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CoStar Group

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FY2005 Annual Report · CoStar Group
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2005

ANNUAL
REPORT

Financial
Highlights

In thousands, except per share data

2003

2004

2005

Revenue.   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .  

$ 95,105

$ 112,085 

$ 134,338 

Net income .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .  

Net Income per share-diluted .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .  

$

$

100 

0.01 

$

$

24,985 

1.33 

$

$

6,457

0.34

Weighted average outstanding shares diluted .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .  

16,674 

18,827 

19,007

Cash, cash equivalents, cash held for acquisition and short-term investments .   .  

$ 97,449

$ 117,069 

$ 134,185 

Total assets .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .  

$ 183,900

$ 232,691 

$ 248,059

Stockholders’ equity .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .  

$ 168,369

$ 210,944 

$ 224,796

Five Year
Revenue Growth
($’s in millions)

Comparison of Quarterly EBITDA 
and Net income
($’s in millions)

160

140

120

100

80

60

40

20

-

EBITDA

Net Income

21

20

19

7

6

5

4

3

2

1

-

2001

2002

2003

2004

2005

Q1 2004

Q2 2004

Q3 2004

Q4 2004*

Q1 2005

Q2 2005

Q3 2005

Q4 2005

EBITDA is our GAAP-basis net income  before interest, taxes, depreciation and amortization. 

See page 12A for reconciliation of Quarterly EBITDA with 2004-2005 Quarterly Net Income.

* Fourth Quarter 2004 Net Income includes a one-time income tax credit of approximately $16.7 million.

To Our
Shareholders

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Next year, CoStar will celebrate its 20th anniversary. It’s hard for me to believe, and yet the com-
pany has grown and matured so much that it barely resembles our humble roots.

We’ve achieved so many significant milestones — from the early days of adding photos to our
fledgling commercial real estate database and expanding into new cities from our home base
of Washington, DC  to becoming a publicly traded company  and acquiring COMPS. In recent
years, we moved our products and services to a web-based platform and established a pres-
ence in the United Kingdom by acquiring FOCUS. 

And last year, we accomplished two goals that 19 years ago I would have considered hard to
imagine. With the completion of our 21-market expansion, we now serve 66 U.S. markets and
research over 32.5 billion square feet of commercial space. And in conjunction with that expan-
sion, we are adding a huge new market segment — retail — to our research process in prepa-
ration of unveiling a retail offering later this year.

All of these milestones represent investments we’ve made in the company over the years and
value we’ve created for our customers and shareholders. I’d like to tell you more about our
recent investments and share with you the investments we plan to make this year as we con-
tinue on a path of growth.  

FINANCIAL ACCOMPLISHMENTS

2005 was a strong year for CoStar Group, Inc.  Our EBITDA — or Earnings Before Interest, Taxes,
Depreciation and Amortization — increased significantly over the course of the year, up 66 per-
cent from $4.2 million in the first quarter of 2005 to $7.0 million in the fourth quarter of 2005*.
In my last shareholder letter, I reported that revenues had broken the $100 million mark. I’m
very pleased to tell you that, in 2005, our revenues increased 20 percent year-over-year to
$134.3 million. 

While the majority of our revenue growth and revenues are still coming from our original core
markets, our 21-market expansion is now complete. In aggregate, the markets that have been
open for six months or more are profitable, and we expect that all of our expansion markets, in
aggregate, will be profitable this year.

We closed the year with $134.2 million in cash, cash equivalents and short-term investments,
and no long-term debt.

*See page 12A for reconciliation of Quarterly EBITDA with 2005 Quarterly Net Income. 

CoStar Group  |  2005 Annual Report

 
 
SALES ORGANIZATION SHIFTS INTO HIGHER GEAR 

Our sales team turned in an outstanding performance in 2005. We produced a 49 percent year-
over-year increase in sales growth, going from $14.8 million in annualized net new U.S. sales in
2004 to $21.9 million in annualized net new sales in 2005. The fourth quarter represented our
eighth consecutive quarter with a sequential increase in net new sales, and January 2006 was
our highest sales month ever. These very strong increases are driven by, among other things, a
larger sales force, a lower sales force turnover rate, new expansion market opportunities and
institutional sales opportunities. 

Reducing our sales turnover rate in 2004 has had a meaningful impact on 2005 sales results.
With a more tenured and experienced field sales force, the average net new U.S. subscription
sales produced by each field sales rep grew by 22 percent. At the same time, we saw a lower
absolute dollar value of cancelled contracts and an increase in new contract value. 

In 2005, we established a dedicated institutional sales team to focus on selling our products
and services to large institutions such as investment banks, rating agencies, CMBS investors,
pension advisors and other large financial organizations with multi-market commercial real
estate information needs. This effort and strategy has paid off. Sales of larger institutional con-
tracts with a value of $41,000 or more increased 108 percent from $1.2 million in 2004 to $2.5
million in 2005. We plan to leverage this success by establishing additional vertical sales teams
where appropriate. 

Finally, the 2004 launch of our new online advertising program has proven to be remarkably
productive. In 2005, sales of online ads more than doubled from the previous year while recog-
nized advertising revenue grew by more than 125 percent during the same period.

CUSTOMERS USE, RENEW, BUY MORE 

We added more than 2,000 new U.S. customers during the course of 2005, up 50 percent from the
number added in 2004. 

Based on our experience with product usage, renewal rates and cross-selling activity, we con-
tinue to enjoy high levels of customer satisfaction. This is evident in the increased usage we
have seen of our subscription services. Average weekly subscriber page views in U.S. CoStar
web services climbed more than 45 percent over a 12-month period ending mid-February 2006. 

The satisfaction level among our existing customers as measured by renewal rates also contin-
ues to grow. The renewal rate for CoStar’s subscription services increased from approximately
92 percent in 2004 to approximately 94 percent in 2005. Given the fact that we will always have
some percentage of firms going out of business, merging or leaving commercial real estate, we
believe these renewal rates are truly remarkable.

EXPANSION MARKETS
Birmingham  
Greensboro/Winston-Salem
Greenville-Spartanburg
Hampton Roads
Hartford
Las Vegas
Madison
Memphis
Milwaukee
Minneapolis/St. Paul
Nashville
Oklahoma City 
Providence
Richmond
Salt Lake City
San Antonio
Southwest Florida
Toledo
Tucson
Tulsa
Western Michigan

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Cross-selling to existing customers generated $9.3 million in annualized net new sales in 2005,
up 15 percent from $8.1 million in 2004. As our customer base expands and we increase the
scope of our product offerings, we expect sales to our existing customers to continue to rise. 

THE COMPLETION OF A 21 U.S. MARKET EXPANSION

As you know, we’ve been hard at work for the past two years planning and implementing an
expansion into 21 U.S. markets. I’m very pleased to report the successful completion of that effort.  

In these markets, we’ve photographed approximately 238,000 properties and are researching
over 5 billion square feet of gross building area. This is a huge accomplishment. Not only are
the numbers impressive, but in each of these markets, I believe we’ve delivered a vastly supe-
rior database and service than what was previously available in any of these markets. 

In market after market, our reception has been positive and sales have been strong. As soon as
real estate firms in these cities see CoStar Property Professional in action, they understand how
CoStar increases their opportunities to make a commission. They begin to understand how
CoStar will make their local listings more visible to important national and international lenders
and investors, as well as help them grow their business outside their local market. 

Already we’ve signed up 231 new customers. As our services gain wider adoption throughout
these markets, we believe many more customers will follow.  

THE LAUNCH OF COSTAR COMMERCIAL MLS

We’ve long been the leader in leasing information, comparable sales data, market trends, ana-
lytics and tenant prospecting. In 2005 we took two steps to help us take the lead in for-sale
information as well. First, we dramatically improved our for-sale information by increasing the
distribution of our for-sale data. Second, in November 2005, we delivered a low-cost, for-sale
product distributed solely via the Internet called CoStar Commercial MLS.

As a result of our now-greater audience for for-sale listings, brokers are sending us even more
listings. As of January 1, 2005, we had nearly 53,000 properties listed for sale in the United
States. That number had more than tripled by early April 2006 to over 160,000 properties list-
ed for sale. For the markets we cover, I believe we now have the most commercial real estate
for-sale listings in aggregate of any information service. 

CoStar Commercial MLS is our first subscription product that relies on a pure Internet customer
acquisition model. Neither our field nor our telesales groups handle sales for Commercial MLS.
Customers  can  subscribe  online  and  access  details  on  over  160,000  verified  commercial

CoStar Group  |  2005 Annual Report

 
 
properties listed for sale, nationwide. This service opens up a whole new market segment for
us  — hundreds of thousands of smaller brokerages, sole practitioners and residential agents
who buy and sell the occasional commercial property. CoStar Commercial MLS is offered free
on a trial basis and then $19.95 per month. 

More than 30,000 people have signed up to use CoStar Commercial MLS in the five months
since it first premiered. We’re encouraged that this service is resonating. We believe CoStar
Commercial MLS will be a valuable customer acquisition tool going forward, providing us
with upsell opportunities as these individuals use and learn more about CoStar. Already, our
sales  force  has  converted  a  number  of  CoStar  Commercial  MLS  users  into  Property  and
COMPS customers. 

MAKING RETAIL A REALITY

The retail segment is enormous and includes many different professional players — shopping
center owners, multi-unit retailers, brokers and brokerage firms specializing in retail properties
as well as lenders and investors interested in retail. We believe there is a clear need for our serv-
ice in this sector. Retailers are trying to open or close stores more effectively, developers are
searching for the right mix of retail tenants and brokers are trying to make a living in this infor-
mation-starved business. We see an opportunity to completely transform the way this industry
approaches its real estate information needs.

Therefore,  in  January  2005,  we  acquired  National  Research  Bureau  (NRB),  the  premier
provider of property information to the shopping center industry. This acquisition brought us
hundreds of prestigious retailers as customers such as CVS, JC Penney, Nokia and Payless
ShoeSource.  More  importantly,  it  gave  us  an  outstanding  platform  for  growing  our  retail
offering organically. 

Throughout the year, we’ve photographed and researched over 148,000 retail properties and
invested in new software and systems to deliver a truly robust retail offering. 

We’ve been overwhelmed with encouragement from everyone who has seen it. It packages tra-
ditional  CoStar  Property  Professional  services  with  geographic  and  retailer-specific  tenant
information  along  with  Claritas  demographic  details.  It  includes  a  new,  powerful  proximity
search capability with on-the-fly mapping and customized reporting capability. 

We plan to unveil our retail offering at the 2006 International Council of Shopping Centers
(ICSC) conference in May, and I look forward to reporting to you on its success. 

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GROWING INTERNATIONALLY

We are also making significant progress with our FOCUS subsidiary in the United Kingdom. In
2004, we introduced field research in the U.K. and carried out a major quality upgrade of our
FOCUS  service  in  London  and  Manchester.  In  June  2004,  we  expanded  our  coverage  into
Scotland with the purchase of Scottish Property Network, Scotland’s leading provider of sub-
scription-based space availability and transaction reporting. Additionally, we have leveraged
CoStar’s investment in software development by deploying elements, such as map searching
and display, in the U.K. The overall impact of these combined initiatives is clear. FOCUS has dou-
bled the size of its U.K. client base in just three years, after having been in business for 21 years.
Finally, we are beginning to see that our subscribers in the U.S. and U.K. can benefit from access
to each other’s information and are prepared to pay for it.

LOOKING FORWARD 

Across all measures — record sales, high customer renewal rates, a strong competitive posi-
tion, record listing information, exponential growth in Internet traffic, and favorable reception
from  new  geographic  markets  —  CoStar  has  had  a  remarkable  year.  The  CoStar  brand  is
stronger than ever and we’re able to leverage that preeminent brand position to make inroads
in new areas, such as our Internet sales model and new retail offering.

As we have many times over the years, we are making investments today that we believe will
result in stronger future growth, and I look forward to updating you on our progress.

Andrew C. Florance
President and Chief Executive Officer
CoStar Group, Inc.

CoStar Group  |  2005 Annual Report

 
 
Our 
Services

COSTAR PROPERTY PROFESSIONAL®

CoStar Property Professional, or “CoStar Property,” is the Company’s flagship service. It pro-
vides subscribers a comprehensive inventory of office, industrial and retail properties in mar-
kets throughout the United States, including for-lease and for-sale listings, historical data,
building photographs, maps and floor plans. Commercial real estate professionals use CoStar
Property to identify available space for lease, evaluate leasing and sale opportunities, value
assets and position properties in the marketplace. Our clients also use CoStar Property to
analyze market conditions by calculating current vacancy rates, absorption rates or average
rental rates, and forecasting future trends based on user-selected variables. CoStar Property
provides  subscribers  with  powerful  map-based  search  capabilities  as  well  as  a  user-con-
trolled, password-protected extranet (or electronic “file cabinet”) where brokers may share
space surveys and transaction-related documents online in real time with team members.
When used together with CoStar Connect, CoStar Property enables subscribers to share space
surveys and transaction-related documents with their clients, accessed through their corpo-
rate web site. CoStar Property, along with all of CoStar’s other core information services, are
delivered solely via the Internet. 

COSTAR PROPERTY EXPRESS ®

CoStar Property Express provides access, on demand with a credit card or via an annual sub-
scription, to a “light” or scaled-down version of CoStar Property. Commercial real estate pro-
fessionals  use  CoStar  Property  Express  to  look  up  and  search  for-lease  and 
for-sale listings in CoStar’s comprehensive national database. CoStar Property Express pro-
vides base-building information, photos, floor plans, maps and a limited number of reports. 

COSTAR COMPS PROFESSIONAL®

CoStar COMPS Professional provides comprehensive national coverage of comparable sales
information in the U.S. commercial real estate industry. It is the industry’s most comprehen-
sive database of comparable sales transactions and is designed for professionals who need
to research property comparables, identify market trends, expedite the appraisal process and
support property valuations. 

COSTAR COMPS EXPRESS®

CoStar COMPS Express provides users with immediate, subscription-free access with a cred-
it card to the CoStar COMPS Professional system on a report-by-report basis. Subscribers also
use this on-demand service to research comparable sales information outside of their sub-
scription markets.

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COSTAR TENANT ®

CoStar Tenant is a detailed online business-to-business prospecting and analytical tool pro-
viding commercial real estate professionals with the most comprehensive real estate-related
U.S. tenant information available. CoStar Tenant profiles tenants occupying space in commer-
cial buildings across the United States and provides updates on lease expirations — one of
the service’s key features — as well as occupancy levels, growth rates and numerous other
facts. Delivering this information via the Internet allows users to target prospective clients
quickly through a searchable database that identifies only those tenants meeting certain cri-
teria. CoStar Tenant subscribers can also obtain credit reports through CoStar Tenant directly
from D&B®. 

FOCUS

Our U.K. subsidiary, FOCUS Information Limited, offers several services under the trade name
FOCUS. The primary service, New FOCUS, is a digital online service offering information on the
U.K. commercial real estate market. This service seamlessly links data on individual proper-
ties  and  companies  including  comparable  sales,  available  space,  requirements,  tenants,
lease deals, planning information, socio-economics and demographics, credit ratings, photos
and maps across the United Kingdom. In addition, FOCUS Information’s subsidiary, Scottish
Property Network Limited, offers users on-line access to a comprehensive database of infor-
mation for properties located in Scotland, including available space, comparable sales, and
lease deals. 

COSTAR CONNECT®

CoStar Connect allows commercial real estate firms to license CoStar’s technology and infor-
mation to market their U.S. property listings on their corporate web sites. Customers enhance
the quality and depth of their listing information through access to CoStar’s database of con-
tent and digital images. The service automatically updates and manages customers’ online
property information, providing comprehensive listings coverage and significantly reducing
the expense of building their web sites’ content and functionality. 

COSTAR ADVERTISING®

CoStar Advertising offers property owners a highly targeted and cost-effective way to market
a space for lease or for sale directly to the individuals looking for that type of space through
interactive  advertising.  Our  advertising  model  is  based  on  varying  levels  of  exposure,
enabling the advertiser to target as narrowly or broadly as its budget permits. With the CoStar
Advertising program, when the advertiser’s listings appear in a results set, they receive prior-
ity positioning and are enhanced to stand out. The advertiser can also purchase exposure in
additional submarkets, or the entire market area so that his ad will appear even when his list-
ing would not be returned in a results set.

CoStar Group  |  2005 Annual Report

 
 
NRB SHOPPING CENTER DIRECTORYTM

As a result of our January 2005 acquisition of National Research Bureau, we now offer access
to  a  comprehensive  database  of  U.S.  shopping  center  information.  The  Shopping  Center
Directory includes shopping center names, locations, tenants, gross leaseable area, space
availability and contact information for owners, tenants, leasing agents and managers. The
Shopping Center Directory is available in print as well as CD-ROM format, the latter of which
offers additional data, indices and search capabilities.

COSTAR EXCHANGE®

CoStar Exchange is a database of commercial real estate properties that have been listed for sale.
The Company believes CoStar Exchange is the only industry database that combines for-sale list-
ings with correlating data on space availability, tenants, comparable sales and digital images,
enabling professionals to post and search for properties quickly and efficiently.  CoStar Exchange
represents an efficient means for sellers to reach a large audience and for buyers to identify tar-
get properties.  

COSTAR COMMERCIAL MLSTM

In 2005, we launched CoStar Commercial MLS, which is the industry’s most comprehensive
collection of researched for-sale listings. CoStar Commercial MLS draws upon CoStar’s large
database of digital  images and  includes  office,  industrial  and  retail properties,  as well as
shopping centers and raw land. CoStar Commercial MLS represents an efficient means for
sellers to market their properties to a large audience and for buyers to easily identify target
properties. 

COSTAR PROFESSIONAL DIRECTORY®

CoStar Professional Directory, a service available exclusively to CoStar Property Professional
subscribers, provides detailed contact information for over 690,000 commercial real estate
professionals, including specific information about an individual’s current and prior activities
such as completed transactions, current landlord representation assignments, sublet listings,
major tenants and owners represented and local and national affiliations. Commercial real
estate  brokers  can  input  their  biographical  information  and  credentials  and  upload  their
photo to create personal profiles. Subscribers use CoStar Professional Directory to network
with their peers, identify and evaluate potential business partners, and maintain accurate
mailing lists of other industry professionals for their direct mail marketing efforts.

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COSTAR MARKET REPORTTM

The CoStar Market Report provides in-depth current and historical analytical information cov-
ering 44 of the major metropolitan office and industrial markets in the United States and two
retail markets in the United States. Published quarterly, each market report includes details
such as absorption rates, vacancy rates, rental rates, average sales prices, capitalization rates,
existing inventory and current construction activity. This data is presented using standard def-
initions and calculations developed by CoStar, and offers real estate professionals critical and
unbiased information necessary to make intelligent commercial real estate decisions. CoStar
Market Reports are available to CoStar Property Professional subscribers at no additional
charge, and are available for purchase by nonsubscribers.

METROPOLIS

The Metropolis service is a single interface that combines commercial real estate data from
multiple information providers into a comprehensive resource. The Metropolis service allows
a user to input a property address and then view detailed information on that property from
multiple information providers, including CoStar services. This technology offers commercial
real estate professionals a simple and convenient solution for integrating a wealth of third-
party information and proprietary data, and is currently available for the Southern California
markets.

COSTAR NEWSTM

Our web site, our CoStar services and our e-mail news dispatches have become an accepted
source of reliable industry news. In 2005, we published approximately 9,500 news stories.
Our news services keep clients informed of late-breaking commercial real estate news such
as major leasing transactions, acquisitions, new construction activity, key industry personnel
moves and industry events. 

COSTAR PHOTO EXPRESSTM

In 2005, we launched CoStar Photo Express — a service designed to enable CoStar Property
Professional subscribers to lawfully post CoStar photos on Internet listing services.     

CoStar Group  |  2005 Annual Report

 
 
CoStar Group  
2005 Annual Report

To understand what we are all about, 
you need only look as far as our
customers.  

Our customers represent a broad range of companies and people. They include com-
mercial  real  estate  brokers.  Owners.  Investors.  Lenders.  Advisors.  Appraisers.  They
include residential agents selling the occasional commercial property.  They work for
national companies and small, local offices. Some are entrepreneurs. Others are the
world’s largest institutional players.  

Our services are tailored to meet their many needs.  As diverse as those needs are, a
singular need unites them all:  researched, accurate, up-to-date commercial real estate
information.  Information that is reliable.  Information that will help them identify, assess
and act on opportunity.  CoStar customers know they can depend on our subscription
and on-demand services such as CoStar Property®, CoStar COMPS®, CoStar Tenant®,
CoStar Commercial MLSTM and FOCUS for the information and insight they need to do
their jobs. 

“With CoStar, I save valuable time and produce
better results for my clients.”

Mark B. Warlick, SIOR
Senior Vice President, S. L. Nusbaum Realty Co.

“CoStar had the information I needed, and they
even helped me put together the presentation.”

Jim Eagle
President, Red Oak Realty

“With CoStar, I save valuable time and produce
better results for my clients.”

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Sharon Gage
Managing Broker, Patt, White Commercial

“Immediate access to current and accurate
information is critical. That’s why I chose CoStar.” 

Dan Briner, CCIM
Principal, The Briner Property Group

“CoStar gives me access to market knowledge I
cannot get from other sources. It is an invaluable
resource that helps me better serve my clients.”

William E. King, SIOR
Vice President, NAI Harvey Lindsay

CoStar Group  |  2005 Annual Report

Major
Signings

We value our longstanding relationships with many of the industry’s leading commercial
real estate firms and take great pride in the fact that these firms continue to extend and
expand their relationships with us.  During 2005, CoStar Group signed new contracts and
renewal agreements with some of our largest customers while introducing our services to
over 2,000 new customers. Notable 2005 signings include:

COMMERCIAL REAL ESTATE SERVICES

INSTITUTIONAL INVESTORS

Duff & Phelps
KBS Realty Advisors
BlackRock, Inc.
Principal Global Investors
JP Morgan Asset Management
Morgan Stanley Mortgage Capital Inc.

GOVERNMENT AGENCIES

General Services Administration 
Internal Revenue Service

APPRAISAL/VALUATION

Deloitte & Touche
Integra Realty Resources
American Appraisal Associates

Trammell Crow Co. 
The Staubach Company
Coldwell Banker Commercial NRT
Transwestern Commercial Services
Grubb & Ellis|BRE Commercial
RE/Max of California & Hawaii
NAI Capital Commercial Real Estate
Charles Dunn Company, Inc.
NAI Welsh
GVA Kidder Mathews

PROPERTY OWNERS

Equity Office Properties Trust
Trizec Properties, Inc.
Duke Realty Corporation 
Crescent Real Estate Equities Company
Glenborough Realty Trust Inc.

LENDERS/FINANCIAL SERVICES

CW Capital, LLC
Imperial Capital Bank
NorthMarq Capital, Inc.
East West Bank
BayView Financial
CapitalSource Finance, LLC
Commercial Capital Bank
Hypo Real Estate Capital Corporation
Fifth Third Bank

UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549 

FORM 10-K 

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF 
THE SECURITIES EXCHANGE ACT OF 1934 

For the fiscal year ended December 31, 2005 

Commission file number 0-24531 

CoStar Group, Inc. 
(Exact name of registrant as specified in its charter) 

Delaware 
(State or other jurisdiction of 
incorporation or organization) 

52-2091509 
(I.R.S. Employer 
Identification No.) 

2 Bethesda Metro Center, 10th Floor 
Bethesda, Maryland 20814 
(Address of principal executive offices) (zip code) 

(301) 215-8300 
Registrant’s telephone number, including area code 

Securities registered pursuant to Section 12(b) of the Act: 
None 
Securities registered pursuant to Section 12(g) of the Act: 
Common Stock ($.01 par value) 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes [X ] No [  ] 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes [  ] No [X] 

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act 
of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject 
to such filing requirements of the past 90 days. Yes [ X ] No [  ] 

Indicate  by  check  mark  if  disclosure  of  delinquent  filers  pursuant  to  Item  405  of  Regulation  S-K  is  not  contained  herein,  and  will  not  be 
contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 
10-K or any amendment to this Form 10-K. [ X ] 

Indicate  by  check  mark  whether  the  registrant  is  a  large  accelerated  filer,  an  accelerated  filer,  or  a  non-accelerated  filer.    See  definition  of 
“accelerated filer and large accelerated filer” in Rule 12b-2 of the Securities Exchange Act of 1934).  

Large accelerated filer [X ]  

Accelerated filer [   ]  

Non-accelerated filer [  ] 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes [  ] No [ X ] 

Based  on  the  closing  price  of  the  common  stock  on  June  30,  2005  on  the  Nasdaq  Stock  Market®,  the  aggregate  market  value  of  registrant’s 
common stock held by non-affiliates of the registrant was approximately $732.8 million. 

As of February 21, 2006, there were 18,676,814 shares of the registrant’s common stock outstanding. 

DOCUMENTS INCORPORATED BY REFERENCE 

Portions of the registrant’s definitive proxy statement, which is expected to be filed with the Securities and Exchange Commission within 120 
days after the end of the registrant’s fiscal year ended December 31, 2005, are incorporated by reference into Part III of this Report. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TABLE OF CONTENTS 

PART I 
  Item 1. 
Business ............................................................................................................................................
  Item 1A.  Risk Factors ......................................................................................................................................
  Item 1B.  Unresolved Staff Comments .............................................................................................................
Properties ..........................................................................................................................................
  Item 2. 
Legal Proceedings.............................................................................................................................
  Item 3. 
Submission of Matters to a Vote of Security Holders.......................................................................
  Item 4. 

  3 
 12 
 18 
 18 
 18 
 18 

PART II 
  Item 5. 

Market for the Registrant’s Common Stock, Related Stockholder Matters and Issuer Purchases 

Selected Consolidated Financial and Operating Data .......................................................................
  Item 6. 
Management’s Discussion and Analysis of Financial Condition and Results of Operations............
  Item 7. 
  Item 7A.  Quantitative and Qualitative Disclosures about Market Risk ...........................................................
Financial Statements and Supplementary Data.................................................................................
  Item 8. 
  Item 9. 
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure ...........
  Item 9A.  Controls and Procedures ...................................................................................................................
  Item 9B.  Other Information .............................................................................................................................

of Equity Securities ....................................................................................................................... 19 
 20 
 21 
 32 
 32 
 33 
 33 
 34 

PART III 
  Item 10. 
  Item 11. 
  Item 12. 

  Item 13. 
  Item 14. 

PART IV 
  Item 15. 

Directors and Executive Officers of the Registrant ..........................................................................
Executive Compensation ..................................................................................................................
Security Ownership of Certain Beneficial Owners and Management and Related  
  Stockholder Matters.......................................................................................................................
Certain Relationships and Related Transactions...............................................................................
Principal Accountant Fees and Services ...........................................................................................

 34 
 34 

 34 
 34 
 34 

 34 
Exhibits and Financial Statement Schedules ....................................................................................
 35 
Signatures .........................................................................................................................................
Index to Exhibits...............................................................................................................................
 36 
Index to Consolidated Financial Statements ..................................................................................... F-1 

2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 1.   Business 

PART I 

(In this report, the words “we,” “our,” “us,” “CoStar” or the “Company” refer to CoStar Group, Inc. and its 
direct and indirect subsidiaries. This report also refers to our web sites, but information contained on those sites 
is not part of this report.) 

CoStar Group, Inc., a Delaware corporation, is the leading provider of information services to the commercial 
real  estate  industry  in  the  United  States  and  United  Kingdom  based  on  the  fact  that  we  offer  the  most 
comprehensive commercial real estate database available, have the largest research department in the industry, 
provide more information services than any of our competitors and believe we generate more revenues than any 
of  our  competitors.  CoStar’s  integrated  suite  of  services  offers  customers  online  access  to  the  most 
comprehensive database of commercial real estate information, which has been researched and verified by our 
team  of  researchers,  currently  covering  66  U.S.  markets  as  well  as  London  and  other  parts  of  the  United 
Kingdom. CoStar operates within one business segment. 

Since its founding in 1987, CoStar’s strategy has been to provide commercial real estate professionals with 
critical  knowledge  to  explore  and  complete  transactions,  by  offering  the  most  comprehensive,  timely  and 
standardized  information  on  commercial  real  estate.  As  a  result  of  our  January  2003  acquisition  of  Property 
Intelligence  plc  and  June  2004  acquisition  of  Scottish  Property  Network,  we  have  extended  our  offering  of 
comprehensive  commercial  real  estate  information  to  include  London,  Scotland  and  other  U.K.  markets. 
Information about CoStar’s revenues from, and long-lived assets located in, foreign countries is included in Note 
3  to  the  notes  to  our  consolidated  financial  statements.  Information  about  risks  attendant  to  our  foreign 
operations is included in “Item 7A. Quantitative and Qualitative Disclosures about Market Risk.”   

