bank, N.A. Revolving  

Credit Facility

$500,000

$  185,000

$  273,000

  Mortgage Loans
  Fixed rate mortgage loans(2)
 Variable rate construction  

loan facilities

  Other variable rate mortgage loans

  Total mortgage loans

  Note Payable
  Unsecured seller notes

 Total mortgage and other  

loans payable

3.5% Exchangeable Senior Notes

  Total debt

LIBOR + 1.15%  
to 1.55%

March 2008(1)

3.00%–9.48%(3)
LIBOR + 1.40%  
to 2.20%
LIBOR + 1.20%  
to 1.50%

2007–2034(4)

2007–2008(5)

September 2007(6)

N/A

1,020,619

921,265

56,079

70,238

34,500

82,800

$1,111,198

1,074,303

72,207

N/A

N/A

N/A

2,339

1,048

0%–5.95%

2007–2008

1,298,537
200,000

1,348,351
—

$ 1,498,537

$ 1,348,351

3.50%

September 2026(7)

(1)   The Revolving Credit Facility may be extended for a one-year period, subject to certain conditions.

(2)   Several  of  the  fixed  rate  mortgages  carry  interest  rates  that  were  above  or  below  market  rates  upon  assumption  and  therefore  are  recorded  at  their  fair  value  
based  on  applicable  effective  interest  rates.  The  carrying  values  of  these  loans  ref lect  net  premiums  totaling  $210  at  December  31,  2006  and  $1,391  at  
December 31, 2005.

(3)   The weighted average interest rate on these loans was 5.6% at December 31, 2006.

(4)   A loan with a balance of $4,893 at December 31, 2006 that matures in 2034 may be repaid in March 2014, subject to certain conditions.

(5)   At December 31, 2006, $33,447 in loans scheduled to mature in 2008 may be extended for a one-year period, subject to certain conditions.

(6)   At December 31, 2006, the $34,500 loan scheduled to mature in 2007 may be extended for a one-year period, subject to certain conditions.

(7)   Refer to the paragraph below for descriptions of provisions for early redemption and repurchase of these notes.

On  September  18,  2006,  the  Operating  Partnership  issued  a 
$200,000  aggregate  principal  amount  of  3.50%  Exchangeable 
Senior  Notes  due  2026.  Interest  on  the  notes  is  payable  on 
March  15  and  September  15  of  each  year.  The  notes  have  an 
exchange  settlement  feature  that  provides  that  the  notes  may, 

under  certain  circumstances,  be  exchangeable  for  cash  (up  to 
the  principal  amount  of  the  notes)  and,  with  respect  to  any 
excess exchange value, may be exchangeable into (at our option) 
cash,  our  common  shares  or  a  combination  of  cash  and  our 
common  shares  at  an  exchange  rate  (subject  to  adjustment)  

7777

 
 
 
 
 
 
notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

of  18.4284  shares  per  $1,000  principal  amount  of  the  notes 
(exchange rate is as of December 31, 2006 and is equivalent to 
an  exchange  price  of  $54.30  per  common  share).  On  or  after 
September  20,  2011,  the  Operating  Partnership  may  redeem  
the notes in cash in whole or in part. The holders of the notes  
have the right to require us to repurchase the notes in cash in 
whole or in part on each of September 15, 2011, September 15, 
2016 and September 15, 2021, or in the event of a “fundamental 
change,”  as  defined  under  the  terms  of  the  notes,  for  a  repur-
chase price equal to 100% of the principal amount of the notes 
plus accrued and unpaid interest. Prior to September 11, 2011, 
subject  to  certain  exceptions,  if  (1)  a  “fundamental  change” 
occurs  as  a  result  of  certain  forms  of  transactions  or  series  
of transactions and (2) a holder elects to exchange its notes in 
connection  with  such  “fundamental  change,”  we  will  increase 
the  applicable  exchange  rate  for  the  notes  surrendered  for 
exchange  by  a  number  of  additional  shares  of  our  common 
shares  as  a  “make  whole  premium.”  The  notes  are  general  
unsecured senior obligations of the Operating Partnership and 
rank  equally  in  right  of  payment  with  all  other  senior  
unsecured  indebtedness  of  the  Operating  Partnership.  The 
Operating  Partnership’s  obligations  under  the  notes  are  fully 
and unconditionally guaranteed by us.

In  the  case  of  each  of  our  mortgage  loans,  we  have  pledged  
certain  of  our  real  estate  assets  as  collateral.  As  of  December  
31,  2006,  a  majority  of  our  real  estate  properties  were  collat-
eralized  on  loan  obligations  or,  in  the  case  of  our  Revolving 
Credit Facility with Wachovia Bank, National Association (the 
“Revolving Credit Facility”), identified by us to support repay-
ment of the loan. Certain of our debt instruments require that 
we  comply  with  a  number  of  restrictive  financial  covenants, 
including adjusted consolidated net worth, minimum property 
interest coverage, minimum property hedged interest coverage, 
minimum  consolidated  interest  coverage,  maximum  consoli-
dated unhedged floating rate debt and maximum consolidated 
total indebtedness. As of December 31, 2006, we were in com-
pliance with these financial covenants.

Our debt matures on the following schedule:

2007
2008
2009
2010
2011
Thereafter

Total

$  140,950
375,208
61,791
73,128
108,854
738,396

$ 1,498,327(1)

(1)   Represents  principal  maturities  only  and  therefore  excludes  net  premiums  

of $210.

We  estimate  that  the  fair  value  of  our  debt  was  $1,510,698  at 
December 31, 2006 and $1,345,789 at December 31, 2005.

Weighted  average  borrowings  under  our  Revolving  Credit 
Facility  totaled  $290,660  in  2006  and  $272,267  in  2005.  The 
weighted average interest rate on this credit facility was 6.42% 
in 2006 and 4.62% in 2005.

On  June  24,  2005,  we  amended  our  Revolving  Credit  Facility. 
Under  the  amendment,  the  maximum  principal  amount  was 
increased  from  $300,000  to  $400,000,  with  a  right  to  further 
increase  the  maximum  principal  amount  in  the  future  to 
$600,000, subject to certain conditions. In addition, the sched-
uled  maturity  date  was  extended  for  one  year  to  March  2008, 
with  a  one-year  extension  available,  subject  to  certain  con-
ditions. On July 3, 2006, we exercised our right to increase the 
borrowing  capacity  under  our  Revolving  Credit  Facility  from 
$400,000  to  $500,000.  The  borrowing  capacity  under  the 
Revolving Credit Facility is generally computed based on 65% 
of the value of assets identified by us to support repayment of 
the  loan.  As  of  December  31,  2006,  the  maximum  amount  of 
borrowing  capacity  under  this  line  of  credit  totaled  $431,500,  
of which $245,500 was available.

We capitalized interest costs of $14,559 in 2006, $9,871 in 2005 
and $5,112 in 2004.

10. DERIVATIVES

The following table sets forth our derivative contracts and their respective fair values:

Nature of Derivative

Interest rate swap
Interest rate swap
Interest rate swap
Forward starting swap

7878

Notional  One-Month 
LIBOR Base
Amount

Effective
Date

Expiration
Date

$50,000
  25,000
  25,000
  73,400

5.0360%
5.2320%
5.2320%
5.0244%

3/28/2006
  5/1/2006
  5/1/2006
7/15/2005

3/30/2009
5/1/2009
5/1/2009
N/A

Fair Value at 
December 31,

2006

2005

$  (42)
(133)
(133)
N/A

$ (308)

N/A
N/A
N/A
N/A

$—

We designated these derivatives as cash flow hedges. The first three contracts set forth above hedge the risk of changes in interest 
rates on certain of our one-month LIBOR-based variable rate borrowings until their respective maturities. The last contract set 
forth above represents a forward starting swap into which we entered to lock in the 10-year LIBOR swap rate in contemplation of 
our  obtaining  a  long-term,  fixed  rate  financing  later  in  2005.  We  obtained  this  long-term  financing  in  October  2005  and  cash  
settled  the  swap  at  that  time  for  a  payment  of  $603.  This  payment  represented  the  present  value  of  the  basis  point  differential 
between 5.0244% and the 10-year LIBOR swap rate at the time we cash settled the swap, plus accrued interest.