We  deliver  our  content  to  customers  via  an  integrated  suite  of  online  service  offerings  that  includes 
information about space available for lease, comparable sales information, tenant information, information about 
properties for sale, property information for clients’ web sites, information about industry professionals and their 
business  relationships,  analytic  information,  data  integration,  property  marketing  and  industry  news.  We  have 
created  and  are  continuing  to  improve  a  standardized  information  platform  where  the  commercial  real  estate 
industry  and  related  businesses  can  continuously  interact  and  easily  facilitate  transactions  due  to  the  efficient 
exchange of accurate information supplied by CoStar. 

We have a number of assets that provide a unique foundation for our multinational platform, including the 
most  comprehensive  proprietary  database  in  the  industry;  the  largest  research  department  in  the  industry; 
proprietary  data  collection,  information  management  and  quality  control  systems;  a  large  in-house  product 
development team; a broad suite of web-based information services; and a large base of clients. Our database has 
been developed  and  enhanced  for  more  than  18  years by a  research department  that  makes  thousands  of daily 
updates to our database. In addition to our internal efforts to grow the database, we have obtained and assimilated 
over 50 proprietary databases.   

CoStar intends to continue to grow its standardized platform of commercial real estate information.  In 2004, 
CoStar began research for a 21-market U.S. expansion effort.  As of February 21, 2006, CoStar had successfully 
launched  service  in  each  of  those  21  markets.    In  addition,  following  our  acquisition  of  National  Research 
Bureau  in  January  2005,  we  launched  various  research  initiatives  as  part  of  our  expansion  into  real  estate 
information for retail properties.  CoStar intends to continue to expand its coverage of retail properties over the 
next several years. 

Our  subscription-based  information  services,  consisting  primarily  of  CoStar  Property  Professional,  CoStar 
Tenant,  CoStar  COMPS  Professional and  FOCUS  services,  currently  generate  approximately  95%  of  our  total 
revenues. Our contracts for our subscription-based information services typically have a minimum term of one 
year and renew automatically. Upon renewal, many of the subscription contract rates may increase in accordance 
with  contract  provisions  or  as  a  result  of  contract  renegotiations.  To  encourage  clients  to  use  our  services 
regularly, we generally charge a fixed monthly amount for our subscription-based services rather than fees based 
on actual system usage. Contract rates are based on the number of sites, number of users, organization size, the 
client’s business focus and the number of services to which a client subscribes. Our subscription clients generally 
pay contract fees on a monthly basis, but in some cases may pay us on a quarterly or annual basis.   

3 

 
 
 
 
 
 
 
 
Industry Overview 

The  market  for  commercial  real  estate  information  is  vast  based  on  the  variety,  volume  and  value  of 
transactions  related  to  commercial  real  estate.  Each  transaction  has  multiple  participants  and  multiple 
information  requirements,  and  in  order  to  facilitate  transactions,  industry  participants  must  have  extensive, 
accurate and current information. Members of the commercial real estate and related business community require 
daily  access  to  current  data  such  as  space  availability,  rental  rates,  vacancy  rates,  tenant  movements,  sales 
comparables, supply, new construction, absorption rates and other important market developments to carry out 
their  businesses  effectively.  There  is  a  strong  need  for  an  efficient  marketplace,  where  commercial  real  estate 
professionals  can  exchange  information,  evaluate  opportunities  using  standardized  data  and  interact  with  each 
other on a continuous basis. 

A large number of parties involved in the commercial real estate and related business community make use of 

the services we provide in order to obtain information they need to conduct their businesses, including: 

•  Sales and leasing brokers 
•  Property owners 
•  Property managers 
•  Design and construction professionals 
•  Real estate developers 
•  Real estate investment trust managers 
• 
Investment bankers 
•  Commercial bankers 
•  Mortgage bankers 
•  Mortgage brokers 
•  Retailers 

• Government agencies’ staff members 
• Mortgage-backed security issuers 
• Appraisers 
• Pension fund managers 
• Reporters 
• Tenant vendors 
• Building services vendors 
• Communications providers 
• Insurance companies’ managers 
• Institutional advisors 
• Investors and asset managers 

The  commercial  real  estate  and  related  business  community  generally  has  operated  in  an  inefficient 
marketplace  because  of  the  fragmented  approach  to  gathering  and  exchanging  information  within  the 
marketplace.  Various  organizations,  including  hundreds  of  brokerage  firms,  directory  publishers  and  local 
research companies, collect data on specific markets and develop software to analyze the information they have 
independently  gathered.  This  highly  fragmented  methodology  has  resulted  in  duplication  of  effort  in  the 
collection  and  analysis  of  information,  excessive  internal  cost  and  the  creation  of  non-standardized  data 
containing varying degrees of accuracy and comprehensiveness, resulting in a formidable information gap. 

The  creation  of  a  standardized  information  platform  for  commercial  real  estate  requires  an  infrastructure 
including a standardized database, accurate and comprehensive research capabilities, easy to use technology and 
intensive  participant  interaction.  By  combining  its  extensive  database,  approximately  713  researchers, 
technological expertise and broad customer base, CoStar believes that it has created such a platform. 

CoStar’s Comprehensive Database  

CoStar has spent more than 18 years building and acquiring a database of commercial real estate information, 
which includes information on leasing, sales, comparable sales, tenants, and demand statistics, as well as digital 
images. 

As of January 30, 2006, our database of real estate information covered 65 U.S. markets as well as London, 

England and other parts of the United Kingdom, and contained: 

•  More than 35.8 billion square feet of U.S. commercial real estate; 
•  Over 740,000 extensively researched and photographed properties in our U.S. database; 
•  Over 1.8 million total properties; 
•  Over 4.4 billion square feet of space available; 
•  Over 100,000 properties for sale; 
•  Over 3.8 million tenants occupying commercial real estate space; 
•  More than 1.3 million sales transactions valued in the aggregate at over $1.8 trillion; and 
•  Approximately  3.3  million  digital  images,  including  building  photographs,  aerial  photographs, 

plat maps and floor plans. 

4

 
 
 
 
 
 
 
 
 
 
 
 
 
This highly complex database is comprised of hundreds of data fields, tracking such categories as: 

•  Location 
•  Site and zoning information 
•  Building characteristics 
•  Space availability 
•  Tax assessments 
•  Ownership 
•  Sales and lease comparables 
•  Space requirements 
•  Number of retail stores  

CoStar Research 

• Mortgage and deed information 
• For-sale information 
• Income and expense histories 
• Tenant names 
• Lease expirations 
• Contact information 
• Historical trends 
• Demographic information 
• Retail sales per square foot 

We have developed a sophisticated data collection organization utilizing a multi-faceted research process. In 
2005,  our  researchers  drove  over  one  million  miles,  conducted  hundreds  of  thousands  of  on-site  building 
inspections, examined tens of millions of public records and interviewed millions of tenants, owners and brokers. 

Research  Department.  As  of  February  1,  2006,  we  employed  713  commercial  real  estate  research 
professionals.  Our  research  professionals  undergo  an  extensive  training  program  so  that  we  can  maintain 
consistent  research  methods  and  processes  throughout  our  research  department.  Our  researchers  collect  and 
analyze commercial real estate information through millions of phone calls, e-mails, Internet updates and faxes 
each  year,  in  addition  to  field  inspections,  public  records  review,  news  monitoring  and  direct  mail.  Each 
researcher  is  responsible  for  maintaining  the  accuracy  and  reliability  of  the  database.  As  part  of  their  update 
process,  researchers  develop  cooperative  relationships  with  industry  professionals  that  allow  them  to  gather 
useful  information.  Because  of  the  importance  commercial  real  estate  professionals  place  on  our  data  and  our 
prominent position in the industry, many of these professionals routinely take the initiative and proactively report 
available  space  and  transactions  to  our  researchers.    We  also  recently  began  outsourcing  a  limited  number  of 
research related projects to outside firms on a trial basis. 

CoStar has an extensive field research effort that permits physical inspection of properties in order to research 
new markets, find additional inventory, photograph properties and verify existing information. CoStar’s research 
efforts  have  traditionally  focused  on  office  and  industrial  properties.    Following  our  acquisition  of  National 
Research  Bureau  in  January 2005, we  launched  a  major expansion  effort  into  real  estate  information  for retail 
properties.  CoStar intends to continue to expand its coverage of retail properties over the next several years. 

Some  of  our  researchers  use  CoStar  custom-designed  trucks  equipped  with  computers,  proprietary  Global 
Positioning  System  tracking  software,  high  resolution  digital  cameras,  handheld  laser  instruments  to  help 
precisely measure buildings, geo-code them and position them on digital maps, and pneumatic masts that extend 
up  to  an  elevation  of  twenty-five  feet  so  as  to  allow  for  unobstructed  building  photographs  from  “bird’s-eye 
views.”  Each  CoStar  truck  uses  wireless  technology  to  track  and  transmit  field  data.  A  typical  site  inspection 
consists of photographing the building, measuring the building, geocoding the building, capturing “For Lease” 
sign information, counting parking spaces, assessing property condition and construction, and gathering tenant 
information.  Certain  researchers  canvass  properties,  interviewing  tenants  suite  by  suite.  Other  researchers 
conduct fieldwork in county courthouses and public records offices. In addition, many of our field researchers 
are photographers who take photographs of commercial real estate properties to add to the collection of CoStar’s 
digital images in our database.  Since we began our 21-market expansion in May 2004, our field researchers have 
photographed approximately 246,000 buildings and researched over 5 billion square feet of gross building area in 
the expansion markets.    

Data and Image Providers. We license a small portion of our data and images from public record providers 
and  third-party  data  sources.  Licensing  agreements  with  these  entities  provide  for  our  use  of  a  variety  of 
commercial  real  estate  information,  including  property  ownership,  tenant  information,  maps  and  aerial 
photographs, all of which enhance various CoStar services. These license agreements generally grant us a non-
exclusive license to use the data and images in the creation and supplementation of our information services and 
include what we believe are standard terms, such as a contract term ranging from two to five years, automatic 
renewal  of  the  contract  and  fixed  periodic  license  fees  or  a  combination  of  fixed  periodic  license  fees  plus 
additional fees based upon our usage. 

5

 
 
 
 
 
 
 
 
 
 
 
Management  and  Quality  Control  Systems.  Our  research  processes  include  automated  and  non-automated 
controls  to  ensure  the  integrity  of  the  data  collection  process.  A  large  number  of  automated  data  quality  tests 
check  for  potential  errors,  including  occupancy  date  conflicts,  available  square  footage  greater  than  building 
area, typical floor space greater than land area and expired leases. We also monitor changes to critical fields of 
information to ensure all information is kept in compliance with our standard definitions and methodology. Our 
non-automated quality control procedures include: 

•  calling our information sources on recently-updated properties to re-verify information;  
•  performing periodic research audits and field checks to determine if we correctly canvassed all buildings; 
•  providing training and retraining to our research professionals to ensure accurate data compilation; and 
•  compiling measurable performance metrics for research teams and managers for feedback on data quality. 

Finally, one of the most important and effective quality control measures we rely on is feedback provided by 

the commercial real estate professionals using our data every day. 

Proprietary Technology 

As of February 1, 2006, CoStar had a staff of 92 product development, database and network professionals.  
CoStar’s  information  technology  professionals  focus  on  developing  new  services  for  our  customers  and 
delivering  research  automation  tools  that  improve  the  quality  of  our  data  and  increase  the  efficiency  of  our 
research analysts.  

Our  information  technology  team  is  responsible  for  developing  the  infrastructure  necessary  to  support 
CoStar’s  business  processes,  our  comprehensive  database  of  commercial  real  estate  information  and  our 
extensive image library. The team implements technologies and systems that introduce efficient workflows and 
controls that increase the production capacity of our research teams and improve the quality of our data.  Over 
the years, the team has developed data collection and quality control mechanisms that we believe are unique to 
the  commercial  real  estate  industry.  The  team  continues  to  develop  and  modify  our  enterprise  information 
management  system  that  integrates  CoStar  sales,  research,  field  research,  customer  support  and  accounting 
information.  We use this system to maintain our commercial real estate research information, manage contacts 
with the commercial real estate community, provide research workflow automation and conduct daily automated 
quality assurance checks.   

Our  information  technology  professionals  also  maintain  the  servers  and  network  components  necessary  to 
support  CoStar  services  and  research  systems.    Our  encrypted  virtual  private  network  provides  remote 
researchers  and  salespeople  secure  access  to  CoStar  applications  and  network  resources.  CoStar  maintains  a 
comprehensive  data  protection  policy  that  provides  for  use  of  encrypted  data  fields  and  off-site  storage  of  all 
system backups, among other protective measures.  CoStar’s services are continually monitored in an effort to 
ensure our customers fast and reliable access.   

Services 

Our suite of information services is branded and marketed to our customers. Our services are derived from a 
database  of  building-specific  information  and  offer  customers  specialized  tools  for  accessing,  analyzing  and 
using our information. Over time, we expect to enhance our existing information services and develop additional 
services  that  make  use  of  our  comprehensive  database  to  meet  the  needs  of  our  existing  customers  as  well  as 
potential new categories of customers. 

Our various information services are described in detail in the following paragraphs: 

CoStar  Property  Professional®.    CoStar  Property  Professional,  or  “CoStar  Property,”  is  the  Company’s 
flagship service. It provides subscribers a comprehensive inventory of office, industrial and retail properties in 
markets  throughout  the  United  States,  including  for-lease  and  for-sale  listings,  historical  data,  building 
photographs,  maps  and  floor  plans.  Commercial  real  estate  professionals  use  CoStar  Property  to  identify 
available  space  for  lease,  evaluate  leasing  and  sale  opportunities,  value  assets  and  position  properties  in  the 
marketplace. Our clients also use CoStar Property to analyze market conditions by calculating current vacancy 
rates,  absorption  rates  or  average  rental  rates,  and  forecasting  future  trends  based  on  user-selected  variables. 

6

 
 
 
 
 
 
 
 
 
 
 
 
 
 
CoStar Property provides subscribers with powerful map-based search capabilities as well as a user-controlled, 
password-protected  extranet  (or  electronic  “file  cabinet”)  where  brokers  may  share  space  surveys  and 
transaction-related documents online in real time with team members. When used together with CoStar Connect, 
CoStar Property enables subscribers to share space surveys and transaction-related documents with their clients, 
accessed  through  their  corporate  web  site.  CoStar  Property,  along  with  all  of  CoStar’s  other  core  information 
services, are delivered solely via the Internet.   

CoStar Property Express®.  CoStar Property Express provides access, on-demand with a credit card or via an 
annual subscription, to a “light” or scaled-down version of CoStar Property. Commercial real estate professionals 
use  CoStar  Property  Express  to  look  up  and  search  for-lease  and  for-sale  listings  in  CoStar’s  comprehensive 
national database. CoStar Property Express provides base-building information, photos, floor plans, maps and a 
limited number of reports.  

CoStar COMPS Professional®.  CoStar COMPS Professional provides comprehensive national coverage of 
comparable sales information in the U.S. commercial real estate industry. It is the industry’s most comprehensive 
database  of  comparable  sales  transactions  and  is  designed  for  professionals  who  need  to  research  property 
comparables, identify market trends, expedite the appraisal process and support property valuations.  

CoStar COMPS Express®.  CoStar COMPS Express provides users with immediate, subscription-free access 
with a credit card to the CoStar COMPS Professional system on a report-by-report basis. Subscribers also use 
this on-demand service to research comparable sales information outside of their subscription markets. 

CoStar  Tenant®.  CoStar  Tenant  is  a  detailed  online  business-to-business  prospecting  and  analytical  tool 
providing  commercial  real  estate  professionals  with  the  most  comprehensive  real  estate-related  U.S.  tenant 
information available. CoStar Tenant profiles tenants occupying space in commercial buildings across the United 
States  and  provides  updates  on  lease  expirations  --  one  of  the  service’s  key  features  --  as  well  as  occupancy 
levels, growth rates and numerous other facts. Delivering this information via the Internet allows users to target 
prospective  clients  quickly  through  a  searchable  database  that  identifies  only  those  tenants  meeting  certain 
criteria. CoStar Tenant subscribers can also obtain credit reports through CoStar Tenant directly from D&B®..   

FOCUS.  Our  U.K.  subsidiary,  FOCUS  Information  Limited,  offers  several  services  under  the  trade  name 
FOCUS.  The  primary  service,  New  FOCUS,  is  a  digital  online  service  offering  information  on  the  U.K. 
commercial  real  estate  market.  This  service  seamlessly  links  data  on  individual  properties  and  companies 
including  comparable  sales,  available  space,  requirements,  tenants,  lease  deals,  planning  information,  socio-
economics and demographics, credit ratings, photos and maps across the United Kingdom. In addition, FOCUS 
Information’s  subsidiary,  Scottish  Property  Network  Limited,  offers  users  on-line  access  to  a  comprehensive 
database of information for properties located in Scotland, including available space, comparable sales, and lease 
deals.  

CoStar  Connect®.  CoStar  Connect  allows  commercial  real  estate  firms  to  license  CoStar’s  technology  and 
information  to  market  their  U.S.  property  listings  on  their  corporate  web  sites.  Customers  enhance  the  quality 
and  depth  of  their  listing  information  through  access  to  CoStar’s  database  of  content  and  digital  images.  The 
service  automatically  updates  and  manages  customers’  online  property  information,  providing  comprehensive 
listings coverage and significantly reducing the expense of building their web sites’ content and functionality.  

CoStar  Commercial  MLS™.  In 2005, we  launched  CoStar  Commercial  MLS,  which  is  the  industry’s  most 
comprehensive collection of researched for-sale listings.  CoStar Commercial MLS draws upon CoStar’s large 
database of digital images and includes office, industrial and retail properties, as well as shopping centers and 
raw land.  CoStar Commercial MLS represents an efficient means for sellers to market their properties to a large 
audience and for buyers to easily identify target properties.   

CoStar Advertising®.  CoStar Advertising offers property owners a highly targeted and cost-effective way to 
market a space for lease or for sale directly to the individuals looking for that type of space through interactive 
advertising.  Our  advertising  model  is  based  on  varying  levels  of  exposure,  enabling  the  advertiser  to  target  as 
narrowly or broadly as its budget permits. With the CoStar Advertising program, when the advertiser’s listings 
appear in a results set, they receive priority positioning and are enhanced to stand out. The advertiser can also 
purchase exposure in additional submarkets, or the entire market area so that his ad will appear even when his 
listing would not be returned in a results set. 

7

 
 
 
 
 
 
 
 
 
 
 
NRB  Shopping  Center  Directory™.    As  a  result  of  our  January  2005  acquisition  of  National  Research 
Bureau, we now offer access to a comprehensive database of U.S. shopping center information.  The Shopping 
Center Directory includes shopping center names, locations, tenants, gross leaseable area, space availability and 
contact  information  for  owners,  tenants,  leasing  agents  and  managers.    The  Shopping  Center  Directory  is 
available  in  print  as  well  as  CD-ROM  format,  the  latter  of  which  offers  additional  data,  indices  and  search 
capabilities. 

CoStar Exchange®. CoStar Exchange is a database of commercial real estate properties that have been listed 
for sale.  The Company believes CoStar Exchange is the only industry database that combines for-sale listings 
with correlating data on space availability, tenants, comparable sales and digital images, enabling professionals 
to  post  and  search  for  properties  quickly  and  efficiently.    CoStar  Exchange  represents  an  efficient  means  for 
sellers to reach a large audience and for buyers to identify target properties. 

CoStar  Professional  Directory®.  CoStar  Professional  Directory,  a  service  available  exclusively  to  CoStar 
Property Professional subscribers, provides detailed contact information for over 690,000 commercial real estate 
professionals, including specific information about an individual’s current and prior activities such as completed 
transactions, current landlord representation assignments, sublet listings,  major tenants and owners represented 
and local and national affiliations.  Commercial real estate brokers can input their biographical information and 
credentials and upload their photo to create personal profiles.  Subscribers use CoStar Professional Directory to 
network with their peers, identify and evaluate potential business partners, and maintain accurate mailing lists of 
other industry professionals for their direct mail marketing efforts. 

CoStar  Market  Report™.  The  CoStar  Market  Report  provides  in-depth  current  and  historical  analytical 
information  covering  44  of  the  major  metropolitan  office  and  industrial  markets  in  the  United  States  and  two 
retail  markets in the United States. Published quarterly, each market report includes details such as absorption 
rates,  vacancy  rates,  rental  rates,  average  sales  prices,  capitalization  rates,  existing  inventory  and  current 
construction activity. This data is presented using standard definitions and calculations developed by CoStar, and 
offers real estate professionals critical and unbiased information necessary to make intelligent commercial real 
estate  decisions.  CoStar  Market  Reports  are  available  to  CoStar  Property  Professional  subscribers  at  no 
additional charge, and are available for purchase by nonsubscribers. 

Metropolis™.  The  Metropolis  service  is  a  single  interface  that  combines  commercial  real  estate  data  from 
multiple information providers into a comprehensive resource. The Metropolis service allows a user to input a 
property  address  and  then  view  detailed  information  on  that  property  from  multiple  information  providers, 
including CoStar services. This technology offers commercial real estate professionals a simple and convenient 
solution for integrating a wealth of third-party information and proprietary data, and is currently available for the 
Southern California markets. 

CoStar News™. Our web site, our CoStar services and our e-mail news dispatches have become an accepted 
source  of  reliable  industry  news.  In  2005,  we  published  approximately  9,500  news  stories.  Our  news  services 
keep  clients  informed  of  late-breaking  commercial  real  estate  news  such  as  major  leasing  transactions, 
acquisitions, new construction activity, key industry personnel moves and industry events.   

CoStar Photo Express™. In 2005, we launched CoStar Photo Express ⎯ a service designed to enable CoStar 

Property Professional subscribers to lawfully post CoStar photos on Internet listing services.      

Clients 

We  draw  clients  from  across  the  commercial  real  estate  and  related  business  community.  Commercial  real 
estate brokers have traditionally formed the largest portion of CoStar clients, however, we also provide services 
to  owners,  landlords,  financial  institutions,  retailers,  vendors,  appraisers,  investment  banks  and  other  parties 
involved in commercial real estate. The following chart lists U.S. clients that are well known or have the highest 
annual subscription fees in each of the various categories and also lists U.K. clients that are well known or have 
the highest annual subscription fees in each of the various categories, each as of February 1, 2006. 

8

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Brokers 

Lenders, Investment Bankers 

Institutional Advisors, Asset Managers

CB Richard Ellis 
CB Richard Ellis — U.K. 
Colliers 
Colliers Conrad Ritblat Erdman — U.K. 
Cushman & Wakefield 
Cushman & Wakefield Healey & 
  Baker — U.K. 
Trammell Crow Co. 
Jones Lang LaSalle 
Jones Lang LaSalle — U.K. 
Grubb & Ellis 
Marcus & Millichap 
The Staubach Company 
Newmark & Company Real Estate 
CRESA Partners 
Studley 
Coldwell Banker Commercial NRT 
Equis 
GVA Williams 
GVA Advantis  
Binswanger 
Re/Max 
Carter  
United Systems Integrators Corp 
GVA Daum Finkelstein Comm Rlty    
  Services 
Finkelstein Comm Rlty Services  
U.S. Equities Realty 
CMD Realty Investors 
Sperry Van Ness 
HFF  
Mohr Partners 
Charles Dunn Company, Inc. 
GVA Grimley — U.K. 
King Sturge — U.K. 
Knight Frank — U.K. 
Donaldsons — U.K. 
Savills Commercial — U.K. 
Artisreal — U.K. 
Lambert Smith Hampton — U.K. 
Drivers Jonas — U.K. 
Gerald Eve — U.K. 

  GMAC Commercial Mortgage 
  GMAC — U.K. 
  Deutsche Bank 
  Wells Fargo 
  Washington Mutual 
  Wachovia Corporation 
  Merrill Lynch 
  Citibank 
  Fannie Mae 
  Morgan Stanley 

  Jones Lang LaSalle 
  Prudential  
  Prudential — U.K. 
  Metropolitan Life 

ING Clarion Partners 
  Bear Stearns & Co., Inc. 
  USAA Real Estate Company 
  Legg Mason 
  Morley — U.K. 
  AEW Capital Management LP 

Owners and Developers 

Appraisers, Accountants 

  Hines 
  LNR Property Corp 
  Shorenstein Properties 
  Gale Companies 
  Manulife Financial 

Industrial Developments International 

  Land Securities — U.K. 
  Slough Estates — U.K. 

Integra 

  Deloitte and Touche  
  Deloitte and Touche — U.K. 
  Marvin F. Poer  
  KPMG 
  GE Capital Small Business Finance Corp 
  PGP Valuation 
  PricewaterhouseCoopers 

REITS 

Government Agencies 

  Equity Office Properties Trust 
  Trizec Properties, Inc. 
  Prologis 
  Prentiss Properties 
  CarrAmerica 
  Boston Properties  
  Liberty Property Trust 

  U.S. General Services Administration 
  County of Los Angeles 
  Office of Technology Procurement 
  City of Chicago 
  Cook County Assessor’s Office 
  U.S. Department of Housing and Urban  

  Development 

  Corporation of London — U.K. 
  Scottish Enterprise – U.K. 

Property Managers 

  Transwestern Commercial Services 
  Lincoln Property Company 
  PM Realty Group 
  Navisys Group 
  Osprey Management Company 
  Leggat McCall Properties 

Vendors 

  Turner Construction Company 
  Kastle Systems  
  Comcast Cable Communications 
  Cisco Systems 
  MWB — U.K. 
  Regus — U.K. 

Ulta Salon, Cosmetics & Fragrance, Inc. 
DSR Marketing System 
Brown Shoe Company 
Payless Shoe Source, Inc. 
CVS 
JC Penney 

Retailers 

  The Children’s Place 

Charming Shoppes, Inc. 
ESRI, Inc. 
American Greetings 

  Data Source Technology, Inc. 
Merle Norman Cosmetics 
Nokia 

For the years ended December 31, 2003, 2004 and 2005, no single client accounted for more than 5% of our 
revenues.  Our  subscription-based  information  services  currently  generate  approximately  95%  of  our  total 
revenues. Our contracts for our subscription-based information services typically have a minimum term of one 
year and renew automatically. 

9

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Sales and Marketing 

As of February 1, 2006, we had 197 sales, marketing and customer support employees, with the majority of 
our direct sales force located in field sales offices. Our sales teams are primarily located in 28 field sales offices 
throughout the United States and in London, England, Manchester, England and Paisley, Scotland.  In 2005, we 
expanded our use of centralized inside sales teams at our Bethesda, Maryland office and created similar inside 
sales teams at our Columbia, Maryland and San Diego, California offices.  These inside sales teams prospect for 
new clients and perform service demonstrations exclusively by telephone and over the Internet.   

Our local offices typically serve as the platform for our in-market sales, customer support and field research 
operations for their respective regions. The sales force is responsible for selling to new prospects, training new 
and  existing  clients,  providing  ongoing  customer  support,  renewing  existing  client  contracts  and  identifying 
cross-selling opportunities. In addition, the sales force has primary front-line responsibility for customer care. 

Our  sales  strategy  is  to  aggressively  attract  new  clients,  while  providing  ongoing  incentives  for  existing 
clients to subscribe to additional services. We place a premium on training new and existing client personnel on 
the  use  of  our  services  so  as  to  promote  maximum  client  utilization  and  satisfaction  with  our  services.    Our 
strategy also involves entering into multi-year, multi-market license agreements with our larger clients. In 2005, 
we signed multi-year, multi-market renewal agreements with Grubb & Ellis Company, Marcus & Millichap, The 
Staubach Company, Trammell Crow Company, Equity Office Properties Trust and Coldwell Banker Commercial 
NRT. These license agreements grant non-exclusive licenses to these companies’ employees to use a variety of 
our information services. They typically have terms of a minimum of one year, generally renew automatically 
and require the payment of fixed monthly license fees. 

We seek to make our services essential to our clients’ businesses. To encourage clients to use our services 
regularly, we generally charge a fixed monthly amount for our subscription-based services rather than fees based 
on actual system usage. Contract rates are based on the number of sites, number of users, organization size, the 
client’s business focus and the number of services to which a client subscribes. Our subscription clients generally 
pay contract fees on a monthly basis, but in some cases may pay us on a quarterly or annual basis.  In addition, 
through  CoStar  Property  Express  and  CoStar  COMPS  Express,  clients  can  access  our  database  of  commercial 
real estate information without a subscription. 

Our customer service and support staff is charged with ensuring high client satisfaction by providing ongoing 

customer support.  