The table below sets forth our accounting application of changes in derivative fair values:

(Decrease) increase in fair value applied to AOCL(1) and minority interests
Increase in fair value recognized as gain(2)

(1)   AOCL is defined in Note 2.

(2)   Included in interest expense on our Consolidated Statements of Operations.

For the Years Ended 
December 31,

2006

2005

2004

$(308)
—

$— $390
77
—

The $603 discussed above that we paid to cash settle the forward starting swap was recorded to AOCL and will be amortized into 
interest expense over the 10-year term of the loan it was hedging.

11. SHAREHOLDERS’ EQUITY

Preferred Shares

Preferred shares of beneficial interest (“preferred shares”) consisted of the following:

1,265,000 designated as Series E Cumulative Redeemable Preferred Shares of beneficial interest  

(1,150,000 shares issued with an aggregate liquidation preference of $28,750)

1,425,000 designated as Series F Cumulative Redeemable Preferred Shares of beneficial interest  

(1,425,000 shares issued with an aggregate liquidation preference of $35,625)

2,200,000 designated as Series G Cumulative Redeemable Preferred Shares of beneficial interest  

(2,200,000 shares issued with an aggregate liquidation preference of $55,000)

2,000,000 designated as Series H Cumulative Redeemable Preferred Shares of beneficial interest  

(2,000,000 shares issued with an aggregate liquidation preference of $50,000)

3,390,000 designated as Series J Cumulative Redeemable Preferred Shares of beneficial interest  

(3,390,000 shares issued with an aggregate liquidation preference of $84,750)

Total preferred shares

December 31,

2006

2005

$—

$11

—

22

20

34

$76

14

22

20

—

$67

Set forth below is a summary of additional information pertaining to our preferred shares of beneficial interest:

Series of Preferred Shares  
of Beneficial Interest

Series E
Series F
Series G
Series H
Series J

(1)   Yield computed based on $25 per share redemption price.

(2)   All outstanding Series E Preferred Shares were redeemed on July 15, 2006.

(3)   All outstanding Series F Preferred Shares were redeemed on October 15, 2006.

# of  
Shares 
Issued

1,150,000
1,425,000
2,200,000
2,000,000
3,390,000

Month of 
Issuance

April 2001
September 2001
August 2003
December 2003
July 2006

Annual 
Dividend 
Yield(1)

Annual 
Dividend 
per Share

Earliest 
Redemption 
Date

10.250%
  9.875%
  8.000%
  7.500%
  7.625%

2.56250
2.46875
2.00000
1.87500
1.90625

NA(2)
NA(3)
8/11/2008
12/18/2008
7/20/2011

7979

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

All of the classes of preferred shares set forth in the table above 
are  nonvoting  and  redeemable  for  cash  at  $25.00  per  share  at 
our option on or after the earliest redemption date. Holders of 
these shares are entitled to cumulative dividends, payable quar-
terly (as and if declared by the Board of Trustees). In the case  
of  each  series  of  preferred  shares,  there  is  a  series  of  preferred 
units  in  the  Operating  Partnership  owned  by  us  that  carries 
substantially the same terms.

On  July  15,  2006,  we  redeemed  all  of  the  outstanding  10.25% 
Series E Cumulative Redeemable Preferred Shares of beneficial 
interest  (the  “Series  E  Preferred  Shares”)  at  a  price  of  $25  per 
share, or $28,750. On October 15, 2006, we redeemed all of the 
outstanding Series F Cumulative Redeemable Preferred Shares 
of beneficial interest (the “Series F Preferred Shares”) at a price 
of $25 per share, or $35,625. We recognized a $3,896 decrease  
to net income available to common shareholders pertaining to 
the original issuance costs incurred on the Series E and Series F 
Preferred Shares at the time of the redemption.

On July 20, 2006, we completed the sale of 3.39 million Series J 
Cumulative  Redeemable  Preferred  Shares  (the  “Series  J  Pre-
ferred  Shares”)  at  a  price  of  $25.00  per  share.  We  contributed 
the  net  proceeds  after  offering  costs  totaling  $81,857  to  our 
Operating  Partnership  in  exchange  for  3.39  million  Series  J 
Preferred  Units.  The  Series  J  Preferred  Units  carry  terms  that 
are substantially the same as the Series J Preferred Shares.

Common Shares
In  September  2005,  we  sold  2.3  million  common  shares  to  an 
underwriter  at  a  net  price  of  $32.76  per  share.  We  contrib-
uted  the  net  proceeds  after  offering  costs  totaling  $75,170  to  
our  Operating  Partnership  in  exchange  for  2.3  million  com-
mon units.

In April 2006, we sold 2.0 million common shares to an under-
writer at a net price of $41.31 per share. We contributed the net 
proceeds after offering costs totaling $82,433 to our Operating 
Partnership in exchange for 2.0 million common units.

Over the three years ended December 31, 2006, common units 
in  our  Operating  Partnership  were  converted  into  common 
shares on the basis of one common share for each common unit 
in the amount of 245,793 in 2006, 253,575 in 2005 and 326,108 
in 2004.

See Note 12 for disclosure of common share activity pertaining 
to our share-based compensation plans.

Accumulated Other Comprehensive Loss
The  table  below  sets  forth  activity  in  the  accumulated  other 
comprehensive loss component of shareholders’ equity:

Beginning balance
Unrealized (loss) gain on deriva-
tives, net of minority interests

Realized loss on derivatives,  
net of minority interests

For the Years Ended  
December 31,

2006

2005

2004

$  (482)

$  — $  (294)

(262)

(482)

294

51

—

—

Ending balance

$  (693)

$  (482)

$  —

The table below sets forth our comprehensive income:

Net income
Unrealized (loss) gain on deriva-
tives, net of minority interests

Realized loss on derivatives,  
net of minority interests

For the Years Ended  
December 31,

2006

2005

2004

$ 49,227

$ 39,031

$ 37,032

(262)

(482)

294

51

—

—

Total comprehensive income

$ 49,016

$ 38,549

$ 37,326

12.  SHARE-BASED COMPENSATION AND 

EMPLOYEE BENEFIT PLANS

Share-based Compensation Plans
In 1993, we adopted a share option plan for our Trustees under 
which  we  have  75,000  common  shares  reserved  for  issuance. 
These  options  expire  ten  years  after  the  date  of  grant  and  are  
all exercisable. Shares for this plan are issued under a registra-
tion  statement  on  Form  S-8  that  became  effective  upon  filing 
with the Securities and Exchange Commission. As of December 
31, 2006, there were no awards available for future grant under 
this plan.

In March 1998, we adopted a long-term incentive plan for our 
Trustees  and  employees.  This  plan  provides  for  the  award  of 
options  to  acquire  our  common  shares  (“share  options”),  
common  shares  subject  to  forfeiture  restrictions  (“restricted 
shares”)  and  dividend  equivalents.  We  are  authorized  to  issue 
awards  under  the  plan  amounting  to  no  more  than  13%  of  
the  total  of  (1)  our  common  shares  outstanding  plus  (2)  the 
number of shares that would be outstanding upon redemption  

8080

of  all  units  of  the  Operating  Partnership  or  other  securities  
that  are  convertible  into  our  common  shares.  Trustee  options 
under  this  plan  become  exercisable  beginning  on  the  first  
anniversary  of  their  grant.  The  vesting  periods  for  employees’ 
options  under  this  plan  range  from  immediately  to  five  years, 
although  they  generally  are  three  years.  Options  expire  ten 
years  after  the  date  of  grant.  Restricted  shares  generally  vest 
annually  in  the  following  increments:  16%  upon  the  first  

anniversary following the date of grant, 18% upon the second 
anniversary,  20%  upon  the  third  anniversary,  22%  upon  the 
fourth anniversary and 24% upon the fifth anniversary. Shares 
for  this  plan  are  issued  under  a  registration  statement  on  
Form S-8 that became effective upon filing with the Securities 
and  Exchange  Commission.  As  of  December  31,  2006,  we  had 
711,844 awards available for future grant under this plan.

The following table summarizes share option transactions under the plans described above:

Range of 
Exercise Price 
per Share

Weighted Average 
Exercise Price  
per Share

Weighted Average 
Remaining  
Contractual Term  
(in Years)

Aggregate 
Intrinsic 
Value

Outstanding at December 31, 2003
Granted—2004
Forfeited/Expired—2004
Exercised—2004

Outstanding at December 31, 2004
Granted—2005
Forfeited/Expired—2005
Exercised—2005

Shares

3,202,026
290,450
(20,994)
(784,398)

2,687,084
521,588
(87,665)
(411,080)

$5.25–$14.30
$15.93–$28.69
$8.63–$25.05
$5.63–$17.25

$5.38–$28.69
$25.52–$36.08
$10.00–$34.89
$5.38–$25.05

Outstanding at December 31, 2005

2,709,927

$5.63–$36.08

Granted—2006
Forfeited/Expired—2006
Exercised—2006

503,800
(68,107)
(589,101)

$36.24–$50.59
$13.60–$47.79
$5.63–$34.76

Outstanding at December 31, 2006

2,556,519

$7.38–$50.59

Exercisable at December 31, 2004

Exercisable at December 31, 2005

Exercisable at December 31, 2006

1,617,080

2,054,919

1,753,428

(1)

(2)

(3)

Options expected to vest

762,936

$20.34–$50.59

$10.03
$22.30
$17.81
$  9.57

$11.43
$28.38
$23.60
$10.70

$14.41

$42.84
$33.43
$11.49

$20.18

$10.26

$10.58

$12.65

$36.61

6

4

9

$77,447

$66,318

$10,573

(1)   312,650 of these options had an exercise price ranging from $5.38 to $7.99; 704,238 had an exercise price ranging from $8.00 to $10.99; and 600,192 had an exercise 

price ranging from $11.00 to $18.08.

(2)   486,250 of these options had an exercise price ranging from $5.63 to $7.99; 854,027 had an exercise price ranging from $8.00 to $10.99; 590,104 had an exercise price 

ranging from $11.00 to $16.99; and 124,538 had an exercise price ranging from $17.00 to $28.69.

(3)   234,082 of these options had an exercise price ranging from $7.38 to $7.99, 754,068 had an exercise price ranging from $8.00 to $10.99, 456,732 had an exercise price 

ranging from $11.00 to $16.99, 198,241 had an exercise price ranging from $17.00 to $25.99 and 110,305 had an exercise price range of $26.00 to $36.08.

The total intrinsic value of options exercised was $19,748 in 2006, $8,366 in 2005 and $11,578 in 2004.

We received proceeds from the exercise of share options of $6,767 in 2006, $4,398 in 2005 and $7,510 in 2004.

8181

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

We  computed  share-based  compensation  expense  under  the 
fair  value  method  using  the  Black-Scholes  option-pricing 
model; the weighted average assumptions we used in that model 
are set forth below:

For the Years Ended  
December 31,

2006

2005

2004

$8.99
4.91%(1)
6.82
23.69%(2)
3.82%(3)

$2.18
3.15%
4.21

$2.82
3.97%
6.00
22.70% 22.89%
7.60%
6.90%

Weighted average fair value  
of grants on grant date

Risk-free interest rate
Expected life-years
Expected volatility
Expected dividend yield

(1)   Ranged from 4.38% to 5.30%.

(2)   Ranged from 22.37% to 25.11%.

(3)   Ranged from 3.36% to 4.25%.

A  summary  of  the  weighted  average  grant-date  fair  value  per 
option granted is as follows:

The  following  table  summarizes  restricted  share  transactions 
under the plans described above for 2006:

Unvested at December 31, 2005
Granted
Forfeited
Vested

Unvested at December 31, 2006

Restricted shares expected to vest

Weighted Average 
Grant Date  
Fair Value

$19.88
$42.65
$23.67
$17.16

$29.51

Shares

395,609
163,420
(20,822)
(124,517)

413,690

395,662

The  total  fair  value  of  restricted  shares  that  vested  during  the 
year ended December 31, 2006 was $5,319.

We  realized  a  windfall  tax  benefit  of  $562  in  2006  on  options 
exercised and restricted shares vested by employees of our sub-
sidiaries that are subject to income tax.

The  table  below  sets  forth  information  relating  to  expenses 
from  share-based  compensation  included  in  our  Consolidated 
Statements of Operations for 2006:

For the Years Ended 
December 31,

2006

2005

2004

$8.99

$2.82

$2.18

Increase in general and administrative 

expenses

$ 8.99

$ 2.83

$ 2.15

Increase in construction contract and  
other service operations expenses

N/A

$ 2.51

$ 1.65

Share-based compensation expense
Income taxes
Minority interests

For the Year Ended  
December 31, 2006

$2,659

964

3,623
(107)
(617)

Weighted average grant-date fair value
Weighted average grant-date fair value-
exercise price equals market price on 
grant-date

Weighted average grant-date fair value-

exercise price exceeds market price on 
grant-date

Weighted average grant-date fair value-

exercise price less than market price on 
grant-date

N/A

N/A

$ 2.24

Net share-based compensation expense

$2,899

Net share-based compensation expense  

The weighted average grant-date fair value of option issuances 
increased significantly in 2006 over previous years due in large 
part to a large decrease in the weighted average dividend yield 
assumption  from  2006  to  2005.  We  derive  our  dividend  yield 
assumption  from  the  average  historical  dividend  yield  on  our 
common shares over a period of time ending on the grant-date 
of options. Prior to 2006, we used a longer historical time frame 
for  purposes  of  estimating  our  dividend  yield  assumption.  In 
response  to  the  trading  price  for  our  common  shares  having 
increased significantly in recent years, which has had a decreas-
ing effect on our dividend yield, we concluded that the use of a 
shorter historical time frame for estimating the dividend yield 
assumption was appropriate.

per share
  Basic
  Diluted

$  0.07
$  0.07

We also capitalized share-based compensation costs of approxi-
mately $212 in 2006.

As  of  December  31,  2006,  there  was  $3,769  of  unrecognized 
compensation cost related to nonvested options that is expected 
to  be  recognized  over  a  weighted  average  period  of  approxi-
mately two years. As of December 31, 2006, there was $8,571 of 
unrecognized compensation cost related to unvested restricted 
shares that is expected to be recognized over a weighted average 
period of approximately three years.

8282

 
 
Disclosure for Periods Prior to 2006, Including Pro Forma 
Financial Information Under SFAS 123
Expenses  from  share-based  compensation  ref lected  in  our 
Consolidated  Statements  of  Operations  for  the  year  ended 
December 31, 2005 and 2004 were as follows:

Increase in general and administrative 

expenses

Increase in construction contract and  
other service operations expenses

For the  
Years Ended 
December 31,

2005

2004

$  1,903

$  1,579

230

552

The  following  table  summarizes  our  operating  results  for  the 
years  ended  December  31,  2005  and  2004  as  if  we  elected  to 
account for our share-based compensation under the fair value 
provisions of SFAS 123 in those periods:

For the  
Years Ended 
December 31,

2005

2004

$ 39,031

$ 37,032

1,670

1,824

Net income, as reported
Add: Share-based compensation expense, net 
of related tax effects and minority interests, 
included in the determination of net income

Less: Share-based compensation expense 
determined under the fair value based 
method, net of related tax effects and 
minority interests

2006, $396 in 2005 and $323 in 2004. The 401(k) plan is fully 
funded at December 31, 2006.

Deferred Compensation Plan
We  have  a  non-qualified  elective  deferred  compensation  plan 
for  certain  members  of  our  management  team  that  permits 
participants  to  defer  up  to  100%  of  their  compensation  on  a 
pre-tax  basis  and  receive  a  tax-deferred  return  on  such  defer-
rals.  We  match  the  participant’s  contribution  in  an  amount 
equal to 50% of  the participant’s elective  deferral for the plan 
year up to a maximum of 6% of a participant’s annual compen-
sation  after  deducting  contributions,  if  any,  made  under  our 
401(k)  plan.  Deferred  compensation  related  to  an  employee 
contribution is charged to expense and is fully vested. Deferred 
compensation related to the Company’s matching contribution 
is charged to expense and vests in annual one-third increments. 
Once an employee has been with us for three years, all match-
ing  contributions  are  fully  vested.  The  balance  of  the  plan, 
which  was  fully  funded,  totaled  $5,195  at  December  31,  2006 
and $4,166 at December 31, 2005, and is included in the accom-
panying Consolidated Balance Sheets.