Our  primary  marketing  methods  include:  service  demonstrations;  face  to  face  networking;  Web-based 
marketing; direct marketing; communication via our corporate web site and news services; participation in trade 
show and industry events; print advertising in trade magazines and local business journals; client referrals and 
CoStar  Advisor™,  the  Company’s  newsletter,  which  is  distributed  to  our  clients  and  prospects.    Web-based 
marketing and direct marketing are the most cost-effective means for us to find prospective clients. Our Web-
based marketing efforts include advertising-related activities and our direct marketing efforts include direct mail 
and  telemarketing,  and  make  extensive  use  of  our  unique,  proprietary  database.  Once  we  have  identified  a 
prospective  client,  our  most  effective  sales  method  is  a  service  demonstration.  We  use  various  forms  of 
advertising  to  build  brand  identity  and  reinforce  the  value  and  benefits  of  our  services.  We  also  sponsor  and 
attend local association activities and events, and attend and/or exhibit at industry trade shows and conferences to 
reinforce our relationships with our core user groups. 

10

 
 
 
 
 
 
 
 
 
 
 
 
Competition 

The  market  for  information  services  generally  is  competitive  and  rapidly  changing.  In  the  commercial  real 
estate  industry,  the  principal  competitive  factors  for  commercial  real  estate  information  services  and  providers 
are: 

timeliness of the data;  

•  quality and depth of the underlying databases;  
•  ease of use, flexibility, and functionality of the software;  
• 
•  breadth of geographic coverage and services offered;  
•  client service and support;  
•  perception that the service offered is the industry standard;  
•  price;  
•  effectiveness of marketing and sales efforts;  
•  proprietary nature of methodologies, databases and technical resources; 
•  vendor reputation;  
•  brand loyalty among customers; and  
•  capital resources.  

We compete directly and indirectly for customers with the following categories of companies: 

•  online services or web sites targeted to commercial real estate brokers, buyers and sellers of commercial 
real  estate  properties,  insurance  companies,  mortgage  brokers  and  lenders,  such  as  LoopNet,  Inc.,  EGi, 
Cityfeet.com, Inc., officespace.com, MrOfficeSpace.com and TenantWise, Inc. 

•  publishers  and  distributors  of  information  services,  including  regional  providers  and  national  print 
publications,  such  as  Black’s  Guide,  Marshall  &  Swift,  Yale  Robbins,  Inc.,  Reis,  Inc.,  Real  Capital 
Analytics and Dorey Publishing and Information Services; 

• 

locally  controlled  real  estate  boards,  exchanges  or  associations  sponsoring  property  listing  services  and 
the companies with whom they partner, such as Xceligent, the Commercial Association of Realtors Data 
Services and the Association of Industrial Realtors; 

• 

in-house research departments operated by commercial real estate brokers; and 

•  public record providers.  

As  the  commercial  real  estate  information  marketplace  develops,  additional  competitors  (including 
companies  which  could  have  greater  access  to  data,  financial,  product  development,  technical  or  marketing 
resources  than  we  do)  may  enter  the  market  and  competition  may  intensify.  While  we  believe  that  we  have 
successfully differentiated ourselves from existing competitors, competition could materially harm our business. 

Proprietary Rights  

To protect our proprietary rights in our methodologies, database, software, trademarks and other intellectual 

property, we depend upon a combination of: 

trade secret, copyright, trademark, database protection and other laws;  

• 
•  nondisclosure, noncompetition and other contractual provisions with employees and consultants;  
• 
•  patent protection; and  
technical measures.  
• 

license agreements with customers;  

We  seek  to  protect  our  software’s  source  code  and  our  database  as  trade  secrets  and  under  copyright  law. 
Although  copyright  registration  is  not  a  prerequisite  for  copyright  protection,  we  have  filed  for  copyright 
registration  for  many  of  our  databases,  software  and  other  materials.  Under  current  U.S.  law,  the  arrangement 
and selection of data may be protected, but the actual data itself may not be. In addition, with respect to our U.K. 
databases,  certain  database  protection  laws  provide  additional  protections  of  these  databases.  We  license  our 

11

 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
services  under  license  agreements  that  grant  our  clients  non-exclusive,  non-transferable  licenses.  These 
agreements  restrict  the  disclosure  and  use  of  our  information  and  prohibit  the  unauthorized  reproduction  or 
transfer of the information services we license. 

We  also  attempt  to  protect  the  secrecy  of  our  proprietary  database,  our  trade  secrets  and  our  proprietary 
information  through  confidentiality  and  noncompetition  agreements  with  our  employees  and  consultants.  Our 
services  also  include  technical  measures  to  discourage  and  detect  unauthorized  copying  of  our  intellectual 
property. 

We have filed trademark applications to register trademarks for a variety of names for CoStar services and 
other marks, and have obtained registered trademarks for a variety of our marks, including “CoStar”, “COMPS”, 
“CoStar  Property”,  “CoStar  Tenant”  and  “CoStar  Group”.  Depending  upon  the  jurisdiction,  trademarks  are 
generally  valid  as  long  as  they  are  in  use  and/or  their  registrations  are  properly  maintained  and  they  have  not 
been found to become generic.  We consider our trademarks in the aggregate to constitute a valuable asset.  In 
addition,  we  have  filed  several  patent  applications  covering  certain  of  our  methodologies  and  software  and 
currently have one patent in the U.K. which expires in 2021 covering, among other things, certain of our field 
research methodologies and one patent in the U.S. which expires in 2022 covering, among other things, critical 
elements of CoStar’s proprietary field research technology.  We regard the rights under our patents as valuable to 
our business but do not believe that our business is materially dependent on any single patent.  

Employees 

As  of  February  1,  2006,  we  employed  1,076  employees.  None  of  our  employees  is  represented  by  a  labor 

union. We have experienced no work stoppages. We believe that our employee relations are excellent. 

Available Information 

Our investor relations Internet web site is http://www.costar.com/corporate/investor. The reports we file with 
or furnish to the Securities and Exchange Commission, including our annual report, quarterly reports and current 
reports,  are  available  free  of  charge  on  our  Internet  web  site  as  soon  as  reasonably  practicable  after  we 
electronically file such material with, or furnish it to, the Securities and Exchange Commission. 

Item 1A. Risk Factors 

Cautionary Statement Concerning Forward-Looking Statements 

We have made forward-looking statements in this report and make forward-looking statements in our press 
releases  and  conference  calls  that  are  subject  to  risks  and  uncertainties.  Forward-looking  statements  include 
information that is not purely historic fact and include, without limitation, statements concerning our financial 
outlook  for  2006  and  beyond;  our  possible  or  assumed  future  results  of  operations  generally;  and  other 
statements  and  information  regarding  assumptions  about  our  revenues,  EBITDA,  fully  diluted  net  income, 
taxable  income,  cash  flow  from  operating  activities,  available  cash,  operating  costs,  amortization  expense, 
intangible  asset  recovery,  net  income  per  share,  diluted  net  income  per  share,  weighted-average  outstanding 
shares,  capital  and  other  expenditures,  effective  tax  rate,  equity  compensation  charges,  future  taxable  income, 
purchase  amortization,  financing  plans,  geographic  expansion,  capital  structure,  contractual  obligations,  legal 
proceedings  and  claims,  our  database,  database  growth,  services  and  facilities,  employee  relations  and  future 
economic performance; management’s plans, goals and objectives for future operations; and growth and markets 
for  our  stock.  The  sections  of  this  report  which  contain  forward-looking  statements  include  “Business,”  “Risk 
Factors,”  “Properties,”  “Legal  Proceedings,”  “Management’s  Discussion  and  Analysis  of  Financial  Condition 
and  Results  of  Operations,”  “Quantitative  and  Qualitative  Disclosures  About  Market  Risk”  and  the  Financial 
Statements and related Notes. 

Our  forward-looking  statements  are  also  identified  by  words  such  as  “believes,”  “expects,”  “thinks,” 
“anticipates,”  “intends,”  “estimates”  or  similar  expressions.  You  should  understand  that  these  forward-looking 
statements  are  necessarily  estimates  reflecting  our  judgment,  not  guarantees  of  future  performance.  They  are 
subject  to  a  number  of  assumptions,  risks  and  uncertainties  that  could  cause  actual  results  to  differ  materially 
from those expressed or implied in the forward-looking statements. The following important factors, in addition 

12

 
 
 
 
 
 
 
 
 
 
 
 
 
 
to those discussed in “Risk Factors,” and other unforeseen events or circumstances, could affect our future results 
and  could  cause  those  results  or  other  outcomes  to  differ  materially  from  those  expressed  or  implied  in  our 
forward-looking statements: general economic conditions; customer retention; competition; our ability to identify 
and integrate acquisitions; our ability to control costs; our ability to continue to expand successfully; our ability 
to effectively penetrate the market for retail real estate information and gain acceptance in that market; litigation; 
changes or consolidations within the commercial real estate industry; release of new and upgraded services by us 
or our competitors; data quality; development of our sales force; employee retention; technical problems with our 
services;  managerial  execution;  changes  in  relationships  with  real  estate  brokers  and  other  strategic  partners; 
foreign  currency  fluctuations;  legal  and  regulatory  issues;  changes  in  accounting  policies  or  practices;  and 
successful adoption of and training on our services. 

Accordingly, you should not place undue reliance on forward-looking statements, which speak only as of the 
date of this report. All subsequent written and oral forward-looking statements attributable to us or any person 
acting on our behalf are expressly qualified in their entirety by the cautionary statements contained or referred to 
in  this  section.  We  do  not  undertake  any  obligation  to  update  any  such  statements  or  release  publicly  any 
revisions to these forward-looking statements to reflect events or circumstances after the date of this report or to 
reflect the occurrence of unanticipated events. 

Risk Factors 

 Our planned expansion into the retail real estate sector may not be completed successfully or may not result 
in increased revenues, which may negatively impact our business, results of operations and financial condition. 
Expanding  into  the  retail  real  estate  sector  imposes  additional  burdens  on  our  research,  systems  development, 
sales, marketing and general managerial resources. During the next year, we expect to significantly expand the 
number  of  retail  properties  contained  within  our  database.  If  we  are  unable  to  manage  this  expansion  plan 
effectively,  if  this  expansion  effort  takes  longer  than  planned  or  if  our  costs  for  this  effort  exceed  our 
expectations,  our  financial  condition  could  be  adversely  affected.  In  addition,  if  we  incur  significant  costs  to 
expand  into  the  retail  sector  and  we  are  not  successful  in  marketing  and  selling  our  expanded  services,  or 
customers fail to accept these new services, our expansion may have a material adverse effect on our financial 
condition by increasing our expenses without increasing our revenues, adversely affecting our profitability. 

Our  recently  completed  21-market  expansion  and  any  further  geographic  expansion  or  investment  of 
resources  to  expand  the  depth  of  our  coverage  within  existing  markets  may  not  result  in  increased  revenues, 
which  may  negatively  impact  our  business,  results  of  operations  and  financial  condition.  Expanding  into  new 
markets and investing resources towards increasing the depth of our coverage within existing markets imposes 
additional  burdens  on  our  research,  systems  development,  sales,  marketing  and  general  managerial  resources. 
During 2006, we expect to continue to expand into a number of new U.S. markets, expand geographic coverage 
in certain of our existing markets and increase the depth of our coverage in certain of our existing markets. If we 
are unable to manage these expansion efforts effectively, if the expansion efforts take longer than planned or if 
our  costs  for  these  efforts  exceed  our  expectations,  our  financial  condition  could  be  adversely  affected.  In 
addition, if we incur significant costs to expand into these new markets or to improve data quality within existing 
markets, or are not successful in marketing and selling our services in these markets, our expansion may have a 
material adverse effect on our financial condition by increasing our expenses without increasing our revenues, 
adversely affecting our profitability. 

Technical problems that affect either our customers’ ability to access our services, or the software, internal 
applications and systems underlying our services, could lead to reduced demand for our information services, 
lower  revenues  and  increased  costs.  Our  business  increasingly  depends  upon  the  satisfactory  performance, 
reliability and availability of our web site, the Internet and our service providers. Problems with our web site, the 
Internet  or  the  services  provided  by  our  local  exchange  carriers  or  Internet  service  providers  could  result  in 
slower connections for our customers or interfere with our customers’ access to our information services. If we 
experience  technical  problems  in  distributing  our  services,  we  could  experience  reduced  demand  for  our 
information  services.  In  addition,  the  software,  internal  applications  and  systems  underlying  our  services  are 
complex and may not be efficient or error-free. Despite careful development and testing, we cannot be certain 
that  we  will  not  encounter  technical  problems  when  we  attempt  to  enhance  our  software,  internal  applications 
and systems. For example, during the second quarter of 2005, we upgraded our internal research application used 
by our research staff to update our database of commercial real estate information. If this application does not 
continue to work properly, the ability of our clients to access our services may be affected, which could result in 

13

 
 
 
 
 
 
 
 
reduced  demand  for  our  services,  lower  revenues  and  higher  costs.  Any  inefficiencies,  errors  or  technical 
problems  with  our  software,  internal  applications  and  systems  could  reduce  the  quality  of  our  services  or 
interfere with our customers’ access to our information services, which could reduce the demand for our services, 
lower our revenues and increase our costs. 

Temporary or permanent outages of our computers, software or telecommunications equipment could lead to 
reduced demand for our information services, lower revenues and increased costs. Our operations depend on our 
ability  to  protect  our  database,  computers  and  software,  telecommunications  equipment  and  facilities  against 
damage  from  potential  dangers  such  as  fire,  power  loss,  security  breaches,  computer  viruses  and 
telecommunications failures. Any temporary or permanent loss of one or more of these systems or facilities from 
an accident, equipment malfunction or some other cause could harm our business. If we experience a failure that 
prevents  us  from  delivering  our  information  services  to  clients,  we  could  experience  reduced  demand  for  our 
information services, lower revenues and increased costs. 

Changes in accounting and reporting policies or practices may affect our financial results or presentation of 
results, which may affect our stock price. Changes in accounting and reporting policies or practices could reduce 
our net income, which reductions may be independent of changes in our operations. These reductions in reported 
net  income  could  cause  our  stock  price  to  decline.  For  example,  beginning  in  the  first  quarter  of  2006,  the 
Company expects to adopt the provisions of SFAS 123R, which will require us to expense the value of granted 
stock  options.  The  Company  is  continuing  to  assess  the  impact  of  the  adoption  of  SFAS  123R,  but  currently 
expects  to  incur  $3.0  to  $4.0  million  in  charges  for  stock  options  granted  in  2006.    In  addition,  in  the  fourth 
quarter of 2004, we recorded a one-time income tax credit of $16.7 million primarily related to the release of our 
previously  recorded  valuation  allowance  against  our  net  operating  loss  carryforwards,  and  as  a  result  our  net 
income  for  the  fourth  quarter  and  year  ended  December  31,  2004  was  significantly  higher  than  in  previous 
periods. As a result of the release of our previously recorded valuation allowance, we expect to record income 
tax  expense for  subsequent periods  at  an  effective  tax  rate  that  approximates  the  statutory  tax rate, which will 
decrease our net income. 

Our  revenues  and  financial  condition  will  be  adversely  affected  if  we  are  not  able  to  attract  and  retain 
clients. Our success and revenues depend on attracting and retaining subscribers to our information services. Our 
subscription-based  information  services  generate  the  largest  portion  of  our  revenues.  However,  we  may  be 
unable to attract new clients in planned expansion markets and our clients in existing markets may decide not to 
add, not to renew or to cancel subscription services. In addition, in order to increase our revenue growth rate, we 
must  continue  to  attract  new  customers,  continue  to  keep  our  cancellation  rate  low  and  continue  to  sell  new 
services  to  our  existing  customers.  We  may  not  be  able  to  continue  to  grow  our  customer  base  as  a  result  of 
several factors, including without limitation: a decision that customers have no need for our services; a decision 
to use alternative services; customers’ and potential customers’ pricing and budgetary constraints; consolidation 
in  the  real  estate  and/or  financial  services  industries;  data  quality;  technical  problems;  or  economic  or 
competitive  pressures.  If  clients  decide  to  cancel  or  not  to  renew  their  agreements,  and  we  do  not  attract  new 
clients or sell new services to our existing clients, then our revenues or our revenue growth rate may decline. 

If our operating costs are higher than we expect, our profitability may be reduced. Many of our expenses, 
particularly personnel costs and occupancy costs, are relatively fixed. As a result, we may not be able to adjust 
spending  quickly  enough  to  offset  any  unexpected  revenue  shortfall  or  increase  in  expenses.  Additionally,  we 
may  experience  higher  than  expected  operating  costs,  including  increased  personnel  costs,  occupancy  costs, 
selling  and  marketing  costs,  investments  in  geographic  expansion,  acquisition  costs,  communications  costs, 
travel  costs,  software  development  costs,  professional  fees  and  other  costs.  If  operating  costs  exceed  our 
expectations  or  cannot  be  adjusted  accordingly,  our  profitability  may  be  reduced  and  our  results  of  operations 
and financial condition will be adversely affected. 

General  economic  conditions  could  increase  our  expenses  and  reduce  our  revenues.  Our  business  and  the 
commercial real estate industry are particularly affected by negative trends in the general economy. The success 
of our business depends on a number of factors relating to general global, national, regional and local economic 
conditions,  including  inflation,  interest  rates,  perceived  and  actual  economic  conditions,  taxation  policies, 
availability  of  credit,  employment  levels,  and  wage  and  salary  levels.  Negative  general  economic  conditions 
could adversely affect our business by reducing our revenues and profitability.  Any significant terrorist attack is 
likely  to  have  a  dampening  effect  on  the  economy  in  general  which  could  negatively  affect  our  financial 
performance and our stock price. In addition, a significant increase in inflation could increase our expenses more 

14

 
 
 
 
 
 
 
 
rapidly  than  expected,  the  effect  of  which  may  not  be  offset  by  corresponding  increases  in  revenue.  If  clients 
choose to cancel our information services as a result of economic conditions, and we do not acquire new clients, 
our revenues may decline and our financial position would be adversely affected. 

A downturn or consolidation in the commercial real estate industry may decrease customer demand for our 
services. A reversal of recent improvements in the commercial real estate industry’s leasing activity, rental rates 
and absorption rates, or renewed downturn in the commercial real estate market may affect our ability to generate 
revenues and may lead to more cancellations by our current or future customers, both of which could cause our 
revenues or our revenue growth rate to decline and reduce our profitability. A depressed commercial real estate 
market  has  a  negative  impact  on  our  core  customer  base,  which  could  decrease  demand  for  our  information 
services.  Also,  companies  in  this  industry  are  consolidating,  often  in  order  to  reduce  expenses.  Consolidation 
may lead to more cancellations of our information services by our customers, reduce the number of our existing 
clients, reduce the size of our target market or increase our clients’ bargaining power, all of which could cause 
our revenues or our revenue growth rate to decline and reduce our profitability. 

Competition  could  render  our  services  uncompetitive.  The  market  for  information  systems  and  services  in 
general is highly competitive and rapidly changing. Our existing competitors, or future competitors,  may have 
greater name  recognition,  larger  customer  bases, better  technology  or  data,  lower prices,  easier  access  to  data, 
greater user traffic or greater financial, technical or marketing resources than we have. Our competitors may be 
able to undertake more effective marketing campaigns, obtain more data, adopt more aggressive pricing policies, 
make  more  attractive  offers  to  potential  employees,  subscribers,  distribution  partners  and  content  providers  or 
may  be  able  to  respond  more  quickly  to  new  or  emerging  technologies  or  changes  in  user  requirements. 
Increased competition could result in lower revenues and higher expenses, which would reduce our profitability. 

If  we  are  not  able  to  obtain  and  maintain  accurate,  comprehensive  or  reliable  data,  we  could  experience 
reduced  demand  for  our  information  services.  Our  success  depends  on  our  clients’  confidence  in  the 
comprehensiveness,  accuracy  and  reliability  of  the  data  we  provide.  The  task  of  establishing  and  maintaining 
accurate  and  reliable  data  is  challenging.  If  our  data,  including  the  data  we  obtain  from  third  parties,  is  not 
current,  accurate,  comprehensive  or  reliable,  we  could  experience  reduced  demand  for  our  services  or  legal 
claims by our customers, which could result in lower revenues and higher expenses. In April 2005, we deployed 
a new company-wide internal research application for our U.S. researchers to use to update our database. Any 
inefficiencies, errors, or technical problems with this new application could reduce the quality of our data, which 
could result in reduced demand for our services, lower revenues and higher costs.  In addition, in July 2005, we 
closed  our  Mason,  Ohio  research  center  in  an  effort  to  reduce  costs  and  improve  the  quality  of  our  research 
operations. If the consolidation of our research operations within our remaining research centers is unsuccessful, 
our data quality may be affected, which could result in reduced demand for our services.   

We  have  experienced  operating  losses  and  our  future  profitability  is  uncertain.  Until  the  third  quarter  of 
2003, we had not recorded an overall operating profit because the investment required for geographic expansion 
and new information services had caused our expenses to exceed our revenues. Our ability to continue to earn a 
profit will largely depend on our ability to manage our growth, including our expansion plans, and to generate 
revenues that exceed our expenses. We generated net income for the years ended December 31, 2003  2004, and 
2005, and our decision to release the valuation allowance on our deferred tax assets was based on our expectation 
of future taxable income from operations; however, we may not be able to sustain or increase profitability on a 
quarterly  or  annual  basis  in  the  future.  We  will  continue  to  evaluate  our  expectation  of  future  taxable  income 
during each quarter, and if we are unable to conclude that it is more likely than not that we will continue to be 
profitable,  then  the  realization  of  our  deferred  tax  assets  could  become  uncertain.  In  such  a  case,  we  may  be 
required to establish a valuation allowance against some or all of our deferred tax assets, which could result in a 
significant charge to our earnings that could adversely affect our net income in the period in which the charge is 
incurred.  In  addition, our  ability  to  continue  to  earn  a  profit,  to  increase  revenues  or  to  control  costs  could  be 
affected by the factors set forth in this section. We may not be able to generate revenues or control expenses to a 
degree sufficient to earn a profit, to increase profits on a quarterly or annual basis, or to sustain or increase our 
future revenue growth and, as a result, the market price of our common stock may decline. 

Litigation  or  government  investigations  in  which  we  become  involved  may  significantly  increase  our 
expenses  and  adversely  affect  our  stock  price.  Currently  and  from  time  to  time,  we  are  a  party  to  various 
lawsuits. Any lawsuits, threatened lawsuits or government investigations in which we are involved could cost us 
a significant amount of time and money to defend, could result in negative publicity, and could adversely affect 

15

 
 
 
 
 
 
 
 
our stock price. In addition, if any claims are determined against us or if a settlement requires us to pay a large 
monetary amount, our profitability could be significantly reduced and our financial position could be adversely 
affected. We cannot assure you that we will have any or sufficient insurance to cover any litigation claims. 

If we are unable to hire qualified persons for, or retain and continue to develop, our sales force, or if our 
sales  force  is  unproductive,  our  revenues  could  be  adversely  affected.  In  order  to  support  revenue  growth,  we 
need to continue to develop, train and retain our sales force. Our ability to build and develop a strong sales force 
may be affected by a number of factors, including: our ability to attract, integrate and motivate sales personnel; 
our  ability  to  effectively  train  our  sales  force;  the  ability  of  our  sales  force  to  sell  an  increased  number  of 
services; our ability to grow and manage effectively an outbound telesales group; the length of time it takes new 
sales  personnel  to  become  productive;  the  competition  we  face  from  other  companies  in  hiring  and  retaining 
sales personnel; and our ability to effectively manage a multi-location sales organization. If we are unable to hire 
qualified  sales  personnel  and  develop  and  retain  the  members  of  our  sales  force,  including  sales  force 
management, or if our sales force is unproductive, our revenues could decline or cease to grow and our expenses 
could increase. 

     Our  stock  price  may  be  negatively  affected  by  fluctuations  in  our  financial  results.  Our  operating  results, 
revenues and expenses may fluctuate with general economic conditions and also for many other reasons, many of 
which are outside of our control, such as: cancellations or non-renewals of our services; competition; our ability 
to control expenses; loss of clients or revenues; technical problems with our services; changes or consolidation in 
the real estate industry; our investments in geographic expansion and to increase coverage in existing markets; 
interest  rate  fluctuations;  the  timing  and  success  of  new  service  introductions  and  enhancements;  successful 
execution  of  our  expansion  plans;  data  quality;  the  development  of  our  sales  force;  managerial  execution; 
employee retention; foreign currency fluctuations; inflation; successful adoption of and training on our services; 
litigation;  acquisitions  of  other  companies  or  assets;  sales,  brand  enhancement  and  marketing  promotional 
activities; client support activities; changes in client budgets; or our investments in other corporate resources. In 
addition,  changes  in  accounting  policies  or  practices  may  affect  our  level  of  net  income,  including  without 
limitation,  changes  requiring  us  to  expense  stock  options.  Fluctuations  in  our  financial  results,  revenues  and 
expenses may cause the market price of our common stock to decline. 

     We may not be able to successfully introduce new or upgraded information services, which could decrease 
our  revenues  and  our  profitability.  Our  future  business  and  financial  success  will  depend  on  our  ability  to 
continue to introduce new and upgraded services into the marketplace. To be successful, we must adapt to rapid 
technological changes by continually enhancing our information services. Developing new services and upgrades 
to  services  imposes  heavy  burdens  on  our  systems  department,  management  and  researchers.  This  process  is 
costly,  and  we  cannot  assure  you  that  we  will  be  able  to  successfully  develop  and  enhance  our  services.  In 
addition, successfully launching and selling a new service puts pressure on our sales and marketing resources. If 
we are unable to develop new or upgraded services, then our customers may choose a competitive service over 
ours and our revenues may decline and our profitability may be reduced. In addition, if we incur significant costs 
in  developing  new  or  upgraded  services,  are  not  successful  in  marketing  and  selling  these  new  services  or 
upgrades, or our customers fail to accept these new services, it could have a material adverse effect on our results 
of operations by decreasing our revenues or our revenue growth rate and by reducing our profitability. 

     Fluctuating  foreign  currencies  may  negatively  impact  our  business,  results  of  operations  and  financial 
condition. Due to our acquisition of FOCUS Information and Scottish Property Network (“SPN”), a portion of 
our business is denominated in the British Pound and as a result, fluctuations in foreign currencies may have an 
impact  on  our  business,  results  of  operations  and  financial  condition.  Currencies  may  be  affected  by  internal 
factors,  and  external  developments  in  other  countries,  all of which  can have  an  adverse  impact  on  a  country’s 
currency.  Currently,  we  do  not  have  any  hedging  transactions  to  reduce  our  exposure  to  exchange  rate 
fluctuations.  We  may  seek  to  enter  into hedging  transactions  in  the  future but  we  may  be  unable  to  enter  into 
these transactions successfully, on acceptable terms or at all. We cannot predict whether we will incur foreign 
exchange  losses  in  the  future.  Further,  significant  foreign  exchange  fluctuations  resulting  in  a  decline  in  the 
British Pound may decrease the value of our foreign assets, as well as decrease our revenues and earnings from 
our foreign subsidiaries. 

If  we  are  unable  to  enforce  or  defend  our  ownership  and  use  of  intellectual  property,  our  business, 
competitive position and operating results could be harmed. The success of our business depends in large part on 
the  intellectual  property  involved  in  our  methodologies,  database,  services  and  software.  We  rely  on  a 

16

 
 
 
 
 
 
 
 
combination  of  trade  secret,  patent,  copyright  and  other  laws,  nondisclosure  and  noncompetition  provisions, 
license agreements and other contractual provisions and technical measures to protect our intellectual property 
rights.  However,  current  law  may  not  provide  for  adequate  protection  of  our  databases  and  the  actual  data.  In 
addition,  legal  standards  relating  to  the  validity,  enforceability  and  scope  of  protection  of  proprietary  rights  in 
Internet-related businesses are uncertain and evolving, and we cannot assure you of the future viability or value 
of  any  of  our  proprietary  rights.  Our  business  could  be  significantly  harmed  if  we  are  not  able  to  protect  our 
content  and  our other  intellectual  property. The  same  would  be  true  if  a court  found  that  our services  infringe 
other persons’ intellectual property rights. Any intellectual property lawsuits or threatened lawsuits in which we 
are involved, either as a plaintiff or as a defendant, could cost us a significant amount of time and money and 
distract management’s attention from operating our business. In addition, if we do not prevail on any intellectual 
property claims, this could result in a change to our methodology or information services and could reduce our 
profitability. 

     If  we are not  able  to  successfully  identify  and  integrate  acquisitions,  our business operations and  financial 
condition could be adversely affected. We have expanded our markets and services in part through acquisitions 
of complementary businesses, services, databases and technologies, and expect to continue to do so in the future. 
Our  strategy  to  acquire  complementary  companies  or  assets  depends  on  our  ability  to  identify,  and  the 
availability  of,  suitable  acquisition  candidates.  In  addition,  acquisitions  involve  numerous  risks,  including 
managing the integration of personnel and products; managing geographically remote operations, such as SPN in 
Scotland; the diversion of  management’s attention from other business concerns; the inherent risks in entering 
markets  and  sectors  in  which  we  have  either  limited  or  no  direct  experience;  and  the  potential  loss  of  key 
employees or clients of the acquired companies. We may not successfully integrate any acquired businesses or 
assets and may not achieve anticipated benefits of any acquisition. Future acquisitions that we may pursue could 
result  in  dilutive  issuances  of  equity  securities,  the  incurrence  of  debt,  one-time  write-offs  of  goodwill  and 
substantial amortization expenses of other intangible assets. 