13. RELATED PARTY TRANSACTIONS

We  earned  fees  from  unconsolidated  joint  ventures  totaling 
$619 in 2006, $326 in 2005 and $219 in 2004. These fees were 
for  property  management,  construction  and  leasing  services 
performed.

(1,671)

(1,500)

14. OPERATING LEASES

Net income, pro forma

$ 39,030

$ 37,356

Basic EPS on net income available to  
common shareholders, as reported
Basic EPS on net income available to  
common shareholders, pro forma
Diluted EPS on net income available to  
common shareholders, as reported
Diluted EPS on net income available to  
common shareholders, pro forma

$  0.65

$  0.57

$  0.65

$  0.58

$  0.63

$  0.54

$  0.63

$  0.55

401(k) Plan
We have a 401(k) defined contribution plan covering substan-
tially  all  of  our  employees  that  permits  participants  to  defer  
up to a maximum of 15% of their compensation. We match a 
participant’s  contribution  in  an  amount  equal  to  50%  of  the 
participant’s  elective  deferral  for  the  plan  year  up  to  a  maxi-
mum of 6% of a participant’s annual compensation. Employees’ 
contributions are fully vested and our matching contributions 
vest  in  annual  one-third  increments.  Once  an  employee  has 
been  with  us  for  three  years,  all  matching  contributions  are 
fully vested. We fund all contributions with cash. Our match-
ing contributions under the plan totaled approximately $538 in 

We lease our properties to tenants under operating leases with 
various expiration dates extending to the year 2025. Gross min-
imum  future  rentals  on  noncancelable  leases  in  our  consoli-
dated properties at December 31, 2006 were as follows:

For the Years Ended December 31,

2007
2008
2009
2010
2011
Thereafter

  Total

$  243,062
211,470
193,638
155,790
123,461
445,738

$ 1,373,159

We consider a lease to be noncancelable when a tenant (1) may 
not terminate its lease obligation early or (2) may terminate its 
lease  obligation  early  in  exchange  for  a  fee  or  penalty  that  we 
consider  material  enough  such  that  termination  would  be 
highly unlikely.

8383

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

15. SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS

Interest paid, net of capitalized interest

Income taxes paid

Supplemental schedule of non-cash investing and financing activities:
Consolidation of real estate joint ventures in connection with adoption of FASB Interpretation FIN 46(R), 

“Consolidation of Variable Interest Entities”:
  Operating properties
  Projects under construction or development

Investments in and advances to unconsolidated real estate joint ventures

  Restricted cash
  Accounts receivable, net
  Deferred rent receivable
  Deferred charges, net
  Prepaid and other assets
  Mortgage and other loans payable
  Accounts payable and accrued expenses
  Rents received in advance and security deposits
  Other liabilities
  Minority interests—other consolidated real estate entities

  Net adjustment

Adjustment to purchase of commercial real estate properties by acquiring joint venture interests:
  Operating properties

Investments in and advances to unconsolidated real estate joint ventures

  Net adjustment

Debt assumed in connection with acquisitions

For the Years Ended  
December 31,

2006

2005

2004

$ 68,617

$ 57,100

$  43,717

$ 

54

$  — $  —

$  — $  — $  2,176
17,959
(3,957)
10
145
7
1,026
(3,263)
(10,171)
(2,737)
(347)
4,650
(5,498)

—
—
—
—
—
—
—
—
—
—
—
—

—
—
—
—
—
—
—
—
—
—
—
—

$  — $  — $  —

$  — $  — $ 

—

—

(83)
83

$  — $  — $  —

$ 39,011

$ 17,347

$ 120,817

Property acquired through lease arrangement included in rents received in advance and security deposits

$  1,282

$  — $  —

Proceeds from sales of properties invested in restricted cash account

Increase (decrease) in accrued capital improvements and leasing costs

$ 33,730

$  — $  —

$ 18,181

$ (9,349)

$  17,234

Amortization of discounts and premiums on mortgage loans to commercial real estate properties

$ 

196

$ 

273

$ 

Accretion of other liability to commercial real estate properties

(Decrease) increase in fair value of derivatives applied to AOCL and minority interests

$  — $  — $ 

$  (308)

$  — $ 

925

147

390

Issuance of common units in the Operating Partnership in connection with contribution of properties 

accounted for under the financing method of accounting

$  — $  3,687

$  —

Issuance of common units in the Operating Partnership in connection with acquisition of properties

$  7,497

$  2,647

$  —

Issuance of preferred units in the Operating Partnership in connection with acquisition of properties

$  — $  — $  8,800

Adjustments to minority interests resulting from changes in ownership of Operating Partnership by COPT

$ 16,255

$ 12,888

$  19,360

Dividends/distribution payable

Decrease in minority interests and increase in shareholders’ equity in connection with the conversion of 

common units into common shares

Conversion of preferred shares adjusted to common shares and paid in capital

Issuance of restricted shares

$ 19,164

$ 16,703

$  14,713

$ 11,078

$  9,120

$  8,041

$  — $  — $ 

12

$  — $  3,276

$  2,271

8484

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
16. INFORMATION BY BUSINESS SEGMENT

As  of  December  31,  2006,  we  had  nine  primary  office  property  segments:  Baltimore/Washington  Corridor;  Northern  Virginia; 
Suburban  Baltimore;  Colorado  Springs,  Colorado;  Suburban  Maryland;  Greater  Philadelphia;  St.  Mary’s  and  King  George 
Counties; San Antonio, Texas; and Northern/Central New Jersey. We also had an office property segment in Greater Harrisburg, 
Pennsylvania prior to the contribution of our properties in that region into a real estate joint venture in exchange for cash and a 
20% interest in such joint venture on September 29, 2005.

The table below reports segment financial information. Our segment entitled “Other” includes assets and operations not specifi-
cally associated with the other defined segments, including corporate assets, investments in unconsolidated entities and elimina-
tion  entries  required  in  consolidation.  We  measure  the  performance  of  our  segments  based  on  total  revenues  less  property 
operating  expenses,  a  measure  we  define  as  net  operating  income  (“NOI”).  We  believe  that  NOI  is  an  important  supplemental 
measure of operating performance for a REIT’s operating real estate because it provides a measure of the core operations that is 
unaffected by depreciation, amortization, financing and general and administrative expenses; this measure is particularly useful 
in our opinion in evaluating the performance of geographic segments, same-office property groupings and individual properties.

Baltimore/ 
Washington 
Corridor

Northern 
Virginia

Suburban 
Baltimore

Colorado 
Springs

Suburban 
Maryland

Greater 
Philadelphia

St. Mary’s & 
King George 
Counties

San 
Antonio

Northern/ 
Central  
New Jersey

Greater  

Harrisburg Other

Total

Year Ended  

December 31, 2006

Revenues
Property operating expenses

$  147,648
45,667

$  63,515 $  28,570 $  9,776 $  15,316
5,710

11,889

22,727

3,659

$  10,025
168

$ 12,087
3,116

$  7,441
1,533

$ 12,295
3,311

$        (6)
(49)

$ 

(875) $  305,792
96,033

(1,698)

NOI

$  101,981

$  40,788 $  16,681 $  6,117 $  9,606

$  9,857

$  8,971

$  5,908

$  8,984

$         43

$ 

823 $  209,759

Additions to commercial  
real estate properties

Segment assets at  

$  190,038

$  21,638 $  6,206 $  66,628 $  4,664

$  1,202

$  1,823

$  8,814

$  1,398

$            5

$  37,746 $  340,162

December 31, 2006

$ 1,081,356

$ 473,540 $ 162,786 $ 135,118 $ 117,573

$  97,795

$ 97,661

$ 52,661

$ 48,499

$         — $ 152,612 $ 2,419,601

Year Ended  

December 31, 2005

Revenues
Property operating expenses

$  123,819
37,373

$  60,255 $  11,099 $  1,006 $  12,555
4,791

20,348

4,367

407

$  10,025
157

$ 12,852
2,784

$  1,814
334

$ 13,779
5,737

$  6,605
2,209

$  (1,450) $  252,359
76,240

(2,267)

NOI

$ 

86,446

$  39,907 $  6,732 $ 

599 $  7,764

$  9,868

$ 10,068

$  1,480

$  8,042

$  4,396

$ 

817 $  176,119

Additions to commercial  
real estate properties

Segment assets at  

$  144,334

$  57,972 $ 110,085 $  57,901 $  58,707

$ 

872

$  5,739

$ 42,658

$  2,199

$        449

$ 

419 $  481,335

December 31, 2005

$  901,718

$ 463,179 $ 189,576 $  63,767 $ 130,221

$  99,357

$ 99,191

$ 42,884

$ 67,206

$         — $  72,660 $ 2,129,759

Year Ended  

December 31, 2004

Revenues
Property operating expenses

$  105,945
33,252

$  48,701 $  8,406 $ 

14,323

3,465

— $  8,924
3,372
—

$  10,025
165

$  5,483
1,327

$  — $ 18,793
5,362

—

$  8,855
2,874

$ 

(559) $  214,573
63,053

(1,087)

NOI

$ 

72,693

$  34,378 $  4,941 $ 

— $  5,552

$  9,860

$  4,156

$  — $ 13,431

$  5,981

$ 

528 $  151,520

Additions to commercial  
real estate properties

Segment assets at  

$  111,260

$ 148,400 $  17,781 $ 

— $  26,513

$  1,176

$ 90,214

$  — $  2,063

$       509

$ 

34 $  397,950

December 31, 2004

$  774,541

$ 421,434 $  60,216 $ 

— $  69,213

$ 101,042

$ 96,413

$  — $ 85,110

$68,126

$  55,931 $ 1,732,026

8585

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

The  following  table  reconciles  our  segment  revenues  to  total 
revenues  as  reported  on  our  Consolidated  Statements  of 
Operations:

Segment revenues
Construction contract revenues
Other service operations  

revenues

Less: Revenues from discontin-
ued operations (Note 18)

For the Years Ended December 31,

2006

2005

2004

$ 305,792
52,182

$ 252,359
74,357

$ 214,573
25,018

7,902

4,877

3,885

(4,473)

(10,286)

(10,629)

Total revenues

$ 361,403

$ 321,307

$ 232,847

The following table reconciles our segment property operating 
expenses to property operating expenses as reported on our 
Consolidated Statements of Operations:

Segment property operating 

expenses

Less: Property expenses from 
discontinued real estate  
operations (Note 18)

Total property operating 

expenses

For the Years Ended December 31,

2006

2005

2004

$  96,033

$  76,240

$  63,053

(1,529)

(3,987)

(4,071)

$  94,504

$  72,253

$  58,982

The following table reconciles our NOI for reportable segments 
to  income  from  continuing  operations  as  reported  on  our 
Consolidated Statements of Operations:

The accounting policies of the segments are the same as those 
previously disclosed for Corporate Office Properties Trust and 
subsidiaries,  where  applicable.  We  did  not  allocate  interest 
expense,  amortization  of  deferred  financing  costs  and  depre-
ciation  and  other  amortization  to  segments  since  they  are  not 
included  in  the  measure  of  segment  profit  reviewed  by  man-
agement.  We  also  did  not  allocate  construction  contract  reve-
nues,  other  service  operations  revenues,  construction  contract 
expenses,  other  service  operations  expenses,  equity  in  loss  of 
unconsolidated  entities,  general  and  administrative  expenses, 
income taxes and minority interests because these items repre-
sent general corporate items not attributable to segments.

17. INCOME TAXES

Corporate  Office  Properties  Trust  elected  to  be  treated  as  a 
REIT under Sections 856 through 860 of the Internal Revenue 
Code. To qualify as a REIT, we must meet a number of organi-
zational and operational requirements, including a requirement 
that we distribute at least 90% of our adjusted taxable income 
to our shareholders. As a REIT, we generally will not be subject 
to  Federal  income  tax  if  we  distribute  at  least  100%  of  our  
taxable  income  to  our  shareholders  and  satisfy  certain  other 
requirements  (see  discussion  below).  If  we  fail  to  qualify  as  a 
REIT in any tax year, we will be subject to Federal income tax 
on our taxable income at regular corporate rates and may not 
be able to qualify as a REIT for four subsequent tax years.

For the Years Ended December 31,

2006

2005

2004

$ 209,759
52,182

$ 176,119
74,357

$ 151,520
25,018

The  differences  between  taxable  income  reported  on  our 
income tax return (estimated 2006 and actual 2005 and 2004) 
and net income as reported on our Consolidated Statements of 
Operations are set forth below (unaudited):

7,902

4,877

3,885

(92)
(887)

(88)
(668)

(88)
(795)

(78,712)

(61,049)

(49,289)

(49,961)

(72,534)

(23,733)

(7,384)

(4,753)

(3,263)

Net income
Adjustments:
  Rental revenue recognition
 Compensation expense  

recognition

  Operating expense recognition
  Gain on sales of properties

(16,936)

(13,534)

(10,938)

Interest income

(71,378)

(54,872)

(42,148)

(2,847)

(2,229)

(2,420)

(4,584)

(5,245)

(5,473)

(2,944)

(6,299)

(6,558)

  Losses from service operations

Income tax expense

  Depreciation and amortization
 Earnings from unconsolidated 
real estate joint ventures

  Minority interests, gross
  Other

For the Years Ended December 31,

2006

2005

2004

(Estimated)
$    49,227

$ 39,031

$ 37,032

(8,144)

(7,225)

(6,400)

(17,163)
(169)
(11,045)
—
(2,321)
887
29,680

373
2,586
(191)

(5,068)
(68)
7,174
—
(1,780)
699
18,668

307
(4,828)
(737)

(9,633)
(57)
150
84
(1,971)
795
11,588

41
1,202
7

$  34,118

$  34,082

$  35,718

Taxable income

$    43,720

$ 46,173

$ 32,838

NOI for reportable segments
Construction contract revenues
Other service operations  

revenues

Equity in loss of unconsolidated 

entities

Income tax expense
Less:

 Depreciation and other 

amortization associated 
with real estate operations

 Construction contract 

expenses

 Other service operations 

expenses

 General and administrative 

expenses

 Interest expense on continu-

ing operations

 Amortization of deferred 

financing costs

 Minority interests in con-

tinuing operations
 NOI from discontinued  

operations

Income from continuing  

operations

8686

 
 
 
 
 
 
 
 
 
 
 
 
For Federal income tax purposes, dividends to shareholders may be characterized as ordinary income, capital gains or return of 
capital. The characterization of dividends declared on our common and preferred shares during each of the last three years was  
as follows:

Ordinary income
Long-term capital gain
Return of capital

We  distributed  all  of  our  REIT  taxable  income  in  2006,  2005 
and 2004 and, as a result, did not incur Federal income tax in 
those years on such income.

COMI is subject to Federal and state income taxes. COMI had 
income  before  income  taxes  under  GAAP  of  $2,288  in  2006, 
$1,780 in 2005 and $1,971 in 2004. COMI’s provision for income 
tax consisted of the following:

Deferred
  Federal
  State

Current
  Federal
  State

Total

For the Years Ended 
December 31,

2006

2005

2004

$ 641
141

$ 572
127

$ 654
141

782

699

795

86
19

105

—
—

—

—
—

—

$ 887

$ 699

$ 795

A reconciliation of COMI’s Federal statutory rate  to the  effec-
tive  tax  rate  for  income  tax  reported  on  our  Statements  of 
Operations is set forth below:

For the Years Ended 
December 31,

2006

2005

2004

34.0% 34.0% 35.0%

4.6%
0.2%

4.7%
0.6%

4.6%
0.7%

Income taxes at U.S. statutory rate
State and local, net of U.S. Federal tax 

benefit

Other

Effective tax rate

Common Shares

Preferred Shares

For the Years Ended 
December 31,

For the Years Ended 
December 31,

2006

2005

2004

2006

2005

2004

50.3% 70.7% 67.4%
0.0%
7.2% 17.8%
42.5% 11.5% 32.6%

87.4% 79.9% 100.0%
0.0%
12.6% 20.1%
0.0%
0.0%
0.0%

Items  contributing  to  temporary  differences  that  lead  to 
deferred taxes include net operating losses that are not deduct-
ible until future periods, depreciation and amortization, share-
based  compensation,  certain  accrued  compensation  and 
compensation  paid  in  the  form  of  contributions  to  a  deferred 
nonqualified compensation plan.