     Our business depends on retaining and attracting highly capable management and operating personnel. Our 
success depends in large part on our ability to retain and attract management and operating personnel, including 
our  President  and  Chief  Executive  Officer,  Andrew  Florance,  and  our  other  officers  and  key  employees.  Our 
business  requires  highly  skilled  technical,  sales,  management,  web-development,  marketing  and  research 
personnel, who are in high demand and are often subject to competing offers. To retain and attract key personnel, 
we use various measures, including employment agreements, awards under a stock incentive plan and incentive 
bonuses  for  key  executive  officers.  These  measures  may  not  be  enough  to  retain  and  attract  the  personnel  we 
need or to offset the impact on our business of the loss of the services of Mr. Florance or other key officers or 
employees. 

     International  expansion  may  result  in  new  business  risks  which  may  reduce  our  profitability.  Our 
international  expansion  could  subject  us  to  new  business  risks,  including:  adapting  to  the  differing  business 
practices  and  laws  in  foreign  countries;  difficulties  in  managing  foreign  operations;  limited  protection  for 
intellectual property rights in some countries; difficulty in collecting accounts receivable and longer collection 
periods; costs of enforcing contractual obligations; impact of recessions in economies outside the United States; 
currency  exchange  rate  fluctuations;  and  potentially  adverse  tax  consequences.  In  addition,  international 
expansion  imposes  additional  burdens  on  our  executive  and  administrative  personnel,  systems  development, 
research  and  sales  departments,  and  general  managerial  resources.  If  we  are  not  able  to  manage  our  growth 
successfully,  we  may  incur  higher  expenses  and  our  profitability  may  be  reduced.  Finally,  the  investment 
required for international expansion could exceed the profit generated from such expansion, which would reduce 
our profitability and adversely affect our financial condition. 

     We  may  be  subject  to  legal  liability  for  displaying  or  distributing  information.  Because  the  content  in  our 
database  is  distributed  to  others,  we  may  be  subject  to  claims  for  defamation,  negligence  or  copyright  or 
trademark  infringement  or  claims  based  on  other  theories.  We  could  also  be  subject  to  claims  based  upon  the 
content  that  is  accessible  from  our  web  site  through  links  to  other  web  sites  or  information  on  our  web  site 
supplied by third parties. Even if these claims do not result in liability to us, we could incur significant costs in 
investigating and defending against any claims. Our potential liability for information distributed by us to others 
could require us to implement measures to reduce our exposure to such liability, which may require us to expend 
substantial resources and limit the attractiveness of our information services to users. 

17

 
 
 
 
 
 
 
 
     Market volatility may have an adverse effect on our stock price. The trading price of our common stock has 
fluctuated  widely  in  the  past,  and  we  expect  that  it  will  continue  to  fluctuate  in  the  future.  The  price  could 
fluctuate  widely  based  on  numerous  factors,  including:  quarter-to-quarter  variations  in  our  operating  results; 
changes  in  analysts’  estimates  of  our  earnings;  announcements  by  us  or  our  competitors  of  technological 
innovations or new services; general conditions in the commercial real estate industry; developments or disputes 
concerning copyrights or proprietary rights; regulatory developments; and economic or other factors. In addition, 
in recent years, the stock market in general, and the shares of Internet-related and other technology companies in 
particular, have experienced extreme price fluctuations. This volatility has had a substantial effect on the market 
prices of securities issued by many companies for reasons unrelated to the operating performance of the specific 
companies. 

Item 1B. Unresolved Staff Comments 

None. 

Item 2. Properties 

Our  corporate  headquarters  are  located  in  Bethesda,  Maryland,  where  we  occupy  approximately  73,500 
square feet of office space. Our main lease for our Bethesda, Maryland headquarters expires on March 14, 2010.  

In  addition  to  our  Bethesda,  Maryland  facility,  our  research  operations  are  principally  run  out  of  leased 
spaces in San Diego, California; Columbia, Maryland; London, England; and Paisley, Scotland. Additionally, we 
lease office space in a variety of other metropolitan areas, which generally house our field sales offices. These 
locations include, without limitation, the following: New York; Los Angeles; Chicago; San Francisco; Boston; 
Manchester, England; Orange County, California; Philadelphia; Houston; Atlanta; Phoenix; Detroit; Pittsburgh; 
Iselin,  New  Jersey;  Miami;  Denver;  Dallas;  Kansas  City;  Cleveland;  Tustin,  California;  Tampa;  Orlando; 
Indianapolis; Raleigh/Durham; St. Louis; Columbus, Ohio; Portland, Oregon; and Stamford, Connecticut.   

We believe these facilities are suitable and appropriately support our business needs. 

Item 3. Legal Proceedings 

Currently, and from time to time, we are involved in litigation incidental to the conduct of our business. We 
are not a party to any lawsuit or proceeding that, in the opinion of our management based on consultations with 
legal counsel, is likely to have a material adverse effect on our financial position or results of operations. 

Item 4. Submission of Matters to a Vote of Security Holders 

We did not submit any matters to a vote of our security holders during the quarter ended December 31, 2005. 

18

 
 
 
 
 
 
 
 
 
 
 
 
 
 
PART II 

Item 5. Market for the Registrant’s Common Stock, Related Stockholder Matters and Issuer Purchases of 

Equity Securities  

Price Range of Common Stock. Our common stock is traded on the Nasdaq Stock Market® under the symbol 
“CSGP.” The following table sets forth, for the periods indicated, the high and low daily closing prices per share 
of our common stock, as reported by the Nasdaq Stock Market®. 

Year Ended December 31, 2004 
First Quarter 
Second Quarter 
Third Quarter 
Fourth Quarter 

Year Ended December 31, 2005 
First Quarter 
Second Quarter 
Third Quarter 
Fourth Quarter 

  High 

  Low 

$  42.22  $  35.83 
$  46.19  $  37.09 
$  49.19  $  38.05 
$  48.75  $  39.65 

$  46.21  $  36.83 
$  45.31  $  33.72 
$  49.81  $  44.81 
$  49.19  $  43.17 

As of February 1, 2006, there were 125 holders of record of our common stock. On December 30, 2005, the 

last sale price reported on the Nasdaq Stock Market® for our common stock was $43.17  per share. 

Dividend  Policy.  We  have  never  declared  or  paid  any  dividends  on  our  common  stock.  Any  future 
determination  to  pay  dividends  will  be  at  the  discretion  of  our  Board  of  Directors,  subject  to  applicable 
limitations  under  Delaware  law,  and  will  be  dependent upon  our  results  of  operations,  financial  condition  and 
other factors deemed relevant by our Board of Directors. The Company does not anticipate paying any dividends 
on  its  common  stock  during  the  foreseeable  future,  but  intends  to  retain  any  earnings  for  future  growth  of  its 
business. 

Recent  Issues  of  Unregistered  Securities.  We  did  not  issue  any  unregistered  securities  during  the  quarter 

ended December 31, 2005. 

Issuer  Purchases  of  Equity  Securities.    Neither  the  Company  nor  any  “affiliated  purchaser”  (as  defined  in 
Rule  10b-18  of  the  Securities  Exchange  Act  of  1934)  purchased  any  shares  of  any  registered  securities  of  the 
Company during the fourth quarter of 2005. 

19

 
 
 
 
 
 
  
  
  
 
  
 
 
 
 
 
   
 
 
 
 
 
   
 
 
 
 
 
Item 6.  Selected Consolidated Financial and Operating Data 

Selected Consolidated Financial and Operating Data 
(in thousands, except per share data and other operating data) 

The following table provides selected consolidated financial and other operating data for the five years ended 
December  31, 2005.  The  Consolidated  Statement  of  Operations  Data  shown  below for  each  of  the  three  years 
ended December 31, 2003, 2004, and 2005 and the Consolidated Balance Sheet Data as of December 31, 2004 
and  2005  are  derived  from  audited  consolidated  financial  statements  that  are  included  in  this  report.  The 
Consolidated Statement  of  Operations  Data  for  each of the  years  ended  December  31,  2001  and 2002  and  the 
Consolidated  Balance  Sheet  Data  as  of  December  31,  2001,  2002,  and  2003  shown  below  are  derived  from 
audited consolidated financial statements for those years that are not included in this report. 

Consolidated Statement of Operations Data: 
Revenues.................................................................. $
Cost of revenues ......................................................  
Gross margin............................................................  
Operating expenses ..................................................  
Income (loss) from operations .................................  
Other income, net.....................................................  
Income (loss) before income taxes...........................  
Income tax expense (benefit) ...................................  
Net income (loss) ..................................................... $
Net income (loss) per share − basic ......................... $
Net income (loss) per share − diluted....................... $
Weighted average shares outstanding − basic..........  
Weighted average shares outstanding − diluted .......  

2001 

72,513   $
30,316  
42,197  
64,923  
(22,726)  
1,578  
(21,148)  
(987)  
(20,161)   $

(1.29)   $  

  $

$

  $ 

2002 
79,363
28,012
51,351
56,894
(5,543)
759
(4,784)

Fiscal Year Ended December 31, 
2003 
2004 
112,085 
95,105 
35,384 
30,742 
76,701 
64,363 
69,955 
64,361 
6,746 
2 
1,314 
380 
8,060 
382 
(16,925)  
282 
24,985 
100 
     1.38 
$           0.01 

⎯  
(4,784) $
(0.30)

  $ 
  $   

  $
  $  

2005 
134,338 
44,286 
90,052 
82,710 
7,342 
3,455 
10,797 
4,340 
6,457 
0.35 

(1.29)   $         (0.30) $           0.01 

  $   

1.33 

  $  

0.34 

15,636  

15,636  

15,759

15,759

16,202 

16,674 

18,165 

18,827 

18,453 

19,007 

Consolidated Balance Sheet Data: 
Cash, cash equivalents, cash held for acquisition 

2001 

2002 

As of December 31, 
2003 

2004 

2005 

and short-term investments ................................
$
Working capital .......................................................  
Total assets ..............................................................  
Total liabilities .........................................................  
Stockholders’ equity ................................................  

$

42,002
33,315  
123,646  
15,627  
108,019  

43,530
36,993
118,907
14,890
104,017

$

97,449 
88,207 
183,900 
15,531 
168,369 

$ 

$

117,069 
107,875   
232,691   
21,747   
210,944   

134,185 
124,501 
248,059 
23,263 
224,796 

Other Operating Data: 
Markets covered by database ...................................  
Number of subscription client sites..........................  
Billions of square feet in U.S. database ...................  
Total properties in database .....................................  
Images in database ...................................................  

2001 

50   
6,356   
23.0   
  950,000   
 1,300,000   

2002 

50 
6,907 
25.0 
 1,033,000 
 1,500,000 

As of December 31, 
2003 

51 
8,582 
27.7 
 1,521,000 
 1,805,000 

2004 

58 
9,489 
30.4 
 1,622,000 
 2,255,000 

2005 
            68 
     11,464 
         35.5 
  1,817,000 
  3,234,000 

20

 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
 
 
 
 
   
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
 
 
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations  

The  following  Management’s  Discussion  and  Analysis  of  Financial  Condition  and  Results  of  Operations 
contains “forward-looking statements,” including statements about our beliefs and expectations. There are many 
risks and uncertainties  that  could  cause  actual  results  to differ  materially  from  those discussed  in  the  forward-
looking statements. Potential factors that could cause actual results to differ materially from those discussed in 
any forward-looking statements include, but are not limited to, those stated above in Item 1A. under the headings 
“Risk Factors ⎯ Cautionary Statement Concerning Forward-Looking Statements” and “⎯Risk Factors,” as well 
as those described from time to time in our filings with the Securities and Exchange Commission. 

All  forward-looking  statements  are  based  on  information  available  to  us  on  the  date  of  this  filing,  and  we 
assume no obligation to update such statements. The following discussion should be read in conjunction with our 
Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other filings 
with the Securities and Exchange Commission and the consolidated financial statements and related notes in this 
Annual Report on Form 10-K. 

Overview 

CoStar  is  the  leading  provider  of  information  services  to  the  commercial  real  estate  industry  in  the  United 
States and the United Kingdom based on the fact that we offer the most comprehensive commercial real estate 
database available, have the largest research department in the industry, provide more information services than 
any of our competitors and believe we generate more revenues than any of our competitors. We have created a 
standardized  information  platform  where  the  members  of  the  commercial  real  estate  and  related  business 
community  can  continuously  interact  and  facilitate  transactions  by  efficiently  exchanging  accurate  and 
standardized  commercial  real  estate  information.  Our  integrated  suite  of  online  service  offerings  includes 
information about space available for lease, comparable sales information, tenant information, information about 
properties for sale, information for clients’ web sites, information about industry professionals and their business 
relationships, analytic information, data integration, property marketing and industry news. 

We  completed  our  initial  public  offering  in  July  1998  and  received  net  proceeds  of  approximately  $22.7 
million.  We  used  those  net  proceeds  to  fund  the  geographic  and  service  expansion  of  our  business,  including 
three strategic acquisitions, and to expand our sales and marketing organization. In May 1999, we completed a 
follow-on public offering and received net proceeds of approximately $97.4 million. We used a portion of those 
net proceeds to fund the acquisitions of COMPS.COM, Inc. (“Comps”) and Property Intelligence plc (“Property 
Intelligence”).    In  November  2003,  we  completed  an  additional  follow-on  public  offering  and  received  net 
proceeds  of  approximately  $53.5  million.    We  expect  to  use  the  remainder  of  the  proceeds  from  these  public 
offerings  for  development  and  distribution  of  new  services,  expansion  of  existing  services  across  our  current 
markets, geographic expansion in the U.S. and international markets, strategic acquisitions, working capital and 
general corporate purposes. 

From  1994  through  the  beginning  of  2003,  we  expanded  the  geographical  coverage  of  our  existing 
information  services  and  developed  new  information  services.  In  addition  to  internal  growth,  this  expansion 
included the acquisitions of Chicago ReSource, Inc. in Chicago in 1996 and New Market Systems, Inc. in San 
Francisco in 1997. In August 1998, we expanded into the Houston region through the acquisition of Houston-
based  real  estate  information  provider  C  Data  Services,  Inc.  In  January  1999,  we  expanded  further  into  the 
Midwest and Florida by acquiring LeaseTrend, Inc. and into Atlanta and Dallas/Fort Worth by acquiring Jamison 
Research,  Inc.    In  February  2000,  we  acquired  Comps,  a  San  Diego-based  provider  of  commercial  real  estate 
information. In November 2000, we acquired First Image Technologies, Inc. (“First Image”). In September 2002, 
we expanded further into Portland, Oregon through the acquisition of certain assets of Napier Realty Advisors 
d/b/a  REAL-NET  (“REAL-NET”).  In  January  2003,  we  established  a  base  in  the  United  Kingdom  with  our 
acquisition  of  London-based  Property  Intelligence.  In  May  2004,  we  expanded  into  Tennessee  through  the 
acquisition  of  Peer  Market  Research,  Inc.  (“PeerMark”),  and  in  June  2004,  we  extended  our  coverage  of  the 
United  Kingdom  through  the  acquisition  of  Scottish  Property  Network  (“SPN”).    In  September  2004,  we 
strengthened  our  position  in  Denver,  Colorado  through  the  acquisition  of  substantially  all  of  the  assets  of 
RealComp, Inc., a local comparable sales information provider.  In January 2005, we acquired National Research 
Bureau  (“NRB”),  a  leading  provider  of  U.S.  shopping  center  information.    The  more  recent  acquisitions  are 
discussed later in this section. 

21

 
 
 
 
 
 
 
 
 
 
Since our inception, the growth of our business has required substantial investments for the expansion of our 
services and the establishment of operating regions throughout the United States, which resulted in substantial 
net losses on an overall basis until 2003. Throughout 1999 and 2000, we experienced a rapid expansion in the 
number of services that we offered and the number of regions in which we operated. By the beginning of 2001, 
we had substantially established a national platform of service offerings in 50 U.S. metropolitan markets. From 
2001 through 2003, we focused on continuing to grow revenue while controlling and reducing costs, in order to 
reduce operating losses and become profitable in accordance with accounting principles generally accepted in the 
United  States (“GAAP”).   Our net  income  increased from  $100,000  for the  year  ended  December  31,  2003  to 
$25.0  million  for  the  year  ended  December  31,  2004.    Net  income  in  2004  included  a  one-time  income  tax 
benefit of $16.7 million, which was the result of the release of a substantial portion of our valuation allowance on 
our deferred tax asset, related to our net operating loss carryforwards.  In addition, we increased EBITDA (net 
income before interest, taxes, depreciation and amortization) by $6.6 million from $13.2 million in 2003 to $19.8 
million in 2004.  Our use of non-GAAP financial measures is discussed later in this section. 

Prior to 2003, our calculations of weighted-average outstanding shares for basic and diluted net loss per share 
were identical because stock options that would have had an anti-dilutive effect on the calculation were properly 
excluded from the calculation.  We achieved net income for the years ended December 31, 2003, 2004, and 2005 
and as a result our calculation of weighted-average outstanding shares for diluted net income per share included 
the effect of any dilutive stock options, which are any outstanding stock options that have an exercise price lower 
than  the  average  market  price  of  our  common  stock  for  the  period  presented.    We  expect  that  our  diluted  net 
income per share will be lower than our basic net income per share for any future periods in which we report net 
income, due to the dilutive effect of outstanding stock options.   

Our current expansion plan began in 2004 and included entering 21 new metropolitan markets throughout the 
United States as well as expanding the geographical boundaries of many of our existing U.S. and U.K. markets 
during 2005 and 2006.  As of February 21, 2006 our expansion into the 21 new markets is complete. In addition, 
in  January  2005,  we  acquired  NRB  and  announced  the  launch  of  a  major  expansion  effort  into  real  estate 
information for retail properties.  Our current retail expansion plan has caused and will continue to cause our cost 
structure to escalate in advance of the revenues that we expect to generate from these new markets and services, 
reducing our earnings growth. 

We expect 2006 revenue to grow over 2005 revenue as a result of further penetration of our services in our 
potential  customer  base  across  our  platform,  as  well  as  successful  cross  selling  of  our  services  to  our  existing 
customer  base,  and  continued  geographic  expansion.  We  expect  EBITDA  for  our  existing  core  platform  to 
continue  to  grow  principally  due  to  growth  in  revenue  and  we  expect  overall  2006  EBITDA  to  increase  from 
2005  EBITDA  including  stock  option  compensation  expense  related  to  the  adoption  of  SFAS  No.  123R.  The 
2005 EBITDA did not include stock option compensation expense.  

In  addition  to  our  current  planned  retail  expansion,  we  may  continue  further  geographic  expansion  in  the 
United  States,  we  may  seek  additional  international  geographic  expansion  or  we  may  seek  to  expand  our 
services.  Any  future  significant  expansion  could  reduce  our  profitability  and  significantly  increase  our  capital 
expenditures.    Therefore,  while  we  expect  current  service  offerings  in  existing  markets  to  remain  generally 
profitable and provide substantial funding for our overall business, it is possible that further overall expansion 
could cause us to generate losses and negative cash flow from operations in the future.  

 Our  subscription-based  information  services,  consisting  primarily  of  CoStar  Property  Professional,  CoStar 
Tenant,  CoStar  COMPS  Professional and  FOCUS  services,  currently  generate  approximately  95%  of  our  total 
revenues. Our contracts for our subscription-based information services typically have a minimum term of one 
year and renew automatically. Upon renewal, many of the subscription contract rates may increase in accordance 
with  contract  provisions  or  as  a  result  of  contract  renegotiations.  To  encourage  clients  to  use  our  services 
regularly, we generally charge a fixed monthly amount for our subscription-based services rather than fees based 
on actual system usage. Contract rates are based on the number of sites, number of users, organization size, the 
client’s business focus and the number of services to which a client subscribes. Our subscription clients generally 
pay contract fees on a monthly basis, but in some cases may pay us on a quarterly or annual basis. We recognize 
this revenue on a straight-line basis over the life of the contract. Annual and quarterly advance payments result in 
deferred revenue, substantially reducing the working capital requirements generated by accounts receivable. 

For the years ended December 31, 2004 and 2005, our contract renewal rate was over 90%. 

22

 
 
 
 
 
 
 
 
 
Application of Critical Accounting Policies and Estimates 

The  preparation  of  financial  statements  and  related  disclosures  in  conformity  with  accounting  principles 
generally accepted in the United States requires management to make estimates and assumptions that affect the 
reported  amounts  of  assets  and  liabilities,  the  disclosure  of  contingent  assets  and  liabilities  at  the  date  of  the 
financial  statements  and  revenues  and  expenses  during  the  period  reported.  The  following  accounting  policies 
involve  a  “critical  accounting  estimate”  because  they  are  particularly  dependent  on  estimates  and  assumptions 
made by management about matters that are highly uncertain at the time the accounting estimates are made. In 
addition,  while  we  have  used  our  best  estimates  based  on  facts  and  circumstances  available  to  us  at  the  time, 
different estimates reasonably could have been used in the current period. Changes in the accounting estimates 
we  used  are  reasonably  likely  to  occur  from  period  to  period  which  may  have  a  material  impact  on  the 
presentation  of  our  financial  condition  and  results  of  operations.  We  review  these  estimates  and  assumptions 
periodically and reflect the effects of revisions in the period that they are determined to be necessary. 

Valuation of long-lived and intangible assets and goodwill 

We  assess  the  impairment  of  long-lived  assets,  identifiable  intangibles  and  goodwill  whenever  events  or 
changes in circumstances indicate that the carrying value may not be recoverable. Factors we consider important 
that could trigger an impairment review include the following: 

•  Significant underperformance relative to historical or projected future operating results;  
•  Significant  changes  in  the  manner  of  our  use  of  the  acquired  assets  or  the  strategy  for  our  overall 

business; 

•  Significant negative industry or economic trends; or  
•  Significant decline in our market capitalization relative to net book value for a sustained period.  

When  we  determine  that  the  carrying  value  of  long-lived  and  identifiable  intangible  assets  may  not  be 
recovered based upon the existence of one or more of the above indicators, we measure any impairment based on 
a  projected  discounted  cash  flow  method  using  a  discount  rate  determined  by  our  management  to  be 
commensurate with the risk inherent in our current business model. 

Goodwill and identifiable intangible assets not subject to amortization are tested annually on October 1st of 
each year for impairment and are tested for impairment more frequently based upon the existence of one or more 
of  the  above  indicators.    We  measure  any  impairment  loss  to  the  extent  that  the  carrying  amount  of  the  asset 
exceeds its fair value. 

Accounting for income taxes 

As  part  of  the  process  of  preparing  our  consolidated  financial  statements,  we  are  required  to  estimate  our 
income  taxes  in  each  of  the  jurisdictions  in  which  we  operate.  This  process  requires  us  to  estimate  our  actual 
current  tax  exposure  and  assess  the  temporary  differences  resulting  from  differing  treatment  of  items,  such  as 
deferred revenue or deductibility of certain intangible assets, for tax and accounting purposes. These differences 
result in deferred tax assets and liabilities, which are included within our consolidated balance sheet. We must 
then also assess the likelihood that our deferred tax assets will be recovered from future taxable income, and, to 
the extent we believe that it is more likely than not that some portion or all of our deferred tax assets will not be 
realized, we must establish a valuation allowance.  To the extent we establish a valuation allowance or change 
the allowance in a period, we must reflect the corresponding increase or decrease within the tax provision in the 
statement of operations.  

As  of  the  fourth  quarter  of  2004,  we  determined  that  it  was  more  likely  than  not  that  we  would  generate 
taxable  income  from  operations  and  be  able  to  realize  tax  benefits  arising  from  use  of  our  net  operating  loss 
carryforwards to reduce the income tax we will owe on this taxable income. Prior to the fourth quarter of 2004, 
we recorded a valuation allowance on the deferred tax assets associated with these future tax benefits because we 
were not certain we would generate taxable income in the future. The release of the valuation allowance in the 
fourth quarter resulted in a tax benefit of approximately $26.2 million. This included an income tax benefit of 
approximately $16.7 million that was recognized in our results from operations. We also recognized a tax benefit 
of approximately $9.5 million as additional paid-in capital for our net operating loss carryforwards attributable to 

23

 
 
 
 
 
 
 
 
 
 
 
 
 
tax deductions for stock options. As of December 31, 2005, we continued to maintain a valuation allowance of 
approximately $687,000 for certain state net operating loss carryforwards.   At December 31, 2005, the Company 
has  net  operating  loss  carryforwards  for  federal  income  tax  purposes  of  approximately  $63.0  million,  which 
expire, if unused, from the year 2013 through the year 2023. 

Our decision to release the valuation allowance on our deferred tax asset was based on our expectation that 
we will recognize taxable income from operations in the future, which will enable us to use our net operating loss 
carryforwards. We believe our expectation that we will recognize taxable income in the future is supported by 
our  increase  in  net  earnings  over  the  last  three  years, our  revenue  growth,  our  renewal  rates  with  our  existing 
customers, and our business model, which permits some control over future costs. We will continue to evaluate 
our expectation of future taxable income during each quarter. If we are unable to conclude that it is more likely 
than  not  that  we  will  realize  the  future  tax  benefits  associated  with  our  deferred  tax  assets,  then  we  may  be 
required to establish a valuation allowance against some or all of the deferred tax assets. 

For  the  foreseeable  future,  we  expect  to  record  income  tax  expense  on  our  results  from  operations  at  an 
effective rate of approximately 42.5% to 43.5%. For the next several years, however, we expect the majority of 
our taxable income to be offset by our net operating loss carryforwards. As a result, we expect our cash payments 
for taxes to be limited primarily to federal alternative minimum taxes and to state income taxes in certain states. 

Accounting for employee stock options 

As  permitted  under  Statement  of  Financial  Accounting  Standard  No.  123,  “Accounting  for  Stock-Based 
Compensation,”  we  currently  account  for  employee  stock  options  in  accordance  with  Accounting  Principles 
Board Opinion No. 25 (“APB No. 25”), “Accounting for Stock Issued to Employees.” Under APB No. 25, we 
recognize compensation cost based on the intrinsic value of the equity instrument awarded as determined at the 
measurement  date.  We  disclose  the  required  pro  forma  information  in  our  notes  to  consolidated  financial 
statements as if the fair value method prescribed by SFAS No. 123 had been applied.  

Effective  for  the  fiscal  quarters  beginning  after  December  31,  2005,  pursuant  to  SFAS  No.  123R,  “Share-
Based Payment”, the Company will be required to measure the cost of employee services received in exchange 
for an award of equity instruments based on the grant-date fair value of the award and recognize that cost over 
the period during which an employee is required to provide service in exchange for the award. The Company is 
continuing  to  assess  the  impact  of  the  adoption  of  SFAS  No.  123R  in  2005,  however,  the  Company  currently 
expects to incur approximately $3.0 to $4.0 million for stock option compensation expense in 2006.   

In 2005, we issued restricted stock, instead of stock options, to our senior officers and employees, as a result 
of which we recorded additional compensation expense on our consolidated statement of operations.  We plan to 
continue the use of alternative stock-based compensation for our senior officers, directors and employees, which 
may  include  among  other  things,  restricted  stock  grants,  which  typically  will  require  us  to  record  additional 
compensation  expense  on  our  consolidated  statement  of  operations  and  reduce  our  net  income,  the  Company 
currently expects to incur approximately $2.0 million for restricted stock compensation expense in 2006. 

Non-GAAP Financial Measures 

 We  prepare  and  publicly  release  quarterly  unaudited  financial  statements  prepared  in  accordance  with 
GAAP. We also disclose and discuss certain non-GAAP financial measures in our public releases. Currently, the 
non-GAAP financial measure that we disclose is EBITDA, which is our net income (loss) before interest, income 
taxes,  depreciation  and  amortization.  We  disclose  EBITDA  in  our  earnings  releases,  investor  conference  calls 
and filings with the Securities and Exchange Commission. The non-GAAP financial measures that we use may 
not be comparable to similarly titled measures reported by other companies. Also, in the future, we may disclose 
different non-GAAP financial measures in order to help our investors more meaningfully evaluate and compare 
our future results of operations to our previously reported results of operations. 