We are subject to certain state and local income and franchise 
taxes. The expense associated with these state and local taxes is 
included  in  general  and  administrative  expenses  on  our 
Consolidated Statements of Operations. We did not separately 
state  these  amounts  on  our  Consolidated  Statements  of 
Operations because they are insignificant.

18. DISCONTINUED OPERATIONS

Income  from  discontinued  operations  includes  revenues  and 
expenses associated with the following:

•   three  properties  located  in  the  Northern/Central  New 

Jersey region that were sold on September 8, 2005;

•   the two Lakeview at the Greens properties that were sold 

on February 6, 2006;

•   the  68  Culver  Road  property  that  was  sold  on  March  8, 

2006;

•   the 710 Route 46 property that was sold on July 26, 2006;

•   the 230 Schilling Circle property that was sold on August 

9, 2006;

•   the  7  Centre  Drive  property  that  was  sold  on  August  30, 

2006; and

•   the  Brown’s  Wharf  property  that  was  sold  on  September 

38.8% 39.3% 40.3%

28, 2006.

8787

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

The table below sets forth the components of income from dis-
continued operations:

•   a  parcel  of  land  in  Aberdeen,  Maryland  for  $10,000,  of 

which we paid a deposit of $100 in 2006; and

For the Years Ended  
December 31,

2006

2005

2004

Revenue from real estate operations

$  4,473

$ 10,286

$ 10,629

Expenses from real estate  

operations:

  Property operating expenses
  Depreciation and amortization

Interest expense

  Other

 Expenses from real estate 

1,529
1,362
1,042
135

3,987
2,506
2,272
11

4,071
2,615
2,115
11

operations

4,068

8,776

8,812

Income from discontinued opera-
tions before gain on sales of real 
estate and minority interests

Gain on sales of real estate
Minority interests in discontinued 

405
17,031

1,510
4,324

1,817
—

operations

(3,059)

(1,153)

(390)

Income from discontinued opera-
tions, net of minority interests

$ 14,377

$  4,681

$  1,427

19. COMMITMENTS AND CONTINGENCIES

In  the  normal  course  of  business,  we  are  involved  in  legal 
actions  arising  from  our  ownership  and  administration  of 
properties. Management does not anticipate that any liabilities 
that  may  result  will  have  a  materially  adverse  effect  on  our 
financial  position,  operations  or  liquidity.  We  are  subject  to 
various  Federal,  state  and  local  environmental  regulations 
related to our property ownership and operation. We have per-
formed environmental assessments of our properties, the results 
of which have not revealed any environmental liability that we 
believe would have a materially adverse effect on our financial 
position, operations or liquidity.

Acquisitions
As of December 31, 2006, we were under contract to acquire the 
following properties:

•   the Nottingham Acquisition, as described in Note 22, for 
$362,500,  of  which  we  paid  a  deposit  of  $2,000  in  2006. 
We  completed  this  acquisition  in  January  2007,  as  dis-
cussed in Note 22;

•   the  remaining  91  acres  of  land  not  yet  acquired  as  part  
of  the  acquisition  of  property  in  Washington  County, 
Maryland discussed in Note 4; we expect to make the fol-
lowing additional future cash payments to the seller for (1) 
the acquisition of the remaining 91 acres and (2) portions 
of the contract price on which payment was deferred per 
the  contract:  $1,310  in  2007,  $1,000  in  2008  and  $155  in 
2009. We could incur an additional cash obligation to the 
seller  after  that  of  up  to  $4,000;  this  $4,000  cash  obliga-
tion is subject to reduction by an amount ranging between 
$750 and $4,000, with the amount of such reduction to be 
determined  based  on  defined  levels  of  (1)  job  creation 
resulting from the future development of the property and 
(2) future real estate taxes generated by the property. Upon 
completion  of  this  acquisition,  we  will  be  obligated  to 
incur  $7,500  in  development  and  construction  costs  for 
the property.

Joint Ventures
As part of our obligations under the partnership agreement of 
Harrisburg Corporate Gateway Partners, LP, we may be required 
to make unilateral payments to fund rent shortfalls on behalf of 
a tenant that was in bankruptcy at the time the partnership was 
formed. Our total unilateral commitment under this guaranty 
is  approximately  $306;  the  tenant’s  account  was  current  as  of 
December 31, 2006. We also agreed to indemnify the partner-
ship’s lender for 80% of losses under standard nonrecourse loan 
guarantees  (environmental  indemnifications  and  guarantees 
against fraud and misrepresentation) during the period of time 
in  which  we  manage  the  partnership’s  properties;  we  do  not 
expect to incur any losses under these loan guarantees.

We  are  party  to  a  contribution  agreement  that  formed  a  joint 
venture relationship with a limited partnership to develop up to 
1.8 million square feet of office space on 63 acres of land located 
in  Hanover,  Maryland.  Under  the  contribution  agreement,  we 
agreed  to  fund  up  to  $2,200  in  pre-construction  costs  associ-
ated  with  the  property.  As  we  and  the  joint  venture  partner 
agree  to  proceed  with  the  construction  of  buildings  in  the 
future,  we  would  make  additional  cash  capital  contributions 
into newly-formed entities and our joint venture partner would 
contribute land into such entities. We will have a 50% interest 
in this joint venture relationship.

8888

 
 
 
We may need to make our pro rata share of additional invest-
ments in our real estate joint ventures (generally based on our 
percentage  ownership)  in  the  event  that  additional  funds  are 
needed.  In  the  event  that  the  other  members  of  these  joint  
ventures do not pay their share of investments when additional 
funds are needed, we may then need to make even larger invest-
ments in these joint ventures.

In  two  of  the  consolidated  joint  ventures  that  we  owned  as  of 
December 31, 2006, we would be obligated to acquire the other 
members’ 50% interests in the joint ventures if defined events 
were  to  occur.  The  amounts  we  would  need  to  pay  for  those 
membership interests are computed based on the amounts that 
the  owners  of  the  interests  would  receive  under  the  joint  ven-
ture agreements in the event that office properties owned by the 
joint ventures were sold for a capitalized fair value (as defined 
in the agreements) on a defined date. We estimate the aggregate 
amount we would need to pay for the other members’ member-
ship  interests  in  these  joint  ventures  to  be  $2,383;  however, 
since  the  determination  of  this  amount  is  dependent  on  the 
operations  of  the  office  properties,  which  are  not  both  com-
pleted  and  sufficiently  occupied,  this  estimate  is  preliminary 
and could be materially different from the actual obligation.

Ground Lease
On April 4, 2006, we entered into a 62-year ground lease agree-
ment on a six-acre land parcel on which we expect to construct 
a 110,000 square foot property. We paid $550 to the lessor upon 
lease execution and expect to pay an additional $1,870 in rent 
under the lease in 2007. No other rental payments are required 
over  the  life  of  the  lease,  although  we  are  responsible  for 
expenses  associated  with  the  property.  We  will  recognize  the 
total  lease  payments  incurred  under  the  lease  evenly  over  the 
term of the lease.

Office Space Operating Leases
We are obligated as lessee under four operating leases for office 
space.  Future  minimum  rental  payments  due  under  the  terms 
of these leases as of December 31, 2006 follow:

2007
2008
2009
2010
2011

$ 270
261
175
135
57

$ 898

Other Operating Leases
We  are  obligated  under  various  leases  for  vehicles  and  office 
equipment.  Future  minimum  rental  payments  due  under  the 
terms of these leases as of December 31, 2006 follow:

2007
2008
2009
2010
2011

$  475
383
209
67
9

$ 1,143

Environmental Indemnity Agreement
We  agreed  to  provide  certain  environmental  indemnifications 
in connection with a lease of three properties in our Northern/
Central New Jersey region. The prior owner of the properties, a 
Fortune  100  company  which  is  responsible  for  groundwater 
contamination at such properties, previously agreed to indem-
nify  us  for  (1)  direct  losses  incurred  in  connection  with  the 
contamination and (2) its failure to perform remediation activ-
ities required by the State of New Jersey, up to the point that the 
state declares the remediation to be complete. Under the lease 
agreement, we agreed to the following:

•   to  indemnify  the  tenant  against  losses  covered  under  the 
prior owner’s indemnity agreement if the prior owner fails 
to indemnify the tenant for such losses. This indemnifica-
tion  is  capped  at  $5,000  in  perpetuity  after  the  State  of 
New Jersey declares the remediation to be complete;

•   to  indemnify  the  tenant  for  consequential  damages  (e.g., 
business interruption) at one of the buildings in perpetu-
ity and another of the buildings for 15 years after the ten-
ant’s acquisition of the property from us, if such acquisition 
occurs. This indemnification is capped at $12,500; and

•   to pay 50% of additional costs related to construction and 
environmental regulatory activities incurred by the tenant 
as a result of the indemnified environmental condition of 
the  properties.  This  indemnification  is  capped  at  $300 
annually and $1,500 in the aggregate.