We  view  EBITDA  as  an  operating  performance  measure  and  as  such  we  believe  that  the  GAAP  financial 
measure most directly comparable to it is net income (loss). In calculating EBITDA we exclude from net income 
(loss)  the  financial  items  that  we  believe  should  be  separately  identified  to  provide  additional  analysis  of  the 
financial components of the day-to-day operation of our business. We have outlined below the type and scope of 
these  exclusions  and  the  material  limitations  on  the  use  of  these  non-GAAP  financial  measures  as  a  result  of 

24

 
 
 
 
 
 
 
 
 
 
 
 
these  exclusions.  EBITDA  is  not  a  measurement  of  financial  performance  under  GAAP  and  should  not  be 
considered as a measure of liquidity, as an alternative to net income (loss) or as an indicator of any other measure 
of performance derived in accordance with GAAP. Investors and potential investors in our securities should not 
rely on EBITDA as a substitute for any GAAP financial measure, including net income (loss). In addition, we 
urge investors and potential investors in our securities to carefully review the reconciliation of EBITDA to net 
income  (loss)  set  forth  below,  in  our  earnings  releases  and  in  other  filings  with  the  Securities  and  Exchange 
Commission and to carefully review the GAAP financial information included as part of our Quarterly Reports 
on  Form 10-Q  and  our  Annual  Reports  on  Form 10-K  that  are  filed  with  the  Securities  and  Exchange 
Commission, as well as our quarterly earnings releases, and compare the GAAP financial information with our 
EBITDA. 

EBITDA is used by management to internally measure our operating and management performance and by 
investors  as  a  supplemental  financial  measure  to  evaluate  the  performance  of  our  business  that,  when  viewed 
with our GAAP results and the accompanying reconciliation, we believe provides additional information that is 
useful  to  gain  an  understanding  of  the  factors  and  trends  affecting  our  business.  We  have  spent  more  than 
18 years  building  our  database  of  commercial  real  estate  information  and  expanding  our  markets  and  services 
partially  through  acquisitions  of  complimentary  businesses.  Due  to  the  expansion  of  our  information  services, 
which  included  acquisitions,  our  net  income  (loss)  has  included  significant  charges  for  purchase  amortization, 
depreciation and other amortization. EBITDA excludes these charges and provides meaningful information about 
the operating performance of our business, apart from charges for purchase amortization, depreciation and other 
amortization.  We  believe  the  disclosure  of  EBITDA  helps  investors  meaningfully  evaluate  and  compare  our 
performance  from  quarter  to  quarter  and  from  year  to  year.  We  also  believe  EBITDA  is  a  measure  of  our 
ongoing operating performance because the isolation of non-cash charges, such as amortization and depreciation, 
and  non-operating  items,  such  as  interest  and  income  taxes,  provides  additional  information  about  our  cost 
structure, and, over time, helps track our operating progress. In addition, investors, securities analysts and others 
have regularly relied on EBITDA to provide a financial measure by which to compare our operating performance 
against that of other companies in our industry.   

Set forth below are descriptions of the financial items that have been excluded from our net income (loss) to 
calculate  EBITDA  and  the  material  limitations  associated  with  using  this  non-GAAP  financial  measure  as 
compared to net income (loss): 

•  Purchase amortization in cost of revenues may be useful for investors to consider because it represents 
the use of our acquired database technology, which is one of the sources of information for our database 
of commercial real estate information. We do not believe these charges necessarily reflect the current 
and ongoing cash charges related to our operating cost structure. 

•  Purchase  amortization  in  operating  expenses  may  be  useful  for  investors  to  consider  because  it 
represents  the  estimated  attrition  of  our  acquired  customer  base  and  the  diminishing  value  of  any 
acquired tradenames. We do not believe these charges necessarily reflect the current and ongoing cash 
charges related to our operating cost structure. 

•  Depreciation  and  other  amortization  may  be  useful  for  investors  to  consider  because  they  generally 
represent the wear and tear on our property and equipment used in our operations. We do not believe 
these  charges  necessarily  reflect  the  current  and  ongoing  cash  charges  related  to  our  operating  cost 
structure. 

•  The amount of net interest income we generate may be useful for investors to consider and may result in 
current cash inflows or outflows. However, we do not consider the amount of net interest income to be a 
representative component of the day-to-day operating performance of our business. 

• 

Income tax expense (benefit) may be useful for investors to consider because it generally represents the 
taxes which may be payable for the period and the change in deferred income taxes during the period 
and may reduce the amount of funds otherwise available for use in our business.  However, we do not 
consider the amount of income tax expense (benefit) to be a representative component of the day-to-day 
operating performance of our business.   

25

 
 
 
 
 
 
 
 
 
 
 
Management  compensates  for  the  above-described  limitations  of  using  non-GAAP  measures  by  only  using  a 
non-GAAP measure to supplement our GAAP results and to provide additional information that is useful to gain 
an understanding of the factors and trends affecting our business. 

The  following  table  shows  our  EBITDA  reconciled  to  our  net  income  and  our  cash  flows  from  operating, 

investing and financing activities for the indicated periods (in thousands of dollars): 

100 
Net income ....................................................................... $ 
2,777 
Purchase amortization in cost of revenues .......................
4,487 
Purchase amortization in operating expenses...................
5,907 
Depreciation and other amortization ................................
(381) 
Interest income, net ..........................................................
Income tax expense (benefit) ...........................................
282 
EBITDA ........................................................................... $  13,172 

2003 

$ 

$ 

2005 

Fiscal Year Ended December 31, 
2004 
24,985 
2,453 
4,351 
6,206 
(1,314) 
(16,925) 
19,756 

6,457 
1,250 
4,469 
5,995 
(3,455) 
4,340 
$  19,056 

$ 

Cash flows provided by (used in) 

Operating activities ..................................................... $  13,550 
(65,521) 
Investing activities ......................................................
61,759 
Financing activities .....................................................

$ 

24,723 
(29,946) 
6,297 

$  22,919 
(38,732) 
7,412 

Our 2005 EBITDA included a restructuring charge of approximately $2.2 million incurred in connection with 
the  closing  of  our  research  center  in  Mason,  Ohio.    The  restructuring  charge  included  amounts  for  wages, 
severance, occupancy and other costs.  We did not incur any restructuring charges in 2004 or 2003. 

Consolidated Results of Operations 

The  following  table  provides  our  selected  consolidated  results  of  operations  for  the  indicated  periods  (in 

thousands of dollars and as a percentage of total revenue): 

2003 

Fiscal Year Ended December 31, 
2004 

2005 

Revenues ................................................ $
Cost of revenues .....................................
Gross margin ..........................................
Operating expenses: 

Selling and marketing .........................
Software development ........................
General and administrative .................
Restructuring charge...........................  
Purchase amortization.........................
Total operating expenses........................
Income from operations .........................
Other income, net ...................................
Income before income taxes...................
Income tax expense (benefit) .................
Net income  ............................................ $

95,105 
30,742 
64,363 

26,537 
6,886 
26,451 
⎯ 
4,487 
64,361 
2 
380 
382 
282 
100 

100.0 % $  112,085 
     35,384 
     76,701 

32.3  
67.7  

100.0  %   $  134,338 
  44,286 
31.6 
    90,052 
68.4 

100.0 %
33.0 
67.0 

     29,458 
27.9  
       8,492 
7.3  
     27,654 
27.8  
0.0  
⎯ 
       4,351 
4.7  
     69,955 
67.7  
       6,746 
0.0  
       1,314 
0.4  
       8,060 
0.4  
 (16,925)
0.3  
0.1 % $    24,985 

26.3 
7.6 
24.6 
0.0 
3.9 
62.4 
6.0 
1.2 
7.2 
(15.1)     
22.3  %   $ 

  38,351 
  10,123 
         27,550 
2,217 
4,469 
  82,710 
7,342 
3,455 
    10,797 
4,340 
6,457 

28.6 
7.5 
20.5 
1.7 
3.3 
61.6 
5.4 
2.6 
8.0 
3.2 
4.8  %

26

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
   
   
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
   
 
   
   
 
 
 
   
 
 
   
 
 
 
 
   
 
 
 
   
 
 
 
   
 
 
   
 
 
 
   
 
 
 
   
 
 
 
 
 
 
   
 
 
   
 
   
   
 
 
 
 
Comparison of Year Ended December 31, 2005 and Year Ended December 31, 2004 

Revenues.  Revenues  grew  19.9%  from  $112.1  million  in  2004  to  $134.3  million  in  2005.  This  increase  in 
revenue  is  principally  due  to  further  penetration  of  our  subscription-based  information  services,  as  well  as  the 
successful  cross-selling  to  our  customer  base  across  our  service  platform  in  existing  markets  combined  with 
continued high renewal rates. In addition, NRB, which was acquired in January 2005, contributed approximately 
$1.9  million  of  our  revenues  for  the  year  ended  December  31,  2005.    Our  subscription-based  information 
services, consisting primarily of CoStar Property Professional, CoStar Tenant, CoStar COMPS Professional and 
FOCUS services, currently generate 95% of our total revenues.  

Gross Margin. Gross margin increased from $76.7 million in 2004 to $90.1 million in 2005. Gross margin 
percentage decreased from 68.4% in 2004 to 67.0% in 2005. The increase in the gross margin amount resulted 
principally  from  internal  revenue  growth  from  our  subscription-based  information  services.    Cost  of  revenues 
increased from $35.4 million in 2004 to $44.3 million in 2005, principally due to increased research department 
hiring, training, compensation and other operating costs associated with our 21-market and retail expansion, as 
well as research costs associated with further service enhancements to our existing platform.   

Selling  and  Marketing  Expenses.  Selling  and  marketing  expenses  increased  from  $29.5  million  in  2004  to 
$38.4  million  in  2005  and  increased  as  a  percentage  of  revenues  from  26.3%  in  2004  to  28.6%  in  2005.  The 
increase in the amount of selling and marketing expenses was primarily due to increased sales commissions and 
growth in the sales force as well as costs associated with sales and marketing efforts for our 21-market and retail 
expansion plan. 

Software  Development  Expenses.  Software  development  expenses  increased  from  $8.5  million  in  2004  to 
$10.1  million  in  2005  and  decreased  as  a  percentage  of  revenues  from  7.6%  in  2004  to  7.5%  in  2005.  The 
majority  of  the  increase  in  the  amount  of  software  and  development  expense  was  due  to  the  hiring  of  new 
employees  to  support  our  continued  focus  on  enhancements  to  our  existing  services,  development  of  new 
services and development costs for our internal information systems.  

General  and  Administrative  Expenses.  General  and  administrative  expenses  decreased  slightly  from  $27.7 
million in 2004 to $27.6 million in 2005 and decreased as a percentage of revenues from 24.6% in 2004 to 20.5% 
in  2005.  The  decrease  in  the  percentage  of  general  and  administrative  expenses  was  primarily  due  to  our 
continued efforts to control and leverage our overhead costs.  

Restructuring Charge. In the third quarter of 2005, we recorded a restructuring charge of approximately $2.2 
million in connection with the closing of our research center in Mason, Ohio.  The restructuring charge included 
amounts for wages, severance, occupancy and other costs.  We did not incur any restructuring charges in 2004. 

Purchase Amortization. Purchase amortization increased from $4.4 million in 2004 to $4.5 million in 2005. 

This increase was due to additional amortization associated with the NRB purchase. 

Other Income, Net. Interest and other income increased from $1.3 million in 2004 to $3.5 million in 2005. 
This increase was primarily a result of higher total cash, cash equivalents and short-term investment balances and 
increased interest rates during the year. 

Income Tax Expense (Benefit). Income tax expense (benefit) changed from a benefit of $16.9 million in 2004 
to  an  expense  of  $4.3  million  in  2005.      Income  tax  expense  in  2005  is  a  result  of  our  continued  profitability 
combined with the release of the valuation allowance on deferred tax assets in the fourth quarter of 2004. 

Comparison of Year Ended December 31, 2004 and Year Ended December 31, 2003 

Revenues.  Revenues  grew  17.9%  from  $95.1  million  in  2003  to  $112.1  million  in  2004.  This  growth  was 
principally the result of further penetration of our subscription-based information services into our existing and 
potential customer base, as well as the successful cross-selling of information services into our existing customer 
base  across  our  service  platform.  Subscription-based  information  services  consisting  primarily  of  CoStar 
Property  Professional,  CoStar  Tenant,  CoStar  COMPS  Professional,  and  FOCUS  services,  generated 
approximately 95% of our total revenues in 2004. 

27

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Gross Margin. Gross margin increased from $64.4 million in 2003 to $76.7 million in 2004. Gross margin 
percentage also increased from 67.7% in 2003 to 68.4% in 2004. The increase in the gross margin amount and 
percentage resulted principally from internal revenue growth from our subscription-based information services.  
Cost  of  revenues  increased  from  $30.7  million  in  2003  to  $35.4  million  in  2004,  principally  due  to  increased 
research  department  hiring,  training,  compensation  and  other  operating  costs  associated  with  our  21-market 
expansion plan. 

Selling  and  Marketing  Expenses.  Selling  and  marketing  expenses  increased  from  $26.5  million  in  2003  to 
$29.5  million  in  2004  and  decreased  as  a  percentage  of  revenues  from  27.9%  in  2003  to  26.3%  in  2004.  The 
increase in the amount of selling and marketing expenses was primarily due to increased sales commissions and 
marketing campaigns. 

Software  Development  Expenses.  Software  development  expenses  increased  from  $6.9  million  in  2003  to 
$8.5 million in 2004 and increased as a percentage of revenues from 7.3% in 2003 to 7.6% in 2004. This increase 
was due to the hiring of new employees to support our continued focus on enhancements to our existing services, 
development of new services and development of our internal information systems.  

General and Administrative Expenses. General and administrative expenses increased from $26.5 million in 
2003 to $27.7 million in 2004 and decreased as a percentage of revenues from 27.8% in 2003 to 24.6% in 2004. 
The increase in the amount of general and administrative expenses was primarily due to an increase in personnel 
expenses, professional fees and increased occupancy costs offset by a decrease in bad debt expense. 

Purchase Amortization. Purchase amortization decreased from $4.5 million in 2003 to $4.4 million in 2004. 
This  decrease  was  due  to  the  complete  amortization  of  certain  identifiable  intangible  assets  during  2003  and 
2004. 

Other Income, Net. Interest and other income increased from $380,000 in 2003 to $1.3 million in 2004. This 

increase was primarily a result of higher total cash balances in 2004 and higher interest rates during the year. 

Income  Tax  Expense  (Benefit).  Income  tax  expense  changed  from  an  expense  of  $282,000  in  2003  to  a 
benefit  of  $16.9  million  in  2004.  The  benefit  is  primarily  due  to  the  fourth  quarter  release  of  the  valuation 
allowance on the deferred tax asset, related to our net operating loss carryforwards. We released the valuation 
allowance  because  we  determined  that  it  was  more  likely  than  not  that  we  would  realize  the  benefit  of  the 
deferred tax asset through future taxable earnings. 

Consolidated Quarterly Results of Operations 

The following tables summarize our consolidated results of operations on a quarterly basis for the indicated 

periods (in thousands, except per share amounts, and as a percentage of total revenues): 

Mar. 31 
Revenues..........................   $  26,278 
7,941 
Cost of revenues ..............  
18,337 
Gross margin ...................  
Operating expenses..........  
17,106 
Income from operations...  

2004 

2005 

Jun. 30 
  $  27,456 
8,842 
  18,614 
  17,238 

Sep. 30 
  $ 28,610 
9,189 
19,421 
17,465 

Dec. 31 
  $ 29,741 
9,412 
20,329 
18,146 

Mar. 31 
  $ 31,343 
10,490 
20,853 
19,839 

Jun. 30 
  $ 32,871 
10,836 
22,035 
20,818 

Sep. 30 
  $  34,320 
  11,001 
  23,319 
  22,347 

Dec. 31 
  $ 35,804 
11,959 
23,845 
19,706 

Other income, net ............  
Income before income 

1,231 
238 

1,376 
286 

1,956 
311 

2,183 
479 

1,014 
604 

1,217 
719 

972 
932 

4,139 
1,200 

taxes ............................  

1,469 

1,662 

2,267 

2,662 

1,618 

1,936 

1,904 

5,339 

Income tax expense 

(benefit).......................  
Net income ......................   $ 

(12) 
1,481 

(74) 
  $  1,736 

  $

(100) 
2,367 

(16,739) 
  $ 19,401 

  $

644 
974 

  $

793 
1,143 

767 
  $  1,137 

  $

2,136 
3,203 

Net income per 
  share − basic ..................   $  
Net income per 
  share − diluted ...............   $ 

   0.08 

  $ 

   0.10 

$

  0.13 

$

  1.06 

$  

0.05 

  $  

0.06 

  $   

0.06 

$   0.17 

   0.08 

  $        0.09 

  $      0.13 

$      1.03 

$  

0.05 

$  

0.06 

  $   

0.06 

$   0.17 

28

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2004 

Mar. 31 
  100.0% 
30.2 
69.8 
65.1 

Jun. 30 
  100.0% 
32.2 
67.8 
62.8 

Sep. 30 
100.0% 
32.1 
67.9 
61.1 

Dec. 31 
100.0% 
31.6 
68.4 
61.1 

Mar. 31 
100.0% 
33.5 
66.5 
63.3 

2005 

Jun. 30 
100.0% 
33.0 
67.0 
63.3 

Sep. 30 
  100.0% 
32.1 
67.9 
65.1 

4.7 
0.9 

5.6 

0.0 
5.6% 

5.0 
1.1 

6.1 

6.8 
1.1 

7.9 

7.3 
1.7 

9.0 

(0.2) 
6.3% 

(0.4) 
8.3% 

(56.2) 
65.2% 

3.2 
2.0 

5.2 

2.1 
3.1% 

3.7 
2.2 

5.9 

2.4 
3.5% 

2.8 
2.7 

5.5 

2.2 
3.3% 

Dec. 31 
100.0% 
33.4 
66.6 
55.0 

11.6 
3.3 

14.9 

6.0 
8.9% 

Revenues..........................  
Cost of revenues ..............  
Gross margin ...................  
Operating expenses..........  
Income from operations...  

Other income, net ............  
Income before income 

taxes ............................  

Income tax expense 

(benefit).......................  
Net income.......................  

Recent Acquisitions 

Peer Market Research, Inc. On May 4, 2004, we acquired all of the outstanding capital stock of PeerMark, an 
online  provider  of  commercial  real  estate  information  in  Nashville  and  Memphis,  Tennessee,  for  $623,000  in 
cash and 5,318 shares of our common stock, valued at approximately $207,000.  In the second quarter of 2005, 
we  paid  the  PeerMark  shareholders  approximately  $255,000  in  additional  post-closing  cash  consideration, 
pursuant to the PeerMark acquisition agreement. 

Scottish  Property  Network    On  June  16,  2004,  our  U.K.  subsidiary  acquired  SPN,  a  provider  of  online 
commercial property information in Scotland.  We acquired substantially all of the assets of the SPN business, 
together with all of the outstanding capital stock of SPN, for approximately $1.3 million in cash. 

RealComp,  Inc.    On  September  17,  2004,  we  acquired  substantially  all  of  the  assets  of  RealComp,  Inc.,  a 

local comparable sales information provider in Denver, Colorado, for approximately $350,000 in cash.   

National  Research  Bureau.    On  January  20,  2005,  the  Company  acquired  the  assets  of  NRB,  a  leading 
provider  of  property  information  to  the  shopping  center  industry,  from  Claritas  Inc.  for  approximately  $4.1 
million in cash.  

Accounting  Treatment.    All  of  the  acquisitions  discussed  above  have  been  accounted  for  using  purchase 
accounting.  The  purchase  price  for  each  of  the  acquisitions  was  allocated  primarily  to  acquired  database 
technology,  customer  base  and  goodwill.    The  acquired  database  technology  for  each  acquisition  is  being 
amortized on a straight-line basis over 5 years.  The customer base for each acquisition, which consists of one 
distinct intangible asset composed of acquired customer contracts and the related customer relationships, is being 
amortized on a 125% declining balance method over 10 years.  Goodwill will not be amortized, but is subject to 
annual  impairment  tests.  The  results  of  operations  of  PeerMark,  SPN,  RealComp  and  NRB  have  been 
consolidated with our results since the respective dates of acquisition. The operating results of each of PeerMark, 
SPN RealComp, and NRB are not considered material to our consolidated financial statements, and accordingly, 
pro forma financial information has not been presented for any of the acquisitions. 

Liquidity and Capital Resources 

Our  principal  sources  of  liquidity  are  cash,  cash  equivalents  and  short-term  investments.  Total  cash,  cash 
equivalents and short-term investments were $134.2 million at December 31, 2005 compared to $117.1 million at 
December  31,  2004.    From  December  31,  2004  to  December  31,  2005,  cash,  cash  equivalents  and  short-term 
investments  increased  $17.1  million,  principally  as  a  result  of  EBITDA  of  $19.1  million,  interest  income,  and 
proceeds of $7.4 million from exercise of stock options, partially offset by purchases of property and equipment 
and  other  assets  of  approximately  $8.4  million,  cash  used  for  the  purchase  of  NRB,  and  changes  in  working 
capital accounts.  

29

 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
Net cash provided by operating activities for the year ended December 31, 2005 was $22.9 million compared 
to  $24.7  million  for  the  year  ended  December  31,  2004.  The  $1.8  million  decrease  in  net  cash  provided  by 
operating  activities  is  primarily  due  to    changes  in  working  capital  accounts  partially  offset  by  an  increase  in 
income  before  income  taxes as  a  result  of revenue growth,  resulting  growth  in gross margin  and  income  from 
operations and interest income.. 

Net cash used in investing activities was $38.7 million for the year ended December 31, 2005 compared to 
$29.9  million  for  the  year  ended  December  31,  2004.  This  $8.8  million  increase  in  net  cash  used  in  investing 
activities was principally due to the increase in net purchases and sales of short-term investments and increased 
cash used in acquisitions offset by decreased purchases of property and equipment and other assets. 

Net cash provided by financing activities was $7.4 million for the year ended December 31, 2005 compared 
to $6.3 million for the year ended December 31, 2004.  The higher net cash produced by financing activities in 
2005 over 2004 is due to an increase in proceeds from the exercise of stock options. 

Contractual  Obligations.  The  following  table  summarizes  our  principal  contractual  obligations  at 
December 31, 2005 and the effect such obligations are expected to have on our liquidity and cash flows in future 
periods (in thousands):  

Operating leases............................................ $ 28,467
Purchase obligations(1)  .................................
5,250
Total contractual principal cash obligations.. $ 33,717

$

$

7,217
5,180
12,397

Total 

2006 

2007-2008 
12,060
$
63
12,123

$

2009-2010 
$

2011 and 
thereafter
2,509
⎯
2,509

6,681     $ 
7    
6,688     $ 

$

(1)  Amounts do not include current purchase obligations that may be renewed on the same or different terms or 

terminated by us or a third party. 

On  February  23,  2005,  the  Company  entered  into  an  operating  lease  agreement,  pursuant  to  which  the 
Company has agreed to lease approximately 33,371 square feet of office space located in Columbia, Maryland. 
The lease has an initial term of 99 months and an initial base rent of $22.75 per rentable square foot per year. 
Additionally,  the  Company  has  a  conditional  option  both  to  terminate  the  lease  approximately  five  years  after 
commencement of the initial term, and to renew the lease for an additional five year period after expiration of the 
initial term. 

During  2005,  we  incurred  capital  expenditures  of  approximately  $8.4  million,  including  expenditures  of 
approximately $4.8 million related to building photography costs and the purchase of field research vehicles and 
equipment  in  connection  with  our  21-market  expansion,  and  the  remaining  $3.6  million  related  to  costs  of 
supporting  our  existing  operations.    We  expect  to  make  capital  expenditures  in  2006  totaling  approximately 
$12.0 to $15.0 million in connection with investments in assets required to support our existing operations and 
our geographic and retail expansion, including building photography, initial databases and communications, and 
measuring, photographic and computer equipment.  

To date, we have grown in part by acquiring other companies and we may continue to make acquisitions. Our 
acquisitions may vary in size and could be material to our current operations. We expect to use cash, stock, debt 
or other means of funding to make these acquisitions. 

Based  on  current  plans,  we  believe  that  our  available  cash  combined  with  positive  cash  flow  provided  by 

operating activities should be sufficient to fund our operations for at least the next 12 months. 

As  of  the  fourth  quarter  of  2004,  we  determined  that  it  was  more  likely  than  not  that  we  would  generate 
taxable  income  from  operations  and  be  able  to  realize  tax  benefits  arising  from  use  of  our  net  operating  loss 
carryforwards to reduce the income tax we will owe on this taxable income. Prior to the fourth quarter of 2004, 
we recorded a valuation allowance on the deferred tax assets associated with these future tax benefits because we 
were not certain we would generate taxable income in the future. The release of the valuation allowance in the 
fourth quarter resulted in a tax benefit of approximately $26.2 million. This included an income tax benefit of 
approximately $16.7 million that was recognized in our results from operations. We also recognized a tax benefit 
of approximately $9.5 million as additional paid-in capital for our net operating loss carryforwards attributable to 

30

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
tax deductions for stock options. As of December 31, 2005, we continued to maintain a valuation allowance of 
approximately $687,000 for certain state net operating loss carryforwards.  At December 31, 2005, the Company 
has  net  operating  loss  carryforwards  for  federal  income  tax  purposes  of  approximately,  $63.0  million,  which 
expire, if unused, from the year 2013 through the year 2023. 

For  the  foreseeable  future,  we  expect  to  record  income  tax  expense  on  our  results  from  operations  at  an 
effective rate of approximately 42.5% to 43.5%. For the next several years, however, we expect the majority of 
our  taxable  income  to  be  absorbed  by  our  net  operating  loss  carryforwards.  As  a  result,  we  expect  our  cash 
payments  for  taxes  to  be  limited  primarily  to  federal  alternative  minimum  taxes  and  to  state  income  taxes  in 
certain states. 

Inflation may affect the way we operate in the U.S and the U.K.  In general, we believe that over time we are 
able to increase the prices of our services to counteract the majority of the inflationary effects of increasing costs.  
We do not believe the impact of inflation has significantly affected our operations, and we do not anticipate that 
inflation will have a material impact on our operations in 2006. 

Recent Accounting Pronouncements 

We initially adopted the Emerging Issues Task Force (“EITF”) consensus on Issue No. 03-1, “The Meaning 
of  Other-Than-Temporary  Impairment  and  Its  Application  to  Certain  Investments”  on  July 1,  2004,  and  the 
Financial  Accounting  Standards  Board  Staff  Position  (“FSP”)  EITF  Issue  No. 03-1-1,  Effective  Date  of 
Paragraphs 10-20  of  EITF  Issue  No. 03-1,  “The  Meaning  of  Other-Than-Temporary  Impairment  and  Its 
Application  to  Certain  Investments”  on  September 30,  2004.  The  consensus  on  Issue  No. 03-1  applies  to 
investments  in  marketable  debt  and  equity  securities,  as well  as  investments  in  equity  securities  accounted for 
under the cost method. It provides guidance for determining when an investment is considered impaired, whether 
the impairment is other than temporary, and the measurement of an impairment loss. The guidance also includes 
accounting  considerations  subsequent  to  the  recognition  of  an  other-than-temporary  impairment  and  requires 
certain disclosures about unrealized losses that have not been recognized as other-than-temporary impairments. 
FSP EITF Issue No. 03-1-1 delays the effective date of paragraphs 10-20 of EITF Issue No. 03-1, which provide 
guidance  for  determining  whether  the  impairment  is  other  than  temporary,  the  measurement  of  an  impairment 
loss,  and  accounting  considerations  subsequent  to  the  recognition  of  an  other-than-temporary  impairment. 
Application  of  these  paragraphs  is  deferred  pending  issuance  of  proposed  FSP  EITF  Issue  No. 03-1-a.  The 
adoption of EITF Issue No. 03-1 and FSP EITF Issue No. 03-1-1 did not have a material impact on our financial 
position or results of operations. On November 3, 2005 the FASB issued FSP EITF Issue No. 03-1-a (renamed as 
FSP  FAS  115-1  and  FAS  124-1,  “The  Meaning  of  Other-Than-Temporary  Impairment  and  Its  Application  to 
Certain Investments”), which provides guidance effective for fiscal periods beginning after December 15, 2005. 
The  Company  is  currently  evaluating  the  effect  that  the  adoption  of  FAS  115-1  will  have  on  its  consolidated 
results of operations and financial condition but does not expect it to have a material impact. 

In  December  2004,  the  Financial  Accounting  Standards  Board  (“FASB”)  FASB  issued  SFAS  No.  153, 
“Exchanges  of  Nonmonetary  Assets—An  Amendment  of  APB  Opinion  No.  29,  Accounting  for  Nonmonetary 
Transactions” (“SFAS 153”). SFAS 153 eliminates the exception from fair value measurement for nonmonetary 
exchanges  of  similar  productive  assets  in  paragraph  21(b)  of  APB  Opinion  No.  29,  “Accounting  for 
Nonmonetary  Transactions,”  and  replaces  it  with  an  exception  for  exchanges  that  do  not  have  commercial 
substance. SFAS 153 specifies that a nonmonetary exchange has commercial substance if the future cash flows 
of the entity are expected to change significantly as a result of the exchange. SFAS 153 is effective for the fiscal 
periods beginning after June 15, 2005 and the Company is required to adopt it beginning January 1, 2006. The 
Company is currently evaluating the effect that the adoption of SFAS 153 will have on its consolidated results of 
operations and financial condition but does not expect it to have a material impact. 

In May 2005, the FASB issued SFAS No. 154, “Accounting Changes and Error Corrections—a replacement 
of APB Opinion No. 20 and FASB Statement No. 3” (“SFAS 154”). SFAS 154 replaces APB Opinion No. 20, 
“Accounting Changes” and SFAS No. 3, “Reporting Accounting Changes in Interim Financial Statements,” and 
changes the requirements for accounting for and reporting a change in accounting principle. SFAS 154 requires 
restatement  of  prior  period  financial  statements,  unless  impracticable,  for  voluntary  changes  in  accounting 
principle. The retroactive application of a change in accounting principle should be limited to the direct effect of 
the change. Changes in depreciation, amortization or depletion methods should be accounted for prospectively as 
a  change  in  accounting  estimate.  Corrections  of  accounting  errors  will  be  accounted  for  under  the  guidance 

31

 
 
 
 
 
 
 
 
 
contained in APB Opinion No. 20. The effective date of this new pronouncement is for fiscal years beginning 
after December 15, 2005 and prospective application is required. We do not expect the adoption of SFAS 154 to 
have a material impact on our consolidated financial statements. 

In March 2005, the FASB issued FIN No. 47, “Accounting for Conditional Asset Retirement Obligations – an 
interpretation  of  FASB  Statement  No. 143  “Accounting  for  Asset  Retirement  Obligations  (“SFAS  No. 143”)” 
(“FIN  47”).  FIN  47  clarifies  that  the  term  conditional  asset  retirement  obligation  as  used  in  FASB  Statement 
No. 143, refers to a legal obligation to perform an asset retirement activity in which the timing and (or) method 
of  settlement  are  conditional  on  a  future  event  that  may  or  may  not  be  within  the  control  of  the  entity. 
Accordingly,  an  entity  is  required  to  recognize  a  liability  for  the  fair  value  of  a  conditional  asset  retirement 
obligation if the fair value of the liability can be reasonably estimated. Any uncertainty about the amount and/or 
timing of future settlement should be factored into the measurement of the liability when sufficient information 
exists. The liability for the conditional asset retirement obligation should be recognized when incurred. FIN 47 
also clarifies when an entity would have sufficient information to reasonably estimate the fair value of an asset 
retirement obligation. FIN 47 is effective for fiscal periods beginning after December 15, 2005.  The Company 
does not expect the adoption of FIN 47 to have a material impact on our consolidated financial statements. 

In  December 2004,  the  Financial  Accounting  Standards  Board  issued  Statement  of  Financial  Accounting 
Standard  No.  123  (Revised  2004),  “Share-Based  Payment”  (“SFAS 123R”).  Under  previous  practice,  the 
reporting entity could account for share-based payment under the provisions of APB 25 and disclose pro forma 
share-based  compensation  as  accounted  for  under  the  provisions  of  SFAS  123.  Under  the  provisions  of  SFAS 
123R, a public entity is required to measure the cost of employee services received in exchange for an award of 
equity instruments based on the grant-date fair value of the award. That cost is recognized over the period during 
which  an  employee  is  required  to  provide  service  in  exchange  for  the  award. SFAS 123R became  effective  in 
January  2006.  As  such,  we  expect  to  adopt  its  provisions  for  the  fiscal  quarter  beginning  after  December  31, 
2005.  Application  of  this  pronouncement  requires  management  to  make  significant  judgments  regarding  the 
variables in an option pricing  model, including stock price volatility and employee exercise behavior. Most of 
these variables are either highly dependent on the current economic environment at the date of grant or forward-
looking over the expected term of the award. The Company is continuing to assess the impact of the adoption of 
SFAS 123R, but currently expects to incur $3.0 to $4.0 million in charges for stock option compensation expense 
in 2006. 

Item 7A. Quantitative and Qualitative Disclosures About Market Risk  

We provide information services to the commercial real estate and related business community in the United 
States and the United Kingdom. Our functional currency for our operations in the United Kingdom is the local 
currency. As such, fluctuations in the British Pound may have an impact on our business, results of operations 
and financial condition. We currently do not use financial instruments to hedge our exposure to exchange rate 
fluctuations with respect to our foreign subsidiaries. We may seek to enter hedging transactions in the future to 
reduce  our  exposure  to  exchange  rate  fluctuations,  but  we  may  be  unable  to  enter  into  hedging  transactions 
successfully, on acceptable terms or at all.  As of December 31, 2005, accumulated other comprehensive income 
(loss) included a gain from foreign currency translation adjustments of approximately $1.7 million. 

We  do  not  have  material  exposure  to  market  risks  associated  with  changes  in  interest  rates  related  to  cash 

equivalent securities held as of December 31, 2005. 

We  have  a  substantial  amount  of  intangible  assets.  Although,  as  of  December  31,  2005,  we  believe  our 
intangible  assets  will  be  recoverable,  changes  in  the  economy,  the  business  in  which  we  operate  and  our  own 
relative performance could change the assumptions used to evaluate intangible asset recoverability. In the event 
that  we  determine  that  an  asset  has  been  impaired,  we  would  recognize  an  impairment  charge  for  the  excess 
amount by which the carrying amount of the assets exceeds the fair value of the asset. We continue to monitor 
these assumptions and their effect on the estimated recoverability of our intangible assets. 

Item 8. Financial Statements and Supplementary Data 

Financial  Statements  meeting  the  requirements  of  Regulation  S-X  are  set  forth  beginning  at  page  F-1. 
Supplementary data is set forth in Management’s Discussion and Analysis of Financial Condition and Results of 
Operations under the caption “Consolidated Quarterly Results of Operations.” 

32

 
 
 
 
 
 
 
 
 
 
 
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure 

None.  

Item 9A. Controls and Procedures 

We maintain disclosure controls and procedures that are designed to ensure that information required to be 
disclosed  in  our  reports  filed  or  submitted  under  the  Exchange  Act  is  recorded,  processed,  summarized  and 
reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms, and 
that  such  information  is  accumulated  and  communicated  to  our  management,  including  our  Chief  Executive 
Officer and Chief Financial Officer, as appropriate, to allow for timely decisions regarding required disclosure. 
In  designing  and  evaluating  the  disclosure  controls  and  procedures,  management  recognized  that  any  controls 
and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving 
the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit 
relationship of possible controls and procedures. 

As of December 31, 2005, we carried out an evaluation, under the supervision and with the participation of 
our management, including our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of 
the design and operation of our disclosure controls and procedures. Based on the foregoing, our Chief Executive 
Officer  and  Chief  Financial  Officer  concluded  that  our  disclosure  controls  and  procedures  were  effective  and 
were operating at the reasonable assurance level. 

There  have  been  no  changes  in  our  internal  control  over  financial  reporting  during  our  most  recent  fiscal 
quarter  that  have  materially  affected,  or  are  reasonably  likely  to  materially  affect,  our  internal  control  over 
financial reporting.  

Management’s Report on Internal Control over Financial Reporting 

Management  of  CoStar  is  responsible  for  establishing  and  maintaining  adequate  internal  control  over 
financial  reporting  and  for  the  assessment  of  the  effectiveness  of  internal  control  over  financial  reporting.  As 
defined  by  the  Securities  and  Exchange  Commission,  internal  control  over  financial  reporting  is  a  process 
designed  by,  or  supervised  by,  the  Company’s  principal  executive  and  principal  financial  officers,  to  provide 
reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements in 
accordance with generally accepted accounting principles.    

The Company’s internal control over financial reporting is supported by written policies and procedures, that 
(1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions 
and  dispositions  of  the  Company’s  assets;  (2)  provide  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  the  Company’s  management  and  directors;  and  (3) provide  reasonable  assurance  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  financial  reporting  may  not  prevent  or  detect 
misstatements.    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  compliance  with  the 
policies or procedures may deteriorate. 

In  connection  with  the  preparation  of  the  Company's  annual  financial  statements,  management  of  the 
Company has undertaken an assessment of the effectiveness of the Company’s internal control over financial 
reporting  as  of  December  31,  2005  based  on  criteria  established  in  Internal  Control  –  Integrated  Framework 
issued by the Committee of Sponsoring Organizations of the Treadway Commission (“the COSO Framework”).  
Management's assessment included an evaluation of the design of the Company's internal control over financial 
reporting and testing of the operational effectiveness of the Company's internal control over financial reporting. 

33

 
 
 
 
 
 
 
 
 
 
Based  on  this  assessment,  management  did  not  identify  any  material  weakness  in  the  Company's  internal 
control,  and  management  has  concluded  that  the  Company's  internal  control  over  financial  reporting  was 
effective as of December 31, 2005. 

Ernst & Young, LLP, the independent registered public accounting firm that audited the Company's financial 
statements included in this report, has issued an attestation report on management's assessment of internal control 
over financial reporting, a copy of which is included in this Annual Report on Form 10-K.  

Item 9B. Other Information. 

None. 

Item 10. Directors and Executive Officers of the Registrant 

PART III 

The  information  required  by  this  Item  is  incorporated  by  reference  to  our  Proxy  Statement  for  our  2006 

annual meeting of stockholders. 

Item 11. Executive Compensation 

The  information  required  by  this  Item  is  incorporated  by  reference  to  our  Proxy  Statement  for  our  2006 

annual meeting of stockholders. 

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder 
Matters 

The  information  required  by  this  Item  is  incorporated  by  reference  to  our  Proxy  Statement  for  our  2006 

annual meeting of stockholders. 

Item 13. Certain Relationships and Related Transactions 

The  information  required  by  this  Item  is  incorporated  by  reference  to  our  Proxy  Statement  for  our  2006 

annual meeting of stockholders. 

Item 14. Principal Accountant Fees and Services 

The  information  required  by  this  Item  is  incorporated  by  reference  to  our  Proxy  Statement  for  our  2006 

annual meeting of stockholders. 

Item 15. Exhibits and Financial Statement Schedules 

PART IV 

(a)(1) The following financial statements are filed as a part of this report: CoStar Group, Inc. Consolidated 

Financial Statements. 

(a)(2)  All  schedules  are  omitted  because  they  are  not  applicable  or  not  required  or  because  the  required 
information is incorporated herein by reference or included in the financial statements or related notes included 
elsewhere in this report. 

(a)(3)  The  documents  required  to  be  filed  as  exhibits  to  this  Report  under  Item  601  of  Regulation  S-K  are 

listed in the Exhibit Index included elsewhere in this report, which list is incorporated herein by reference. 

34

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
SIGNATURES 

Pursuant to the requirements of Section 13 of the Securities Act of 1934, as amended, the Registrant has duly 
caused  this  report  to  be  signed  on  its  behalf  by  the  undersigned,  thereunto  duly  authorized,  in  the  City  of 
Bethesda, State of Maryland, on the 6th day of March 2006. 

COSTAR GROUP, INC. 

By: 

/S/ Andrew C. Florance  
Andrew C. Florance 
President and Chief Executive Officer 

KNOW  ALL  PERSONS  BY  THESE  PRESENTS,  that  each  individual  whose  signature  appears  below 
constitutes and appoints Andrew C. Florance and Frank A. Carchedi, and each of them individually, as their true 
and lawful attorneys-in-fact and agents, with full power of substitution, for him and in his name, place and stead, 
in any and all capacities, to sign any and all amendments  to this report, and to file the same, with all exhibits 
thereto  and  to all  documents  in  connection therewith, with  the  Securities  and Exchange  Commission,  granting 
unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and 
every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes 
as he might or could do in person, herein by ratifying and confirming all that said attorneys-in-fact and agents or 
any of them, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. 

Pursuant to the requirements of the Securities Act of 1934, as amended, this report has been signed by the 

following persons on behalf of the registrant and in the capacities and on the dates indicated. 

Signature 

Capacity 

Date 

/S/ Michael R. Klein 

Michael R. Klein 

/S/ Andrew C. Florance 

Andrew C. Florance 

/S/ Frank A. Carchedi 

Frank A. Carchedi 

/S/ David Bonderman 

David Bonderman 

/S/ Warren H. Haber 

Warren H. Haber 

/S/ Josiah O. Low, III 

Josiah O. Low, III 

/S/ Christopher Nassetta 

Christopher Nassetta 

/S/ Catherine B. Reynolds 

Catherine B. Reynolds 

Chairman of the Board 

February 28, 2006 

Chief Executive Officer and  
President and a Director  
(Principal Executive Officer) 

  March 6, 2006 

Chief Financial Officer  
(Principal Financial and Accounting 
Officer) 

  March 6, 2006 

February 28, 2006 

February 20, 2006 

February 21, 2006 

February 28, 2006 

  March 3, 2006 

Director  

Director  

Director  

Director 

Director 

35

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 
No. 
2.1 

INDEX TO EXHIBITS 

Description 

  Offer Document by CoStar Limited for the share capital of Property Intelligence plc (Incorporated by 
reference  to  Exhibit  2.1  to  Amendment  No.  2  to  the  Registration  Statement  on  Form  S-3  of  the 
Registrant (Reg. No. 333-106769) filed with the Commission on August 14, 2003). 

3.1 

  Restated  Certificate  of  Incorporation (Incorporated  by  reference  to  Exhibit  3.1  the  Registration 
Statement on Form S-1 of the Registrant (Reg. No. 333-47953) filed with the Commission on March 
13, 1998 (the “1998 Form S-1”)). 

3.2 

  Certificate of Amendment of Restated Certificate of Incorporation (Incorporated by reference to Exhibit 

3.1 to the Registrant’s Report on Form 10-Q for the quarter ended June 30, 1999). 

3.3 
4.1 

  Amended and Restated By-Laws (Incorporated by reference to Exhibit 3.2 to the 1998 Form S-1). 
  Specimen  Common  Stock  Certificate  (Incorporated  by  reference  to  Exhibit  4.1  to  the  Registrant’s 

Report on Form 10-K for the year ended December 31, 1999 (the “1999 10-K”)). 

*10.1 

  CoStar Group, Inc. 1998 Stock Incentive Plan, as amended (Incorporated by reference to Exhibit 10.1 

to the Registrant’s Report on Form 10-Q for the quarter ended September 30, 2005). 

*10.2 

*10.3 

  Employment  Agreement  for  Andrew  C.  Florance  (Incorporated  by  reference  to  Exhibit  10.2  to 
Amendment No. 1 to the Registration Statement on Form S-1 of the Registrant (Reg. No. 333-47953) 
filed with the Commission on April 27, 1998). 

  Employment Agreement for Frank A. Carchedi (Incorporated by reference to Amendment No. 1 to the 
Registration Statement on Form S-1 of the Registrant (Reg. No. 333-47953) filed with the Commission 
on April 27, 1998). 

*10.3.1    Addendum to Employment Agreement, dated as of April 1, 2004, between CoStar Realty Information, 
Inc. and Frank Carchedi (Incorporated by reference to Exhibit 10.2 to the Registrant’s Report on Form 
10-Q for the quarter ended June 30, 2004). 

*10.4 

  Employment Terms for Craig Farrington (Incorporated by reference to Exhibit 10.7 to the Registrant’s 

Report on Form 10-K for the year ended December 31, 2000). 

*10.4.1    Addendum to Employment Terms, dated as of April 1, 2004, between CoStar Realty Information, Inc. 
and Craig Farrington (Incorporated by reference to Exhibit 10.4 to the Registrant’s Report on Form 10-
Q for the quarter ended June 30, 2004). 

*10.5 

*10.6 

*10.7 

  Employment  Agreement,  dated  as  of  November  29,  2004,  between  Christopher  Tully  and  CoStar 
Realty Information, Inc. (Incorporated by reference to Exhibit 10.6 to the Registrant’s Report on Form 
10-K for the year ended December 31, 2004).  

  Form  of  Indemnification  Agreement  between  the  Registrant  and  each  of  its  officers  and  directors 
(Incorporated  by  reference  to  Exhibit  10.1  to  the  Registrant’s  Report  on  Form  10-Q  for  the  quarter 
ended March 31, 2004).   

  Form  of  Stock  Option  Agreement  between  the  Registrant  and  certain  of  its  officers,  directors  and 
employees (Incorporated by reference to Exhibit 10.8 to the Registrant’s Report on Form 10-K for the 
year ended December 31, 2004). 

*10.7.1    Form  of  Stock  Option  Agreement  between  the  Registrant  and  Andrew  C.  Florance  (Incorporated  by 
reference to Exhibit 10.8.1 to the Registrant’s Report on Form 10-K for the year ended December 31, 
2004). 

*10.7.2    Form  of  Stock  Option  Agreement  between  the  Registrant  and  Frank  A.  Carchedi  (Incorporated  by 
reference to Exhibit 10.8.2 to the Registrant’s Report on Form 10-K for the year ended December 31, 
2004). 

*10.8 

10.9 

  Form  of  Restricted  Stock  Agreement  between  the  Registrant  and  certain  of  its  officers,  directors  and 
employees (Incorporated by reference to Exhibit 10.9 to the Registrant’s Report on Form 10-K for the 
year ended December 31, 2004). 

  Office Lease, dated August 12, 1999, between CoStar Realty Information, Inc. and Newlands Building 
Ventures, LLC (Incorporated by reference to Exhibit 10.2 to the Registrant’s Report on Form 10-Q for 
the quarter ended September 30, 1999). 

36

 
 
 
 
 
 
 
 
 
Exhibit 
No. 

10.10 

Description 

Office Sublease, dated June 14, 2002, between CoStar Realty Information, Inc., CoStar Group, Inc. and 
Gateway, Inc. (Incorporated by reference to Exhibit 10.2 to the Registrant’s Report on Form 10-Q dated 
June 30, 2002). 

10.11    Addendum  No.  3  to  Office  Lease,  dated  as  of  May  12,  2004,  between  Newlands  Building  Venture, 
LLC, and CoStar Realty Information, Inc. (Incorporated by reference to Exhibit 10.1 to the Registrant’s 
Report on Form 10-Q for the quarter ended June 30, 2004). 

10.12    Office Lease, dated as of February 23, 2005, between CoStar Realty Information, Inc. and Crestpointe 
III, LLC. (Incorporated by reference to Exhibit 10.13 to the Registrant’s Report on Form 10-K for the 
year ended December 31, 2004). 

21.1 
23.1 
24.1 
31.1 

  Subsidiaries of the Registrant (filed herewith). 
  Consent of Ernst & Young LLP, Independent Registered Public Accounting Firm (filed herewith). 
  Powers of Attorney (Included in the Signature Pages to the Report). 
  Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 

(filed herewith). 

31.2 

  Certification of Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 

(filed herewith). 

32.1 

  Certification  of  Principal  Executive  Officer  pursuant  to  18  U.S.C.  Sec.  1350,  as  adopted  pursuant  to 

Section 906 of the Sarbanes-Oxley Act of 2002 (filed herewith). 

32.2 

  Certification  of  Principal  Financial  Officer  pursuant  to  18  U.S.C.  Sec.  1350,  as  adopted  pursuant  to 

Section 906 of the Sarbanes-Oxley Act of 2002 (filed herewith). 

* Management Contract or Compensatory Plan or Arrangement. 

37

 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS 

Reports of Independent Registered Public Accounting Firm.......................................................................... F-2 
Consolidated Statements of Operations for the years ended December 31, 2003, 2004 and 2005 ................. F-4 
Consolidated Balance Sheets as of December 31, 2004 and 2005 .................................................................. F-5 
Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2003, 2004 and 2005  F-6 
Consolidated Statements of Cash Flows for the years ended December 31, 2003, 2004 and 2005 ................ F-7 
Notes to Consolidated Financial Statements ................................................................................................... F-8 

F-1 

 
 
 
 
 
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 

The Board of Directors and Shareholders of CoStar Group, Inc. 

We have audited the accompanying consolidated balance sheets of CoStar Group, Inc. as of December 31, 2005 
and 2004, and the related consolidated statements of operations, stockholders’ equity and cash flows for each of the 
three  years  in  the  period  ended  December  31,  2005.  These  financial  statements  are  the  responsibility  of  the 
Company's  management.  Our  responsibility  is  to  express  an  opinion  on  these  financial  statements  based  on  our 
audits.  

We conducted our audits 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  includes  examining,  on  a  test  basis, 
evidence  supporting  the  amounts  and  disclosures  in  the  financial  statements.  An  audit  also  includes  assessing  the 
accounting  principles  used  and  significant  estimates  made  by  management,  as  well  as  evaluating  the  overall 
financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.  

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated 
financial  position  of  CoStar  Group,  Inc.  at  December  31,  2005  and  2004,  and  the  consolidated  results  of  its 
operations and its cash flows for each of the three years in the period ended December 31, 2005, in conformity with 
U.S. generally accepted accounting principles.  

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board 
(United States), the effectiveness of CoStar Group, Inc.'s internal control over financial reporting as of December 
31,  2005,  based  on  criteria  established  in  Internal  Control  Integrated  Framework  issued  by  the  Committee  of 
Sponsoring  Organizations  of  the  Treadway  Commission  and  our  report  dated  February  15,  2006  expressed  an 
unqualified opinion thereon.   

/s/  Ernst & Young LLP  

McLean, Virginia 
February 15, 2006  

F-2 

 
 
 
  
  
  
  
  
 
                               
 
 
 
  
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 

The Board of Directors and Shareholders of CoStar Group, Inc.  

We  have  audited  management’s  assessment,  included  in  the  accompanying  Management’s  Report  on  Internal 
Control  over  Financial  Reporting,  that  CoStar  Group,  Inc.  maintained  effective  internal  control  over  financial 
reporting as of December 31, 2005, based on criteria established in Internal Control—Integrated Framework issued 
by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria).  CoStar Group, 
Inc.’s  management  is  responsible  for  maintaining  effective  internal  control  over  financial  reporting  and  for  its 
assessment  of  the  effectiveness  of  internal  control  over  financial  reporting.  Our  responsibility  is  to  express  an 
opinion  on  management’s  assessment  and  an  opinion  on  the  effectiveness  of  the  company’s  internal  control  over 
financial reporting based on our audit.  

We conducted our audit 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.  Our  audit 
included  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 considered necessary in the circumstances. We believe that our audit provides a reasonable 
basis for our opinion. 

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  (1)  pertain  to  the  maintenance  of  records  that,  in  reasonable  detail, 
accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide 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  (3)  provide  reasonable 
assurance 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  financial  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  compliance  with  the 
policies or procedures may deteriorate. 

In  our  opinion,  management’s  assessment  that  CoStar  Group,  Inc.  maintained  effective  internal  control  over 
financial reporting as of December 31, 2005, is fairly stated, in all material respects, based on the COSO criteria.  
Also, in our opinion, CoStar Group, Inc. maintained, in all material respects, effective internal control over financial 
reporting as of December 31, 2005, based on the COSO criteria. 

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board 
(United  States),  the  consolidated  balance  sheets  as  of  December  31,  2005  and  2004  and  the  related  consolidated 
statements  of  operations,  stockholder’s  equity  and  cash  flows  for  each  of  the  three  years  in  the  period  ended 
December 31, 2005 of CoStar Group, Inc. and our report dated February 15, 2006 expressed an unqualified opinion 
thereon. 

/s/  Ernst & Young LLP 

McLean, Virginia 
February 15, 2006 

F-3 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 

CONSOLIDATED STATEMENTS OF OPERATIONS 
(in thousands, except per share data) 

Year Ended December 31, 
2004 

2005 

2003 

Revenues............................................................................................ $  95,105 
 30,742 
Cost of revenues ................................................................................
 64,363 
Gross margin .....................................................................................

  $ 112,085 
 35,384 
 76,701 

  $  134,338 
   44,286 
   90,052 

Operating expenses: 

Selling and marketing...................................................................
Software development..................................................................
General and administrative...........................................................
Restructuring charge ....................................................................
Purchase amortization ..................................................................

Income from operations.....................................................................
Other income (expense): 

Interest income .............................................................................
Other expense...............................................................................
Income before income taxes ..............................................................
Income tax expense (benefit).............................................................
Net income......................................................................................... $

 26,537 
  6,886 
 26,451 
  ⎯ 
  4,487 
 64,361 
2 

 29,458 
  8,492 
 27,654 
  ⎯ 
  4,351 
 69,955 
  6,746 

   38,351 
   10,123 
   27,550 
    2,217 
    4,469 
   82,710 
    7,342 

381 
(1) 
382 
282 
100 

  1,314 
  ⎯ 
  8,060 
(16,925) 
  $  24,985 

    3,455 
    ⎯ 
   10,797 
4,340 
  $    6,457 

Net income per share ⎯ basic ........................................................... $   0.01 
Net income per share ⎯ diluted ........................................................ $   0.01 

  $  

  $  

1.38 

1.33 

  $   

  $   

0.35 

0.34 

Weighted average outstanding shares ⎯ basic..................................

Weighted average outstanding shares ⎯ diluted...............................

16,202 

16,674 

 18,165 

 18,827 

   18,453 

   19,007 

See accompanying notes. 

F-4 

 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 

CONSOLIDATED BALANCE SHEETS 
(in thousands except per share data) 

December 31, 

2004 

2005 

ASSETS 

Current assets: 

Cash and cash equivalents........................................................................... $
Short-term investments ...............................................................................
Accounts receivable, less allowance for doubtful accounts of 

approximately $1,375 and $1,602 as of December 31, 2004 and 2005 ...
Deferred income taxes, net..........................................................................
Prepaid expenses and other current assets...................................................
Total current assets ...........................................................................................

Deferred income taxes, net ...............................................................................
Property and equipment, net .............................................................................
Goodwill, net ....................................................................................................
Intangibles and other assets, net .......................................................................
Deposits ............................................................................................................
Total assets ....................................................................................................... $

36,807 
80,262 

3,921 
4,177 
1,916 
127,083 

21,487 
13,489 
41,937 
27,657 
1,038 
232,691 

LIABILITIES AND STOCKHOLDERS’ EQUITY 

Current liabilities: 

Accounts payable ........................................................................................ $
Accrued wages and commissions................................................................
Accrued expenses........................................................................................
Deferred revenue .........................................................................................
Total current liabilities......................................................................................

Deferred income taxes, net ...............................................................................
Stockholders’ equity: 

Preferred stock, $0.01 par value; 2,000 shares authorized; none 

1,876 
4,193 
6,847 
6,292 
19,208 

2,539 

$ 

28,065 
106,120 

5,673 
4,475 
2,205 
146,538 

18,690 
15,144 
43,563 
22,847 
1,277 
248,059 

1,484 
4,640 
8,275 
7,638 
22,037 

1,226 

$ 

$ 

outstanding ..............................................................................................

⎯ 

⎯ 

Common stock, $0.01 par value; 30,000 shares authorized; 18,303 and 

18,674 issued and outstanding as of December 31, 2004 and 2005.........
Additional paid-in capital............................................................................
Accumulated other comprehensive income.................................................
Unearned compensation ..............................................................................
Accumulated deficit ....................................................................................
Total stockholders’ equity ................................................................................
Total liabilities and stockholders’ equity.......................................................... $

183 
283,206 
3,959 
⎯ 
(76,404) 
210,944 
232,691 

187 
295,920 
1,348 
(2,712) 
(69,947) 
224,796 
248,059 

$ 

See accompanying notes. 

F-5 

 
 
 
 
 
 
 
 
 
   
 
 
 
   
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY 
(in thousands) 

Balance at December 31, 2002......

Net income................................... $ 
Foreign currency translation 

Comprehensive    Common Stock 
  Amount
Income (Loss) 
  $  158 
  ⎯ 

   Shares 
  15,810 
  ⎯ 

100 

adjustment .................................

2,419 

Net unrealized loss on  
  short-term investments..............
Comprehensive income ............... $ 
Exercise of stock options.............
Stock issued for acquisitions.......
Stock issued for follow-on 
  public offering, net of offering 
costs...........................................
Balance at December 31, 2003......
  Net income...................................  
  Foreign currency translation 

(23) 
2,496 

        24,985 

adjustment .................................

          1,729 

  Net unrealized loss on  

short-term investments..............
  Comprehensive income ............... $ 

            (166) 
26,548 

⎯ 

⎯ 

395 
5 

1,667 
  17,877 
  ⎯ 

⎯ 

⎯ 

⎯ 

⎯ 

4 
  ⎯ 

17 
  179 
  ⎯ 

⎯ 

⎯ 

Additional
Paid-In 
Capital 
$ 205,348 

⎯ 

⎯ 

⎯ 

8,257 
97 

53,481 
267,183 

⎯ 

⎯ 

⎯ 

  Exercise of stock options.............  
  Release of valuation allowance 
   related to the deferred  tax 
benefit for exercised stock 
options .......................................