8989

notes to consolidated financial statements corporate office properties trust and subsidiaries

(Dollars in thousands, except per share data)

20. QUARTERLY DATA (UNAUDITED)

The tables below set forth selected quarterly information for the years ended December 31, 2006 and 2005. Certain of the amounts 
below have been reclassified to conform to our current presentation of discontinued operations, which is discussed in Note 18.

Revenues

Operating income

Income from continuing operations

For the Year Ended December 31, 2006

First 
Quarter

Second 
Quarter

Third 
Quarter

Fourth 
Quarter

$ 86,476

$ 85,689

$ 92,927

$ 96,311

$ 26,693

$ 28,419

$ 27,631

$ 31,163

$  7,652

$  8,999

$  7,799

$  9,668

Income (loss) from discontinued operations, net of minority interests

$  2,175

$ 

92

$ 12,191

$        (81)

Net income
Preferred share dividends
Issuance costs associated with redeemed preferred shares

Net income available to common shareholders

Basic earnings per share:

Income from continuing operations

  Net income available to common shareholders

Diluted earnings per share:

Income from continuing operations

  Net income available to common shareholders

Revenues

Operating income

Income from continuing operations

$  9,937
(3,654)
—

$  9,116
(3,653)
—

$ 20,587
(4,307)
(1,829)

$  9,587
(3,790)
(2,067)

$  6,283

$  5,463

$ 14,451

$  3,730

$  0.10

$  0.13

$  0.05

$  0.09

$  0.16

$  0.13

$  0.34

$  0.09

$  0.10

$  0.13

$  0.05

$  0.09

$  0.15

$  0.13

$  0.33

$  0.08

For the Year Ended December 31, 2005

First 
Quarter

Second 
Quarter

Third 
Quarter

Fourth 
Quarter

$ 74,887

$ 76,791

$ 90,792

$ 78,837

$ 23,816

$ 23,965

$ 22,354

$ 27,049

$  8,798

$  8,631

$  6,660

$  9,993

Income from discontinued operations, net of minority interests

$ 

223

$ 

320

$  3,870

$ 

268

Net income
Preferred share dividends

Net income available to common shareholders

Basic earnings per share:

Income from continuing operations

  Net income available to common shareholders

Diluted earnings per share:

Income from continuing operations

  Net income available to common shareholders

$  9,040
(3,654)

$  9,120
(3,654)

$ 10,589
(3,653)

$ 10,282
(3,654)

$  5,386

$  5,466

$  6,936

$  6,628

$  0.14

$  0.14

$  0.08

$  0.16

$  0.15

$  0.15

$  0.19

$  0.17

$  0.14

$  0.13

$  0.08

$  0.16

$  0.14

$  0.14

$  0.18

$  0.16

9090

 
 
 
 
21. PRO FORMA FINANCIAL INFORMATION 
(UNAUDITED)

We accounted for our acquisitions using the purchase method 
of  accounting.  We  included  the  results  of  operations  for  
our  acquisitions  in  our  Consolidated  Statements  of  Opera-
tions  from  their  respective  purchase  dates  through  December 
31, 2006.

We  prepared  our  pro  forma  condensed  consolidated  financial 
information  presented  below  as  if  our  2005  acquisition  of  the 
Hunt Valley/Rutherford portfolios and all of our 2004 acquisi-
tions and dispositions of operating properties had occurred at 
the beginning of the respective periods. The pro forma finan-
cial  information  is  unaudited  and  is  not  necessarily  indicative 
of the results that actually would have occurred if these acquisi-
tions  and  dispositions  had  occurred  at  the  beginning  of  the 
respective periods, nor does it purport to indicate our results of 
operations for future periods.

Pro forma total revenues

Pro forma net income

For the Years Ended 
December 31,

2005

2004

$ 347,417

$ 274,893

$  38,233

$  36,484

Pro forma net income available to common 

shareholders

$  23,618

$  18,342

Pro forma earnings per common share on net 
income available to common shareholders
  Basic

  Diluted

$ 

$ 

0.63

0.61

$ 

$ 

0.55

0.52

22. SUBSEQUENT EVENTS

On January 9 and 10, 2007, we completed a series of transactions 
that resulted in the acquisition of 56 operating properties total-
ing 2.4 million square feet and land parcels totaling 187 acres. 
We  refer  to  this  transaction  as  the  Nottingham  Acquisition.  

All  of  the  acquired  properties  are  located  in  Maryland,  with  
36 of the operating properties, totaling 1.6 million square feet,  
and  land  parcels  totaling  175  acres,  located  in  White  Marsh, 
Maryland  and  the  remaining  properties  and  land  parcels 
located  in  other  regions  in  Northern  Baltimore  County  and  
the  Baltimore/Washington  Corridor.  We  believe  that  the  
land parcels totaling 187 acres can support at least 2.0 million 
developable  square  feet.  We  completed  the  Nottingham 
Acquisition for an aggregate cost of approximately $363.9 mil-
lion, including approximately $1.4 million in transaction costs. 
We  financed  the  acquisition  by  (1)  issuing  $26.6  million  in 
Series K Cumulative Redeemable Convertible Preferred Shares 
of  beneficial  interest  (the  “Series  K  Preferred  Shares”)  to  the 
seller;  (2)  issuing  $154.9  million  in  common  shares  to  the  
seller, at a deemed value of $49 per share; (3) assuming existing 
mortgage loans totaling $38.0 million, with an average interest 
rate of approximately 6.0%; (4) assuming an existing mortgage 
loan  totaling  $10.3  million,  which  we  repaid  on  January  11, 
2007  using  borrowings  under  our  Revolving  Credit  Facility;  
(5) assuming an existing unsecured loan totaling $89.1 million, 
with  a  variable  interest  rate  of  LIBOR  plus  1.15%  to  1.55% 
depending  on  our  leverage  levels  at  different  points  in  time;  
(6)  using  $20.1  million  from  an  escrow  funded  by  proceeds 
from one of our property sales; and (7) using borrowings under 
the Revolving Credit Facility for the balance.

The Series K Preferred Shares issued in the Nottingham Acqui-
sition are valued at, and carry a liquidation preference equal to, 
$50  per  share.  The  Series  K  Preferred  Shares  are  nonvoting, 
redeemable for cash at $50 per share at our option on or after 
January  9,  2017,  and  are  convertible,  subject  to  certain  condi-
tions,  into  common  shares  on  the  basis  of  0.8163  common 
shares for each preferred share, in accordance with the terms of 
the  Articles  Supplementary  describing  the  Series  K  Preferred 
Shares. Holders of the Series K Preferred Shares are entitled to 
cumulative dividends, payable quarterly (as and if declared by 
our Board of Trustees). Dividends will accrue from the date of 
issue  at  the  annual  rate  of  $2.80  per  share,  which  is  equal  to 
5.6% of the $50 per share liquidation preference.

9191

 
 
 
market for registrant’s common equity,  

related shareholder matters and issuer repurchases of equity securities

Our  common  shares  trade  on  the  New  York  Stock  Exchange 
(“NYSE”) under the symbol “OFC.” The table below shows the 
range of the high and low sale prices for our common shares as 
reported on the NYSE, as well as the quarterly common share 
dividends per share declared.

The number of holders of record of our common shares was 355 
as of December 31, 2006. This number does not include share-
holders whose shares are held of record by a brokerage house or 
clearing agency, but does include any such brokerage house or 
clearing agency as one record holder.

2005

First Quarter
Second Quarter
Third Quarter
Fourth Quarter

2006

First Quarter
Second Quarter
Third Quarter
Fourth Quarter

Price Range

Low

High

Dividends 
per Share

$25.14
$25.39
$29.27
$32.50

$29.30
$29.78
$35.68
$37.15

$0.255
$0.255
$0.280
$0.280

Price Range

Low

High

Dividends
per Share

$34.91
$37.32
$40.65
$44.21

$46.12
$45.74
$47.54
$51.45

$0.280
$0.280
$0.310
$0.310

We will pay future dividends at the discretion of our Board of 
Trustees. Our ability to pay cash dividends in the future will be 
dependent  upon  (i)  the  income  and  cash  flow  generated  from 
our operations; (ii) cash generated or used by our financing and 
investing  activities;  and  (iii)  the  annual  distribution  require-
ments under the REIT provisions of the Code described above 
and such other factors as the Board of Trustees deems relevant. 
Our ability to make cash dividends will also be limited by the 
terms of our Operating Partnership Agreement and our financ-
ing  arrangements  as  well  as  limitations  imposed  by  state  law 
and the agreements governing any future indebtedness.

common shares performance graph

The graph and the table set forth below assume $100 was invested on December 31, 2001 in the common shares of Corporate Office 
Properties Trust. The graph and the table compare the cumulative return (assuming reinvestment of dividends) of this investment 
with a $100 investment at that time in the S&P 500 Index or the Equity Index of the National Association of Real Estate Investment 
Trusts (“NAREIT”).

COPT

COPT 

S&P

S&P 

NAREIT

NAREIT 

TOTAL RETURN PERFORMANCE
TOTAL RETURN PERFORMANCE 

550

550 

440

440 

330

330 

220 

220

110 

110

0 

0

550

550 

440

440 

330 

330

220 

220

110 

110

0 

0

550

550 

440 

440

330 

330

220 

220

110 

110

0 

0

550 
550

440 
440

e
u
s
l
r
a
a
V
l
l
x
o
D
e
d
n
I

330 
330

220 
220

110 
110

0 
0

CORPORATE OFFICE 
CORPORATE OFFICE
PROPERTIES TRUST 
PROPERTIES TRUST

Source: SNL Financial LC, Charlottesville, VA © 2007  
Source: SNL Financial LC, Charlottesville, VA ©2007 
for Corporate Office Properties Trust  
for Corporate Office Properties Trust 
& NAREIT All Equity REIT Index data 
& NAREIT All Equity REIT Index data

Source: Standard & Poor’s for S&P 500 data 
Source: Standard & Poor’s for S&P 500 data

NAREIT ALL EQUITY  
NAREIT ALL EQUITY 
REIT INDEX 
REIT INDEX

S&P 500 
S&P 500

12/31/01 
12/31/01

12/31/02  12/31/03  12/31/04 
12/31/02 12/31/03 12/31/04

12/31/05  12/31/06 
12/31/05 12/31/06

Index

12/31/01

12/31/02

12/31/03

12/31/04

12/31/05

12/31/06

Corporate Office Properties Trust
S&P 500
NAREIT All Equity REIT Index

$100.00
100.00
100.00

$125.79
77.90
103.82

$198.28
100.24
142.37

$287.84
111.14
187.33

$360.82
116.59
210.12

$525.99
135.00
283.78

Value at

92

 
 
 
 
 
 
Our

values

corporate information

Executive Officers
Randall M. Griffin
President and Chief Executive Officer

Karen M. Singer 
Senior Vice President, General Counsel and 
Secretary

Stephen E. Riffee 
Executive Vice President and Chief Financial 
Officer

Roger A. Waesche, Jr. 
Executive Vice President and Chief Operating 
Officer

Service Company Executive Officer
Dwight S. Taylor 
President, COPT Development & Construction 
Services, LLC

Executive Offices
Corporate Office Properties Trust
6711 Columbia Gateway Drive, Suite 300
Columbia, Maryland 21046
Telephone: (443) 285-5400
Facsimile: (443) 285-7650

&vision

Registrar and Transfer Agent
Shareholders with questions concerning stock 
certificates, account information, dividend 
payments or stock transfers should contact our 
transfer agent:
Wells Fargo Bank, N.A.
Shareholder Services
161 North Concord Exchange
South St. Paul, Minnesota 55075
Toll-free: (800) 468-9716
www.wellsfargo.com/shareownerservices

Pennsylvania Office
Corporate Office Properties Trust
40 Morris Avenue, Suite 220
Bryn Mawr, Pennsylvania 19010

board of trustees

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Legal Counsel
Morgan, Lewis & Bockius
1701 Market Street
Philadelphia, Pennsylvania 19103

Independent Auditors
PricewaterhouseCoopers LLP
250 West Pratt Street, Suite 2100
Baltimore, Maryland 21201

Dividend Reinvestment Plan
Registered shareholders may reinvest dividends 
through the Company’s dividend reinvestment 
plan. For more information, please contact 
Wells Fargo Shareholder Services at  
(800) 468-9716.

Annual Meeting
The annual meeting of the shareholders will be 
held at 9:30 a.m. on Thursday, May 17, 2007, at 
the corporate headquarters of Corporate Office 
Properties Trust at 6711 Columbia Gateway 
Drive, Suite 300, Columbia, Maryland 21046.

Investor Relations
For help with questions about the Company,  
or for additional corporate information, please 
contact:
Mary Ellen Fowler
Vice President and Treasurer
Corporate Office Properties Trust
6711 Columbia Gateway Drive, Suite 300
Columbia, Maryland 21046
Telephone: (443) 285-5450
Facsimile: (443) 285-7640
Email: ir@copt.com

Shareholder Information
As of March 15, 2007, the Company had 
46,743,001 outstanding common shares owned by 
approximately 421 shareholders of record. This 
does not include the number of persons whose 
shares are held in nominee or “street name” 
accounts through brokers or clearing agencies.

Common and Preferred Shares
The common and preferred shares of Corporate 
Office Properties Trust are traded on the New 
York Stock Exchange. Common shares are 
traded under the symbol OFC, and preferred 
shares are traded under the symbols OFCPrG, 
OFCPrH and OFCPrJ.

Website
For additional information on the Company, 
visit our website at www.copt.com.

Forward-looking Information
This report contains forward-looking informa-
tion based upon the Company’s current best 
judgment and expectations. Actual results 
could vary from those presented herein. The 
risks and uncertainties associated with the 
forward-looking information include the 
strength of the commercial office real estate 
market in which the Company operates, com-
petitive market conditions, general economic 
growth, interest rates and capital market condi-
tions. For further information, please refer to 
the Company’s filings with the Securities and 
Exchange Commission.

Corporate Governance Certification
The Company submitted to the New York Stock 
Exchange in 2006 the Annual CEO Certification 
required by Section 303A.12 of the New York 
Stock Exchange corporate governance rules.

Sarbanes-Oxley Act Section 302 Certification
The Company filed with the Securities and 
Exchange Commission, as an exhibit to its 
Form 10-K for the year ended December 31, 
2006, the Sarbanes-Oxley Act Section 302  
certification regarding the quality of the 
Company’s public disclosure.

(left to right)
Jay H. Shidler, Chairman of the Board; Managing Partner, The Shidler Group
Steven D. Kesler, Chief Financial Officer, Chesapeake Commercial Properties, Inc.
Kenneth D. Wethe, Principal, Wethe & Associates
Randall M. Griffin, President and Chief Executive Officer, Corporate Office  
Properties Trust

(left to right)
Clay W. Hamlin, III, Vice Chairman of the Board
Kenneth S. Sweet, Jr., Managing Partner, Gordon Stuart Associates
Thomas F. Brady, Executive Vice President, Corporate Strategy and Retail 
Competitive Supply, Constellation Energy Group
Robert L. Denton, Managing Partner, The Shidler Group

 
 
 
 
 
 
 
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Defining The COPT Way

Corporate Office Properties Trust   2006 Annual Report

6711 Columbia Gateway Drive, Columbia, Maryland 21046   443-285-5400   w w w.copt.com   NYSE : OFC