  Stock issued for PeerMark 

acquisition .................................
Balance at December 31, 2004......  
  Net income...................................  
  Foreign currency translation 

421 

        4 

    6,293 

⎯ 

⎯ 

  9,523 

5 
  18,303 
  ⎯ 

  ⎯ 
    183 
  ⎯ 

6,457 

adjustment .................................

(2,431) 

  Net unrealized loss on  

short-term investments..............
  Comprehensive income ............... $ 

(180) 
3,846 

  Exercise of stock options.............  
  Deferred tax benefit for 

exercised stock options .............
  Restricted stock............................  
  Amortization of unearned 

compensation.............................

⎯ 

⎯ 

299 

⎯ 
72 

⎯ 

       207 
283,206 

⎯ 

⎯ 

⎯ 

  7,409 

  2,215 
    3,090 

⎯ 

⎯ 

3 

⎯ 
1 

Unearned 

  Compensation 
$

⎯ 
⎯ 

Accumulated 
 Other 
 Comprehensive 
 Income 
⎯ 
⎯ 

$

  Accumulated 
  Deficit 
  $  (101,489) 
100 

  Total 
 Stockholders’ 
  Equity 
104,017 
100 

$

⎯ 

⎯ 

⎯ 
⎯ 

⎯ 
⎯ 
⎯ 

⎯ 

⎯ 

⎯ 

⎯ 

⎯ 
⎯ 
⎯ 

⎯ 

⎯ 

⎯ 

⎯ 
(3,091) 

2,419 

 (23) 

⎯ 
⎯ 

⎯ 
2,396 

⎯ 

       1,729 

         (166) 

⎯ 

⎯ 

⎯ 
       3,959 

⎯ 

(2,431) 

(180) 

⎯ 

⎯ 
⎯ 

⎯ 

⎯ 

⎯ 

⎯ 
⎯ 

⎯ 
  (101,389) 
24,985 

   ⎯ 

 ⎯ 

⎯ 

2,419 

(23) 

8,261 
97 

53,498 
168,369 
24,985 

1,729 

(166) 

6,297 

⎯ 

  9,523 

⎯ 
(76,404) 
6,457 

⎯ 

⎯ 

⎯ 

⎯ 
⎯ 

⎯ 

207 
210,944 
6,457 

(2,431) 

(180) 

7,412 

2,215 
⎯ 

379 

  ⎯ 

    ⎯ 

379 

Balance at December 31, 2005......  

  18,674 

$    187 

$ 295,920

$ 

(2,712) 

$

1,348 

$ 

(69,947) 

$

224,796 

See accompanying notes. 

F-6 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
               
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 

CONSOLIDATED STATEMENTS OF CASH FLOWS 
(in thousands) 

Year Ended December 31, 
2004 

2005 

2003 

100 

  $ 24,985 

  $ 

6,457

Operating activities: 
Net income......................................................................................... $
Adjustments to reconcile net income to net cash provided by 
operating activities: 

Depreciation..............................................................................
Amortization.............................................................................
Income tax (benefit) expense....................................................
Provision for losses on accounts receivable..............................
         Unearned compensation............................................................
Changes in operating assets and liabilities, net of acquisitions: 

Accounts receivable..................................................................
Prepaid expenses and other current assets ................................
Deposits ....................................................................................
Accounts payable and accrued expenses ..................................
Deferred revenue ......................................................................
Net cash provided by operating activities ......................................

4,960 
8,206 
⎯ 
2,078 
⎯ 

885 
659 
(631) 
(2,403) 
(304) 
13,550 

Investing activities: 

Purchases of short-term investments ........................................
Sales of short-term investments................................................
Purchases of property and equipment and other assets.............
Cash held for acquisition ..........................................................
Acquisitions, net of acquired cash ............................................
Net cash used in investing activities ..............................................

(61,823) 
1,592 
(4,257) 
16,386 
(17,419) 
(65,521) 

Financing activities: 

Exercise of stock options ..........................................................
Issuance of common stock, net .................................................
Net cash provided by financing activities ......................................

8,261 
53,498 
61,759 

5,525 
7,485 
(17,052) 
401 
⎯ 

117 
98 
(11) 
3,064 
111 
24,723 

(90,588) 
71,944 
(9,032) 
⎯ 
(2,270) 
(29,946) 

6,297 
⎯ 
6,297 

5,725
5,989
4,245
979
379

(2,652)
(330)
(317)
1,683
761
22,919

  (250,272)
224,234
(8,393)
⎯ 
(4,301)
(38,732)

7,412
⎯
7,412

(341)
(8,742)
36,807
28,065

Effect of foreign currency exchange rates on cash and cash 

309 
equivalents .....................................................................................
10,097 
Net increase (decrease) in cash and cash equivalents ........................
Cash and cash equivalents at beginning of year ................................
25,546 
Cash and cash equivalents at end of year .......................................... $ 35,643 

90 
1,164 
35,643 
  $ 36,807 

  $ 

Supplemental disclosure of non-cash transactions: 
Deferred tax benefit for exercised stock options ............................... $

⎯ 

  $ 9,523 

  $ 

2,215

See accompanying notes. 

F-7 

 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 

December 31, 2005 

1. ORGANIZATION 

CoStar  Group,  Inc.  (the  “Company”)  has  created  a  comprehensive,  proprietary  database  of  commercial  real 
estate information for metropolitan areas throughout the United States and the United Kingdom. Based on its unique 
database, the Company provides information services to the commercial real estate and related business community 
in the United States and the United Kingdom and operates within one business segment. The information services 
are typically distributed to its clients under subscription-based license agreements, which have a minimum term of 
one year and renew automatically. 

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES 

Basis of Presentation 

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. 

All significant intercompany balances have been eliminated in consolidation. 

Use of Estimates 

The  preparation  of  financial  statements  in  conformity  with  accounting  principles  generally  accepted  in  the 
United  States  requires  management  to  make  estimates  and  assumptions  that  affect  the  amounts  reported  in  the 
financial statements and accompanying notes. Actual results could differ from those estimates. 

Reclassifications 

Certain previously reported amounts have been reclassified to conform to the Company’s current presentation.  

Revenue Recognition 

The Company primarily derives revenues from providing access to its proprietary database of commercial real 
estate  information.  The  Company  generally  charges  a  fixed  monthly  amount  for  its  subscription-based  services. 
Subscription contract rates are based on the number of sites, number of users, organization size, the client’s business 
focus and the number of services to which a client subscribes. Subscription-based license agreements typically have 
a minimum term of one year and renew automatically. 

Revenues  from  subscription-based  services  are  recognized  on  a  straight-line  basis  over  the  term  of  the 
agreement.  Deferred  revenue  results  from  advance  cash  receipts  from  customers  or  amounts  billed  in  advance  to 
customers from the sales of subscription licenses and is recognized over the term of the license. 

Cost of Revenues 

Cost of revenues principally consists of salaries and related expenses for the Company’s researchers who collect 
and analyze the commercial real estate data that is the basis for the Company’s information services. Additionally, 
cost  of  revenues  includes  the  cost  of  data  from  third-party  data  sources,  which  is  expensed  as  incurred,  and  the 
amortization of database technology. 

Significant Customers 

No  single  customer  accounted  for  more  than  5%  of  the  Company’s  revenues  for  each  of  the  years  ended 

December 31, 2003, 2004 and 2005. 

F-8 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ⎯ (Continued) 

Foreign Currency Translation 

The  Company’s  functional  currency  in  its  foreign  locations  is  the  local  currency.    Assets  and  liabilities  are 
translated into U.S. dollars as of the balance sheet date.  Revenue, expenses, gains and losses are translated at the 
average  exchange  rates  in  effect  during  each  period.    Gains  and  losses  resulting  from  translation  are  included  in 
accumulated  other  comprehensive  income  (loss).    Net  gains  or  losses  resulting  from  foreign  currency  exchange 
transactions are included in the consolidated statement of operations.  The Company had an increase (decrease) in 
comprehensive  income  (loss)  of  approximately  $1.7  million  and  ($2.4)  million  from  the  translation  of  its  foreign 
subsidiary’s assets and liabilities into U.S. dollars for the years ended December 31, 2004 and 2005, respectively.  
There were no material gains or losses from foreign currency exchange transactions for the years ended December 
31, 2004 and 2005. 

Comprehensive Income 

For the years ended December 31, 2003, 2004 and 2005, total comprehensive income was approximately $2.5 
million, $26.5 million and $3.8 million, respectively. As of December 31, 2005, accumulated other comprehensive 
income (loss) included foreign currency translation adjustments of approximately $1.7 million and unrealized losses 
on short-term investments of approximately ($369,000). 

Advertising Costs 

The  Company  expenses  advertising  costs  as  incurred.  Advertising  expense  was  $354,000,  $584,000  and 

$200,000 for the years ended December 31, 2003, 2004 and 2005, respectively. 

Income Taxes 

The Company provides for income taxes under the provisions of Statement of Financial Accounting Standards 
No. 109 (“SFAS No. 109”). Deferred income taxes result from temporary differences between the tax basis of assets 
and liabilities and the basis reported in the Company’s consolidated financial statements. Deferred tax liabilities and 
assets are determined based on the difference between financial statement and tax basis of assets and liabilities using 
enacted  rates  expected  to  be  in  effect  during  the  year  in  which  the  differences  reverse.  Valuation  allowances  are 
provided against assets, including net operating losses, if it is anticipated that some or all of the asset may not be 
realized through future taxable earnings or implementation of tax planning strategies. 

Net Income Per Share 

Net income per share is computed by dividing net income by the weighted average number of common shares 
outstanding  during  the  period  on  a  basic  and  diluted  basis.  The  Company’s  potentially  dilutive  securities  include 
stock options. Diluted net income per share considers the impact of potentially dilutive securities except in periods 
in which there is a net loss as the inclusion of the potential common shares would have an anti-dilutive effect.  

Stock-Based Compensation 

The Company accounts for its stock-based compensation in accordance with APB No. 25, “Accounting for Stock 
Issued to Employees” (“APB 25”). Under APB 25, compensation expense is based on the difference, if any, on the 
date  of  grant  between  the  fair  value  of  the  Company’s  common  stock  and  the  exercise  price  of  the  option  and  is 
recognized  ratably  over  the  vesting  period  of  the  option.  Stock-based  compensation  related  to  options  granted  to 
non-employees  is  accounted  for  using  the  fair  value  method  in  accordance  with  the  Statement  of  Financial 
Accounting Standard No. 123 “Accounting for Stock-Based Compensation” (“SFAS No. 123”).  

F-9 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ⎯ (Continued) 

Stock-Based Compensation (Continued) 

Statement  of  Financial  Accounting  Standards  No. 148,  “Accounting  for  Stock-Based  Compensation — 
Transition  and  Disclosure,  an  amendment  of  FASB  Statement  No. 123”  (“SFAS No.  148”)  which  amends  the 
disclosure  requirements  of  SFAS 123  to  require  prominent  disclosures  in  both  annual  and  interim  financial 
statements. The Company has adopted the disclosure requirements of SFAS 123 and SFAS 148. The following table 
illustrates  the  effect  on  net  income  and  net  income per  share  as  if  the  Company  had  applied  the  fair  value 
recognition  provisions  of  SFAS 123  to  stock-based  employee  compensation  (in  thousands,  except  per  share 
amounts): 

Year Ended December 31, 
2004 

2003 

2005 

Net income, as reported.............................................................. $
Add: stock-based employee compensation expense included 

in reported net income ...........................................................

Deduct: total stock-based employee compensation expense 

100 

  $

24,985 

  $ 

6,457 

⎯ 

⎯ 

228 

determined under fair value based method for all awards......
Pro forma net income (loss) ....................................................... $

(4,193) 
(4,093) 

  $

(7,599) 
17,386 

  $ 

(3,407) 
3,278 

Net income (loss) per share: 

Basic ⎯ as reported ............................................................... $  
Basic ⎯ pro forma................................................................. $
Diluted ⎯ as reported............................................................ $  
Diluted ⎯ pro forma.............................................................. $

0.01 

  $  

1.38 

(0.25) 

  $       0.96 

0.01 

  $  

(0.25) 

  $  

1.33 

0.92 

  $   

  $   

  $   

  $   

0.35 

0.18 

0.34 

0.17 

Cash and Cash Equivalents 

The Company considers all highly liquid investments purchased with an original maturity of three months or less 
to be cash equivalents. Cash equivalents consist of money market fund investments and United States Government 
Securities. As of December 31, 2004 and 2005, cash of $805,000 and $714,000, respectively, was restricted cash, 
held in accounts to support letters of credit. 

Short-Term Investments 

The  Company  accounts  for  short-term  investments  in  accordance  with  Statement  of  Financial  Accounting 
Standards  (“SFAS  No.  115),  “Accounting  for  Certain  Investments  in  Debt  and  Equity  Securities.”  The  Company 
determines the appropriate classification of investments at the time of purchase and reevaluates such designation as 
of  each  balance  sheet  date.    The  Company  considers  all  of  its  investments  to  be  available-for-sale.    Investments 
consist of commercial paper, government/federal notes and bonds and corporate obligations with maturities greater 
than 90 days at the time of purchase. Available-for-sale investments with contractual maturities beyond one year are 
classified  as  current  in  the  Company’s  consolidated  balance  sheets  because  they  represent  the  investment  of  cash 
that is available for current operations. Investments are carried at fair market value. 

F-10 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ⎯ (Continued) 

Short-Term Investments – (Continued) 

Scheduled  maturities  of  securities  classified  as  available  for  sale  as  of  December  31,  2005  are  as  follows  (in 

thousands): 

Maturity 
Due in: 

   Fair Value 

2006...................................................................................................
2007-2010...........................................................................................  
2011-2015...........................................................................................  
2016 and thereafter.............................................................................  

Mortgage backed with multiple maturities .........................................  
Short-term investments.......................................................................  

$        55,019 
21,948 
954 
501 
78,422 
27,698 
 $     106,120 

Unrealized  holding  gains  and  losses,  net  of  the  related  tax  effect,  on  available-for-sale  securities  are  excluded 
from earnings and are reported as a separate component of other comprehensive income in stockholders’ equity until 
realized.    Realized  gains  and  losses  from  the  sale  of  available-for-sale  securities  are  determined  on  a  specific-
identification basis.    A decline  in  market  value  of  any  available-for-sale  security  below  cost  that  is  deemed  to  be 
other than temporary results in a reduction in carrying amount to fair value.  The impairment is charged to earnings 
and a new cost basis for the security is established.  Dividend and interest income are recognized when earned. 

The  unrealized  losses  on  the  Company’s  investments  as  of  December  31,  2004  and  2005  were  generated 
primarily  from  increases  in  interest  rates.  The  losses  are  considered  temporary,  as  the  contractual  terms  of  these 
investments do not permit the issuer to settle the security at a price less than the amortized cost of the investment. 
Because  the  Company  has  the  ability  to  hold  these  investments  until  a  recovery  of  fair  value,  which  may  be 
maturity, it does not consider these investments to be other-than-temporarily impaired as of December 31, 2004 and 
2005. 

The components of the investments in a loss position for more than twelve months consists of the following (in 

thousands): 

December 31, 

2004 

2005 

Municipal debt securities................ $ 
Federal debt securities ....................   
Corporate debt securities ................  
  $ 

 Aggregate  
 Fair  
 Value  
⎯ 
⎯ 
⎯ 
       ⎯ 

 Gross  
 Unrealized   
 Losses  
$  
⎯ 
              ⎯ 
              ⎯ 

$ 

$ 

       ⎯ 

$  

 Aggregate  
 Fair  
 Value  
       ⎯  
16,428  
2,347 
18,775  

F-11 

 Gross  
 Unrealized  
 Losses  
       ⎯ 
(195) 
(8) 
(203) 

$  

$ 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
  
 
 
 
  
    
 
 
    
 
  
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ⎯ (Continued) 

Short-Term Investments – (Continued) 

The components of the investments in a loss position for less than twelve months consists of the following (in 

thousands): 

December 31, 

2004 

2005 

Municipal debt securities................ $ 
Federal debt securities ....................   
Corporate debt securities ................  
  $ 

 Aggregate  
 Fair  
 Value  
 33,639  
20,324  
 25,485  
79,448 

 Gross  
 Unrealized   
 Losses  
(115) 
(49) 
(27) 
(191) 

$  

$ 

 Aggregate  
 Fair  
 Value  
       ⎯  
8,016  
24,553  
32,569  

$ 

$  

 Gross  
 Unrealized  
 Losses  
       ⎯ 
(43) 
(144) 
(187) 

$  

$ 

The  gross  unrealized  gains  for  the  years  ended  December  31,  2004  and  2005  are  approximately  $2,000  and 

$21,000, respectively.  

During  the  year  ended  December  31,  2005,  the  Company  recognized  in  other  comprehensive  income  net 

unrealized losses on short-term investments of approximately $180,000.   

Concentration of Credit Risk and Financial Instruments 

The Company performs ongoing credit evaluations of its customers’ financial condition and generally does not 
require  that  its  customers’  obligations  to  the  Company  be  secured.  The  Company  maintains  reserves  for  credit 
losses, and such losses have been within management’s expectations. The large size and widespread nature of the 
Company’s customer base and lack of dependence on individual customers mitigate the risk of nonpayment of the 
Company’s  accounts  receivable.  The  carrying  amount  of  the  accounts  receivable  approximates  the  net  realizable 
value. The carrying value of the Company’s financial instruments including cash and cash equivalents, short-term 
investments, accounts receivable, accounts payable, and accrued expenses approximates fair value. 

Property and Equipment 

Property  and  equipment  are  stated  at  cost.  All  repairs  and  maintenance  costs  are  expensed  as  incurred. 
Depreciation and amortization are calculated on the straight-line method over the following estimated useful lives of 
the assets: 

Leasehold improvements 
Furniture and office equipment 
Research vehicles 
Computer hardware and software 

Shorter of lease term or useful life 
Seven years 
Five years 
Two to five years 

Internal use software costs are capitalized in accordance with Statement of Position No. 98-1, “Accounting for 
the Costs of Computer Software Developed or Obtained for Internal Use” (“SOP 98-1”). Qualifying costs incurred 
during  the  application  development  stage,  which  consist  primarily  of  outside  services  and  purchased  software 
license costs, are capitalized and amortized over the estimated useful life of the asset. All other costs are expensed as 
incurred. 

F-12 

 
 
 
 
 
 
 
 
 
  
 
  
  
 
 
    
 
  
    
    
 
 
    
 
 
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ⎯ (Continued) 

Goodwill, Intangibles and Other Assets 

Goodwill  represents  the  excess  of  costs  over  the  fair  value  of  assets  of  businesses  acquired.  Goodwill  and 
intangible assets subject to amortization that arose from acquisitions prior to July 1, 2001, have been amortized on a 
straight-line basis over their estimated useful lives in accordance with Accounting Principles Board Opinion No. 17, 
“Intangible Assets”. The Company adopted the provisions of Statement of Financial Accounting Standards No. 142,  
“Goodwill  and  Other  Intangible  Assets”  (“SFAS  142”),  as  of  January  1,  2002.  Goodwill  and  intangible  assets 
acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but 
instead tested for impairment at least annually in accordance with the provisions of SFAS No. 142. SFAS No. 142 
also requires that intangible assets with estimable useful lives that arose from acquisitions on or after July 1, 2001 be 
amortized  over  their  respective  estimated  useful  lives  using  a  method  of  amortization  that  reflects  the  pattern  in 
which  the  economic  benefits  of  the  intangible  assets  are  consumed  or  otherwise  used  up,  and  reviewed  for 
impairment in accordance with Statement of Financial Accounting Standards No. 144, “Accounting for Impairment 
or Disposal of Long-Lived Assets”.  

Acquired technology, customer base and tradename are related to the Company’s acquisitions (See Notes 3 and 
5). Acquired technology and tradename are amortized on a straight-line basis over periods ranging from two to ten 
years.  The  acquired  intangible  asset  characterized  as  customer  base  consists  of  one  distinct  intangible  asset 
composed  of  acquired  customer  contracts  and  the  related  customer  relationships.  Customer  bases  that  arose  from 
acquisitions  prior  to  July  1,  2001  are  amortized  on  a  straight-line  basis  principally  over  a  period  of  ten  years. 
Customer  bases  that  arose  from  acquisitions  on  or  after  July  1,  2001  are  amortized  on  a  125%  declining  balance 
method over ten years. The cost of capitalized building photography is amortized on a straight-line basis over five 
years. 

Long-Lived Assets 

In accordance with Statement of Financial Accounting Standards No. 144, “Accounting for the Impairment or 
Disposal  of  Long-Lived  Assets”,  long-lived  assets,  such  as  property,  plant,  and  equipment,  and  purchased 
intangibles  subject  to  amortization,  are  reviewed  for  impairment  whenever  events  or  changes  in  circumstances 
indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is 
measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected 
to  be  generated  by  the  asset  or  asset  group.  If  the  carrying  amount  of  an  asset  exceeds  its  estimated  future  cash 
flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair 
value of the asset. Assets to be disposed of would be separately presented in the balance sheet and reported at the 
lower  of  the  carrying  amount  or  fair  value  less  costs  to  sell,  and  would  no  longer  be  depreciated.  The  assets  and 
liabilities of a disposed group classified as held for sale would be presented separately in the appropriate asset and 
liability sections of the balance sheet. 

Goodwill and intangible assets not subject to amortization are tested annually for impairment, and are tested for 
impairment more frequently if events and circumstances indicate that the asset might be impaired. An impairment 
loss is recognized to the extent that the carrying amount exceeds the asset’s fair value. 

F-13 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
COSTAR GROUP, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ⎯ (Continued)  

New Accounting Pronouncements 

In May 2005, the FASB issued SFAS No. 154, “Accounting Changes and Error Corrections—a replacement of 
APB  Opinion  No. 20  and  FASB  Statement  No. 3”  (“SFAS  154”).  SFAS  154  replaces  APB  Opinion  No. 20, 
“Accounting  Changes”  and  SFAS  No. 3  “Reporting  Accounting  Changes  in  Interim  Financial  Statements,”  and 
changes  the  requirements  for  the  accounting  for  and  reporting  of  a  change  in  accounting  principle.  SFAS  154 
requires restatement of prior period financial statements, unless impracticable, for voluntary changes in accounting 
principle. The retroactive application of a change in accounting principle should be limited to the direct effect of the 
change.  Changes  in  depreciation,  amortization  or  depletion  methods  should  be  accounted  for  prospectively  as  a 
change in accounting estimate. Corrections of accounting errors will be accounted for under the guidance contained 
in  APB  Opinion  No. 20.  The  effective  date  of  this  new  pronouncement  is  for  fiscal  years  beginning  after 
December 15, 2005  and  prospective  application  is  required.  The  Company  does  not  expect  the  adoption of  SFAS 
154 to have a material impact on its consolidated financial statements. 

In March 2005, the FASB issued FIN No. 47, “Accounting for Conditional Asset Retirement Obligations – an 
interpretation of FASB Statement No. 143 “Accounting for Asset Retirement Obligations (“SFAS No. 143”)” (“FIN 
47”). FIN 47 clarifies that the term conditional asset retirement obligation as used in SFAS No. 143, refers to a legal 
obligation to perform an asset retirement activity in which the timing and (or) method of settlement are conditional 
on  a  future  event  that  may  or  may  not  be  within  the  control  of  the  entity.  Accordingly,  an  entity  is  required  to 
recognize a liability for the fair value of a conditional asset retirement obligation if the fair value of the liability can 
be  reasonably  estimated.  Any  uncertainty  about  the  amount  and/or  timing  of  future  settlement  should  be  factored 
into  the  measurement  of  the  liability  when  sufficient  information  exists.  The  liability  for  the  conditional  asset 
retirement  obligation should be  recognized when  incurred.  This  Interpretation  also  clarifies  when  an  entity  would 
have sufficient information to reasonably estimate the fair value of an asset retirement obligation. FIN 47 is effective 
for fiscal periods beginning after December 15, 2005.  The Company does not expect the adoption of FIN 47 to have 
a material impact on its consolidated financial statements. 

In  December 2004,  the  Financial  Accounting  Standards  Board  issued  Statement  of  Financial  Accounting 
Standard No. 123 (Revised 2004), “Share-Based Payment” (“SFAS 123R”). Under previous practice, the reporting 
entity could account for share-based payment under the provisions of APB 25 and disclose pro forma share-based 
compensation  as  accounted  for  under  the  provisions  of  SFAS  123.  Under  the  provisions  of  SFAS  123R,  a  public 
entity is required to measure the cost of employee services received in exchange for an award of equity instruments 
based on the grant-date fair value of the award. That cost is recognized over the period during which an employee is 
required to provide service in exchange for the award. SFAS 123R had an effective date for fiscal quarters beginning 
after June 15, 2005. In April 2005, the Securities and Exchange Commission announced the adoption of a new rule 
that delays the effective date of SFAS 123R until January 2006. As such, the Company will adopt its provisions for 
the  fiscal  quarter  beginning  January 1,  2006.  Application  of  this  pronouncement  requires  management  to  make 
significant  judgments  regarding  the  variables  in  an  option  pricing  model,  including  stock  price  volatility  and 
employee  exercise  behavior.  Most  of  these  variables  are  either  highly  dependent  on  the  current  economic 
environment at the date of grant or forward-looking over the expected term of the award. The Company is currently 
evaluating the requirements of SFAS 123R and expects that the adoption of SFAS 123R will have a material impact 
on its consolidated results of operations. The adoption of SFAS 123R will cause the Company to record amounts of 
stock option compensation expense of approximately $3.0 to $4.0 million. 

F-14 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3.  ACQUISITIONS 

During  January  2004,  the  Company  completed  its  review  of  current  information  regarding  the  income  tax 
attributes  and  deferred  taxes  related  to  its  January  2003  acquisition  of  London-based  Property  Intelligence  plc 
(“Property Intelligence”)  recorded deferred income taxes and related goodwill of approximately $3.1 million as a 
result. The results of operations of Property Intelligence have been consolidated with those of the Company since 
the date of acquisition. The operating results of Property Intelligence are not considered material to the consolidated 
financial statements of the Company, and accordingly, pro forma financial information has not been presented for 
this  acquisition.    The  Company  generated  92%  and  8%  of  its  total  revenues  in  the  United  States  and  the  United 
Kingdom, respectively, for the years ended December 31, 2004 and 2005.  As of December 31, 2004, 68% and 32% 
of the Company’s total long-lived assets, which are comprised of property and equipment, goodwill, intangibles and 
other assets, were located in the United States and the United Kingdom, respectively.  As of December 31, 2005, 
73% and 27% of the Company’s total long-lived assets, which are comprised of property and equipment, goodwill, 
intangibles and other assets, were located in the United States and the United Kingdom, respectively. 

On  May  4,  2004,  the  Company  acquired  all  of  the  outstanding  capital  stock  of  Peer  Market  Research,  Inc. 
(“PeerMark”), an online provider of commercial real estate information in Nashville and Memphis, Tennessee, for 
$623,000  in  cash  and  5,318  shares  of  the  Company’s  common  stock  valued  at  approximately  $207,000.    In  the 
second quarter of 2005, the Company paid the former PeerMark shareholders approximately $255,000 in additional 
post-closing cash consideration, pursuant to the PeerMark acquisition agreement. 

 On  June  16,  2004,  our  U.K.  subsidiary,  FOCUS  Information  Limited,  acquired  Scottish  Property  Network 
(“SPN”), a provider of online commercial property information in Scotland.  The Company acquired substantially 
all of the assets of the SPN business, together with all of the outstanding capital stock of SPN, for approximately 
$1.3 million in cash. 

On September 17, 2004, the Company acquired substantially all of the assets of RealComp, Inc. (“RealComp”), 

a local comparable sales information provider in Denver, Colorado, for approximately $350,000 in cash. 

On January 20, 2005, the Company acquired the assets of National Reseach Bureau (“NRB”), a leading provider 
of property information to the shopping center industry, from Claritas Inc. for approximately $4.1 million in cash. 
NRB  has  over  45 years  of  experience  as  a  leading  producer  of  information  to  the  retail  real  estate  industry, 
principally through its Shopping Center Directory and Shopping Center Directory on CD-ROM. 

All of the Company’s acquisitions have been accounted for using purchase accounting.  The purchase price for 
each acquisition was allocated primarily to acquired database technology and customer base.  The acquired database 
technology for each acquisition is being amortized on a straight-line basis over 5 years.  

The  customer  base  for  each  acquisition,  which  consists  of  one  distinct  intangible  asset  composed  of  acquired 
customer contracts and the related customer relationships, is being amortized on a 125% declining balance method 
over 10 years.  Goodwill is not amortized, but is subject to annual impairment tests.  The results of operations of 
PeerMark, SPN, RealComp and NRB have been consolidated with those of the Company since the respective dates 
of  acquisition  and  are  not  considered  material  to  the  consolidated  financial  statements  of  the  Company.  
Accordingly, pro forma financial information has not been presented for any of the acquisitions. 

F-15 

 
 
 
 
 
 
 
 
 
 
4. PROPERTY AND EQUIPMENT 

Property and equipment consists of the following (in thousands): 

Leasehold improvements ..................................................................................... $
Furniture, office equipment and research vehicles...............................................
Computer hardware and software ........................................................................

Accumulated depreciation and amortization ........................................................
Property and equipment, net ................................................................................ $

5. GOODWILL 

Goodwill consists of the following (in thousands): 

December 31, 

2004 

2005 

3,823 
11,899 
20,414 
36,136 
(22,647) 
13,489 

  $ 

4,151 
  12,947 
  19,277 
  36,375 
  (21,231) 
  $  15,144 

December 31, 

2004 

2005 

Goodwill .............................................................................................................. $
Accumulated amortization ...................................................................................
Goodwill, net........................................................................................................ $

53,160 
(11,223) 
41,937 

  $  54,786 
  (11,223) 
  $  43,563 

During  January  2004,  the  Company  completed  its  review  of  current  information  regarding  the  income  tax 
attributes and deferred taxes related to the Property Intelligence plc acquisition and recorded deferred income taxes 
and  related  goodwill  of  approximately  $3.1  million.    In  June  2004,  the  Company  also  recorded  deferred  income 
taxes and related goodwill of approximately $400,000 for the SPN acquisition. The amortization of these identified 
intangible  assets  is  non-deductible  for  income  tax  purposes,  and  as  a  result,  the  Company  realizes  an  income  tax 
benefit  as  the  deferred  income  taxes  are  reduced  in  connection  with  the  related  amortization  of  these  assets  over 
their estimated useful lives.   

The Company recorded goodwill of approximately $96,000 in connection with the PeerMark acquisition in May 
2004 and subsequently adjusted the amount recorded to reflect the post-closing consideration paid to the PeerMark 
Shareholders.  The  Company  recorded  goodwill  of  approximately  $58,000  for  the  RealComp  acquisition  in 
September 2004. 

The Company recorded goodwill of approximately $3.4 million for the NRB acquisition in January 2005.  

During  the fourth quarters of  2004  and 2005,  the  Company  completed  the  annual  impairment  test  of  goodwill 

and concluded that goodwill was not impaired. 

F-16 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

6. INTANGIBLES AND OTHER ASSETS 

Intangibles and other assets consists of the following (dollars in thousands): 

December 31, 
2004 

December 31, 
2005 

  Weighted- 
Average 
Amortization 
Period  
(in years) 

Building photography ....................................
Accumulated amortization .............................
Building photography, net .............................

Acquired database technology .......................
Accumulated amortization .............................
Acquired database technology, net ................

Acquired customer base.................................
Accumulated amortization .............................
Acquired customer base, net ..........................

Acquired tradename .......................................
Accumulated amortization .............................
Acquired tradename, net 

5,253 
(4,552) 
701 

20,259 
(18,323) 
1,936 

43,540 
(20,667) 
22,873 

4,198 
(2,051) 
2,147 

5,922 
(4,853) 
1,069 

20,626 
(19,096) 
1,530 

43,324 
(24,804) 
18,520 

4,198 
(2,470) 
1,728 

Intangibles and other assets, net..................... $ 

27,657 

$

22,847 

5 

4 

10 

10 

Amortization  expense  for  intangibles  and  other  assets  was  approximately  $8.3  million,  $7.5  million  and  $6.0 

million for the years ended December 31, 2003, 2004 and 2005, respectively. 

In  the  aggregate,  amortization  for  intangibles  and  other  assets  existing  as  of  December  31,  2005  for  future 
periods is expected to be approximately $5.5 million, $5.0 million, $4.8 million, $3.2 million and $1.4 million for 
the years ending December 31, 2006, 2007, 2008, 2009 and 2010, respectively. 

F-17 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

7. INCOME TAXES 

The components of the provision (benefit) for income taxes attributable to operations consist of the following (in 

thousands): 

Current: 

Year Ended December 31, 
2004 

2003 

2005 

Federal ................................................................................... $
State .......................................................................................
Foreign...................................................................................
Total current...............................................................................
Deferred: 

Federal ...................................................................................
State .......................................................................................
Foreign...................................................................................
Total deferred.............................................................................
Total provision (benefit) for income taxes ................................. $

77 
205 
⎯ 
282 

⎯ 
⎯ 
⎯ 
⎯ 
282 

  $

  $ 

105 
22 
⎯ 
127 

(13,361) 
(2,764) 
(927) 
(17,052) 
  $ (16,925) 

  $ 

227 
57 
⎯ 
284 

4,018 
746 
(708) 
4,056 
4,340 

The components of deferred tax assets and liabilities consists of the following (in thousands): 

Deferred tax assets: 
Reserve for bad debts ........................................................................................... $
Accrued compensation .........................................................................................
Net operating losses .............................................................................................
Restructuring reserve ...........................................................................................
Other liabilities.....................................................................................................
Total deferred tax assets .............................................................................

December 31, 

2004 

2005 

422 
611 
28,491 
⎯ 
1,365 
30,889 

  $ 

523 
1,346 
  24,213 
390 
1,756 
  28,228 

Deferred tax liabilities: 
Prepaids................................................................................................................
Depreciation .........................................................................................................
Identified intangibles associated with purchase accounting.................................
Total deferred tax liabilities........................................................................

(298) 
18 
(6,937) 
(7,217) 

(498) 
(329) 
(4,775) 
(5,602) 

Net deferred tax asset ...........................................................................................
Valuation allowance.............................................................................................
Net deferred taxes ................................................................................................ $

23,672 
(547) 
23,125 

  22,626 
(687) 
  $  21,939 

The net  long-term  deferred  tax  liability  shown on  the balance  sheet  includes deferred  tax  liabilities  and assets 

related to the U.K operations of the company.  

F-18 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

7. INCOME TAXES ⎯ (Continued) 

The  total  net  deferred  tax  asset  of  approximately  $23.2  million  shown  on  the  balance  sheet  includes  the  tax 
liabilities and assets related to the U.S. operations of the Company. The net deferred tax liability related to the U.K 
operations is shown separately because the U.K. operations are subject to a separate taxing jurisdiction. 

For the year ended December 31, 2005, a valuation allowance has been established primarily for certain state net 
operating  loss  carryforwards  due  to  the  uncertainty  of  realization.  For  the  year  ended  December  31,  2004, 
management  determined  that  because  of  the  continuing  improvement  of  operating  results  and  the  Company’s 
outlook for the future it was more likely than not that the Company would realize approximately $23.1 million of its 
net deferred tax assets through future taxable earnings. A valuation allowance continued to be established for certain 
state net operating loss carryforwards due to the uncertainty of realization. Approximately $9.5 million of the release 
of the valuation allowance was recorded directly to additional paid-in capital as the related deferred tax asset was 
generated from the exercise of employee stock options.  

The Company’s change in valuation allowance was approximately $(27.6) million and $140,000 during the years 
ended  December  31,  2004  and  2005,  respectively.    For  the  year  ended  December  31,  2005,  the  Company  had 
income of approximately $13.3 million subject to applicable U.S. federal and state income tax laws and a loss of 
approximately $2.5 million subject to applicable U.K. tax laws.     

The Company’s provision for income taxes resulted in effective tax rates that varied from the statutory federal 

income tax rate as follows (in thousands): 

Year Ended December 31, 
2004 

2003 

2005 

Expected federal income tax (benefit) provision at 34% ........... $
State income taxes, net of federal benefit...................................
Foreign income taxes, net effect ................................................
Increase (decrease) in valuation allowance ................................
Other adjustments ......................................................................
Income tax expense (benefit) ..................................................... $

130 
304 
98 
(678) 
428 
282 

  $

2,847 
353 
76 
(20,057) 
(144) 
  $ (16,925) 

  $ 

  $ 

3,670 
533 
139 
3 
(5) 
4,340 

The  Company  paid  approximately  $184,000,  $112,000  and  $95,000  in  income  taxes  for  the  years  ended 

December 31, 2003, 2004 and 2005, respectively. 

At  December 31,  2005,  the Company  has net  operating  loss  carryforwards for federal  income  tax  purposes of 
approximately $63.0 million, which expire, if unused, from the year 2013 through the year 2023. The Company has 
net operating loss carryforwards for U.K. income tax purposes of approximately $3.4 million, which do not expire. 
The Company also has alternative minimum tax credit carryforwards of approximately $425,000. 

F-19 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

8. COMMITMENTS AND CONTINGENCIES 

The  Company  leases  office  facilities  and  office  equipment  under  various  noncancelable  operating  leases.  The 
leases contain various renewal options. Rent expense for the years ended December 31, 2003, 2004 and 2005 was 
approximately $5.7 million, $6.1 million and $6.8 million, respectively. 

Future minimum lease payments as of December 31, 2005 are as follows (in thousands): 

2006............................................................................................ $
2007............................................................................................
2008............................................................................................
2009............................................................................................
20010..........................................................................................
2011 and thereafter.....................................................................

$

7,217 
6,652 
5,408 
4,685 
  1,996 
2,509 
28,467 

Currently, and from time to time, the Company is involved in litigation incidental to the conduct of its business.  
The  Company  is  not  a  party  to  any  lawsuit  or  proceeding  that,  in  the  opinion  of  management,  is  likely  to  have  a 
material adverse effect on its financial position or results of operations. 

9.  RESTRUCTURING CHARGES 

Effective July 21, 2005, the Company closed its research center in Mason, Ohio (the “Mason Operations”). The 
closing of the Mason Operations resulted in a one-time pre-tax restructuring charge of approximately $2.2 million 
recorded in the third quarter of 2005. The third quarter restructuring charge included amounts for wages, severance, 
occupancy  and  other  costs.  Below  is  a  summary  of  the  expense  recorded  and  the  activity  related  to  restructuring. 
The  estimates  have  been  made  based  upon  management’s  best  estimate  of  amounts  and  timing  of  certain  events 
included in the restructuring plan that will occur in the future. It is possible that the actual outcome of certain events 
may differ from estimates. Changes will be made to the restructuring accrual at the point that any such differences 
become determinable. 

Restructuring expenses (in thousands): 

Original Charge 

2005 charges 
utilized 

  Accrual balance 
as of December 
31, 2005 

Occupancy ..................................................... $ 
Wages, severance, and other costs .................
Total restructuring charge .............................. $ 

1,355 
862 
2,217 

$

$

382 
798 
1,180 

$ 

$ 

 973 
 64 
1,037 

F-20 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

10.  STOCKHOLDERS’ EQUITY  

Preferred Stock 

The Company has 2,000,000 shares of preferred stock, $0.01 par value, authorized for issuance. The Board of 

Directors may issue the preferred stock from time to time as shares of one or more classes or series. 

Common Stock 

The Company has 30,000,000 shares of common stock, $0.01 par value, authorized for issuance. Dividends may 
be  declared  and  paid  on  the  common  stock,  subject  in  all  cases  to  the  rights  and  preferences  of  the  holders  of 
preferred  stock  and  authorization  by  the  Board  of  Directors.  In  the  event  of  liquidation  or  winding  up  of  the 
Company  and  after  the  payment  of  all  preferential  amounts  required  to  be  paid  to  the  holders  of  any  series  of 
preferred stock, any remaining funds shall be distributed among the holders of the issued and outstanding common 
stock. 

11.  NET INCOME PER SHARE 

The following table sets forth the calculation of basic and diluted net income per share (in thousands except per 

share amounts): 

Numerator: 

Year Ended December 31, 
2004 

2003 

2005 

Net income............................................................................. $

100 

  $

24,985 

  $ 

6,457 

Denominator: 

Denominator for basic net income per share ⎯ weighted-

average outstanding shares.................................................

16,202 

18,165 

18,453 

Effect of dilutive securities: 

Stock options and warrants ....................................................
Denominator for diluted net income per share ⎯ weighted-
average outstanding shares.................................................

472 

662 

554 

16,674 

18,827 

19,007 

Net income per share ⎯ basic.................................................... $  
Net income per share ⎯ diluted................................................. $  

0.01 

0.01 

  $       1.38 

  $       1.33 

  $ 

  $ 

0.35 

0.34 

Stock  options  and  warrants  to  purchase  approximately  1,450,000  shares  were  outstanding  as  of  December  31, 
2003, but were not included in the computation of diluted earnings per share because the exercise price of the stock 
options was greater than the average share price of the common shares and, therefore, the effect would have been 
anti-dilutive. Stock options to purchase approximately 1,188,000 shares were outstanding as of December 31, 2004, 
but  were  not  included  in  the  computation  of  diluted  earnings  per  share  because  the  exercise  price  of  the  stock 
options was greater than the average share price of the common shares and, therefore, the effect would have been 
anti-dilutive. Stock options to purchase approximately 921,000 were outstanding as of December 31, 2005, but were 
not  included  in  the  computation  of diluted  earnings per  share because  the  exercise price  of  the  stock  options was 
greater than the average share price of the common shares and, therefore, the effect would have been anti-dilutive. 

F-21 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

12. EMPLOYEE BENEFIT PLANS 

Stock Incentive Plan  

In June 1998 the Company’s Board of Directors adopted the 1998 Stock Incentive Plan (the “1998 Plan”) prior to 
consummation  of  the  Company’s  initial  public  offering.  The  1998  Plan  provides  for  the  grant  of  stock  and  stock 
options to officers, directors and employees of the Company and its subsidiaries. Options granted under the 1998 
Plan may be incentive or non-qualified stock options. The exercise price for an incentive stock option may not be 
less  than  the  fair  market  value  of  the  Company’s  common  stock  on  the  date  of  grant.  The  vesting  period  of  the 
options  and  restricted  stock  grants  is  determined  by  the  Board  of  Directors  and  is  generally  four  years.  Upon  the 
occurrence of a Change of Control, as defined in the 1998 Plan, all outstanding unexercisable options and restricted 
stock grants under the 1998 Plan immediately become exercisable. The Company has reserved 3,750,000 shares of 
common stock for issuance under the 1998 Plan. Unless terminated sooner by the Board of Directors, the 1998 Plan 
will terminate in 2008.  Approximately 413,000 and 440,000 shares were available for future grant under the 1998 
Plan as of December 31, 2004 and 2005, respectively. 

Option activity was as follows:  

  Outstanding at December 31, 2002 ...............
Granted....................................................
Exercised.................................................
Canceled or expired.................................
  Outstanding at December 31, 2003 ...............
Granted....................................................
Exercised.................................................
Canceled or expired.................................
  Outstanding at December 31, 2004 ...............
Granted....................................................
Exercised.................................................
Canceled or expired.................................
  Outstanding at December 31, 2005 ...............

Number of 
Shares 
2,097,273 
476,500 
(397,834) 
(254,613) 
1,921,326 
487,000 
(424,166) 
(133,826) 
1,850,334 
10,000 
(292,474) 
(93,963) 
1,473,897 

Range of 
Exercise Price 
$  3.45 - $52.13 
$16.27 - $42.10 
$  8.50 - $38.46 
$16.00 - $52.13 
$  3.45 - $52.13 
$39.00 - $45.18 
$  3.45 - $37.13 
$16.13 - $44.86 
$  9.00 - $52.13  
$43.17 - $43.17 
$  9.00 - $44.86 
$17.25 - $45.18 
$  9.00 - $52.13 

Weighted-
Average 
Exercise Price 
$22.00 
$26.09 
$20.99 
$25.75 
$22.72 
$41.67 
$14.84 
$27.25 
$29.21 
$43.17 
$25.34 
$33.68 
$29.76 

Exercisable at December 31, 2003................
Exercisable at December 31, 2004................
Exercisable at December 31, 2005................

940,477 
886,494 
960,454 

$  3.45 - $52.13 
$  9.00 - $52.13 
$  9.00 - $52.13 

$21.63 
$25.99 
$27.04 

For the purposes of the disclosure required by FAS 123, the fair value of each option granted during the years 

ended December 2003, 2004 and 2005 was $18.21, $28.90 and $26.65 respectively.  

F-22 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

12. EMPLOYEE BENEFIT PLANS (continued) 

Stock Incentive Plan (continued) 

The  Company  estimated  the  fair  value  of  each  option  granted  on  the  date  of  grant  using  the  Black-Scholes 

option-pricing model, using the assumptions noted in the following table: 

         Year Ended December 31, 
2005 

2003 

2004 

Dividend yield...............................................................................
Expected volatility ........................................................................
Risk-free interest rate ....................................................................
Expected life (in years) .................................................................

0% 
  70% 
  3.0% 
5 

0% 
  67% 
  3.6% 
5 

0% 
    64% 
    4.4% 

5 

Pro forma compensation expense for stock option plans would reduce the Company’s net income as described in 

the “Summary of Significant Accounting Policies” as required by SFAS No. 148. 

The following table summarizes information regarding options outstanding at December 31, 2005: 

Options Outstanding 

Options Exercisable 

Range of 
Exercise Price 

Number of 
Shares 

  Weighted-Average 
Remaining 
Contractual Life 
(in years) 

Weighted-Average 
Exercise Price 

Number of 
Shares 

Weighted-Average 
Exercise Price 

  $  9.00 - $18.06   
  $18.12 - $20.30   
  $20.32 - $25.01   
  $25.12 - $29.00   
  $30.00 - $30.00   
  $30.06 - $31.50   
  $32.00 - $39.53   
  $39.81 - $44.86   
  $45.18 - $46.81   
  $52.13 - $52.13   

199,176   
193,286   
149,245   
127,475   
180,000   
156,026   
182,939   
186,750   
98,000   
1,000   
1,473,897   

5.2 
6.5 
5.5 
6.9 
3.3 
6.1 
7.7 
8.1 
8.8 
4.2 
6.3 

$16.25 
19.28 
23.63 
27.84 
30.00 
30.45 
38.92 
43.19 
45.23 
52.13 
29.76 

180,551 
129,348 
119,745 
82,225 
180,000 
108,024 
61,437 
61,624 
36,500 
1,000 
960,454 

$16.10 
19.34 
23.94 
27.67 
30.00 
30.62 
38.38 
43.05 
45.31 
52.13 
27.04 

On  September  28,  2001,  the  Company  granted  a  total  of  5,000  shares  of  restricted  stock  to  the  non-employee 
directors  of  the  Company.  The  stock  grants  vest  over  a  four-year  period  with  25%  of  the  stock  vesting  on  each 
anniversary of the grant date. The Company recorded $89,800 in unearned compensation expense during the year 
ended December 31, 2001 in connection with these stock grants. The unearned compensation was calculated at the 
fair value on the grant date and is being amortized over the vesting period of the restricted stock. 

On March 10, 2005, the Company granted 35,632 shares of restricted stock to officers of the Company under the 
1998  Plan.  The  shares  vest  in  annual  equal  installments  over  four  years  from  the  date  of  grant.  The  Company 
recorded  $1.4  million  of  unearned  compensation  expense  relating  to  the  issuance  of  the  restricted  stock.  The 
unearned compensation expense is amortized on a straight-line basis over the four-year vesting period.    

F-23 

 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
   
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
     
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ⎯ (Continued) 

COSTAR GROUP, INC. 

12. EMPLOYEE BENEFIT PLANS (continued) 

Stock Incentive Plan (continued) 

On September 8, 2005, the Company granted 30,380 shares of restricted stock to employees of the Company 

under the  1998 Plan. The shares vest in annual equal installments over four years from the date of grant. The 
Company recorded $1.4 million of unearned compensation expense relating to the issuance of the restricted stock. 
The unearned compensation expense is amortized on a straight-line basis over the four year vesting period.    

On October 18, 2005, the Company granted 11,286 shares of restricted stock to non-employee members of the 
board of directors of the Company under the Company’s 1998 Stock Incentive Plan. The shares vest in annual equal 
installments  over  four  years  from  the  date  of  grant.  The  Company  recorded  $505,000  of  unearned  compensation 
expense  relating  to  the  issuance  of  the  restricted  stock.  The  unearned  compensation  expense  is  amortized  on  a 
straight-line basis over the four year vesting period.    

The weighted average per share grant date fair value of 81,338 restricted shares granted to employees and non-
employees in the year ended December 31, 2005 was $42.11.  There were no restricted shares granted in the year 
ended December 31, 2004. 

Employee 401(k) Plan  

The  Company  maintains  a 401(k) Plan (the  “401(k)”)  as  a  defined  contribution retirement  plan  for all  eligible 
employees.  The 401(k) provides for tax-deferred contributions of employees’ salaries, limited to a maximum annual 
amount as  established by  the  Internal  Revenue  Service.  The  Company  matched 100%  in 2003,  2004  and 2005 of 
employee contributions up to a maximum of 6% of total compensation. Amounts contributed to the 401(k) by the 
Company  to  match  employee  contributions  for  the  years  ended  December  31,  2003,  2004  and  2005  were 
approximately $1.4 million, $1.2 million and $1.6 million, respectively. The Company paid administrative expenses 
of  approximately  $28,000,  $20,000  and  $18,000  for  the  years  ended  December  31,  2003,  2004  and  2005 
respectively. 

Employee Pension Plan 

The Company maintains a company personal pension plan for all eligible employees in the Company’s London, 
England  office.    The  plan  is  a  defined  contribution  plan.  Employees  are  eligible  to  contribute  a  portion  of  their 
salaries,  subject  to  a  maximum  annual  amount  as  established  by  the  Inland  Revenue.  The  Company  contributes  a 
match subject to the percentage of the employees’ contribution. Amounts contributed to the plan by the Company to 
match employee contributions for the years ended December 31, 2004 and 2005 were approximately $146,000 and 
$175,000, respectively. 

F-24 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
SUBSIDIARIES OF THE REGISTRANT 

EXHIBIT 21.1 

     a) CoStar Realty Information, Inc., a Delaware corporation 

     b) CoStar Limited, a U.K. company 

     c) FOCUS Information Limited, a U.K. company 

d) National Research Bureau, Inc., a Delaware corporation

 
 
 
 
 
 
 
 
 
 
 
 
Consent of Independent Registered Public Accounting Firm 

EXHIBIT 23.1 

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-45770) pertaining 
to the 1998 Stock Incentive Plan of CoStar Group, Inc. of our reports dated February 15, 2006 with respect to the 
consolidated  financial  statements  of  CoStar  Group,  Inc.,  CoStar  Group,  Inc.  management’s  assessment  of  the 
effectiveness  of  internal  control  over  financial  reporting,  and  the  effectiveness  of  internal  control  over  financial 
reporting of CoStar Group, Inc., included in this Annual Report (Form 10-K) for the year ended December 31, 2005. 

 Ernst & Young LLP 

McLean, Virginia 
February 15, 2006 

 
 
 
 
 
 
 
 
 
 
 
EXHIBIT 31.1 

CERTIFICATION 

I, Andrew C. Florance, certify that:  

1.  I have reviewed this annual report on Form 10-K of CoStar Group, Inc.;  

2.  Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to 
state  a  material  fact  necessary  to  make  the  statements  made,  in  light  of  the  circumstances  under  which  such 
statements were made, not misleading with respect to the period covered by this annual report;  

3. Based on my knowledge, the financial statements, and other financial information included in this annual report, 
fairly present in all material respects the financial condition, results of operations and cash flows of the registrant 
as of, and for, the periods presented in this annual report;  

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls 
and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial 
reporting (as defined in Exchange Act Rule 13(a)-15(f) and 15(d)-15(f)) for the registrant and we have: 

a)  Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be 
designed under our supervision, to ensure that material information relating to the registrant, including its 
consolidated  subsidiaries,  is  made  known  to  us  by  others  within  those  entities,  particularly  during  the 
period in which this annual report is being prepared; 

(b)  Designed  such  internal  control  over  financial  reporting,  or  caused  such  internal  control  over  financial 
reporting to be designed under our supervision, 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; 

(c)  Evaluated  the  effectiveness  of  the  registrant’s  disclosure  controls  and  procedures  and  presented  in  this 
annual report our conclusions about the effectiveness of the disclosure controls and procedures, as of the 
end of the period covered by this report based on such evaluation; and 

(d)  Disclosed in this annual report any change in the registrant’s internal control over financial reporting that 
occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case 
of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s 
internal control over financial reporting; and 

5.  The  registrant’s  other  certifying  officers  and  I  have  disclosed,  based  on  our  most  recent  evaluation  of  internal 
control  over  financial  reporting,  to  the  registrant’s  auditors  and  the  audit  committee  of  registrant’s  board  of 
directors (or persons performing the equivalent function): 

a)  All  significant  deficiencies  and  material  weaknesses  in  the  design  or  operation  of  internal  control  over 
financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, 
summarize and report financial information; and 

b)  Any fraud, whether or not material, that involves management or other employees who have a significant 

role in the registrant’s internal control over financial reporting. 

Date: March 6, 2006 

By: 

/S/ Andrew C. Florance 
Andrew C. Florance 
Chief Executive Officer 
(Principal Executive Officer and 
Duly Authorized Officer) 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT 31.2 

CERTIFICATION 

I, Frank A. Carchedi, certify that:  

1.  I have reviewed this annual report on Form 10-K of CoStar Group, Inc.;  

2.  Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to 
state  a  material  fact  necessary  to  make  the  statements  made,  in  light  of  the  circumstances  under  which  such 
statements were made, not misleading with respect to the period covered by this annual report;  

3. Based on my knowledge, the financial statements, and other financial information included in this annual report, 
fairly present in all material respects the financial condition, results of operations and cash flows of the registrant 
as of, and for, the periods presented in this annual report;  

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls 
and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial 
reporting (as defined in Exchange Act Rule 13(a)-15(f) and 15(d)-15(f)) for the registrant and we have: 

a)  Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be 
designed under our supervision, to ensure that material information relating to the registrant, including its 
consolidated  subsidiaries,  is  made  known  to  us  by  others  within  those  entities,  particularly  during  the 
period in which this annual report is being prepared; 

b)  Designed  such  internal  control  over  financial  reporting,  or  caused  such  internal  control  over  financial 
reporting to be designed under our supervision, 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; 

c)  Evaluated  the  effectiveness  of  the  registrant’s  disclosure  controls  and  procedures  and  presented  in  this 
annual report our conclusions about the effectiveness of the disclosure controls and procedures, as of the 
end of the period covered by this report based on such evaluation; and 

d)  Disclosed in this annual report any change in the registrant’s internal control over financial reporting that 
occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case 
of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s 
internal control over financial reporting; and 

5.  The  registrant’s  other  certifying  officers  and  I  have  disclosed,  based  on  our  most  recent  evaluation  of  internal 
control  over  financial  reporting,  to  the  registrant’s  auditors  and  the  audit  committee  of  registrant’s  board  of 
directors (or persons performing the equivalent function): 

a)  All  significant  deficiencies  and  material  weaknesses  in  the  design  or  operation  of  internal  control  over 
financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, 
summarize and report financial information; and 

b)  Any fraud, whether or not material, that involves management or other employees who have a significant 

role in the registrant’s internal control over financial reporting. 

Date: March 6, 2006 

By: 

/S/ Frank A. Carchedi 
Frank A. Carchedi 
Chief Financial Officer 
(Principal Financial and Accounting 
Officer and Duly Authorized Officer) 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT 32.1 

CoStar Group, Inc. 
2 Bethesda Metro Center, 10th floor 
Bethesda, MD 20814 

March 6, 2006 

Securities and Exchange Commission 
450 5th Street, NW 
Washington, DC 20549 

Re:  Certification Of Principal Executive Officer Pursuant To 18 U.S.C. Sec. 1350 

Dear Ladies and Gentlemen:  

In connection with the accompanying Annual Report on Form 10-K of CoStar Group, Inc., for the year ended 
December 31, 2005, I, Andrew C. Florance, Chief Executive Officer of CoStar Group, Inc., hereby certify pursuant 
to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: 

1)  such  Annual  Report  on  Form  10-K  of  CoStar  Group,  Inc.,  for  the  year  ended  December  31,  2005,  fully 

complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 

2)  the  information  contained  in  such  Annual  Report  on  Form  10-K  of  CoStar  Group,  Inc.,  for  the  year  ended 
December  31,  2005,  fairly  presents,  in  all  material  respects,  the  financial  condition  and  results  of  operations  of 
CoStar Group, Inc. 

By: 

/S/ Andrew C. Florance 
Andrew C. Florance 
Chief Executive Officer 
(Principal Executive Officer and 
Duly Authorized Officer) 

A  signed  original  of  this  written  statement  required  by  Section  906,  or  other  document  authenticating, 
acknowledging or otherwise adopting the signature that appears in typed form within the electronic version of this 
written statement required by Section 906, has been provided to CoStar Group, Inc. and will be retained by CoStar 
Group, Inc. and furnished to the Securities and Exchange Commission or its staff upon request. 

In accordance with Item 601 of Regulation S-K, this certification is being “furnished” as Exhibit 32.1 to CoStar 
Group, Inc.’s annual report and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange 
Act  of  1934  (the  “Exchange  Act”)  or  otherwise  subject  to  the  liabilities  of  that  section,  nor  shall  it  be  deemed 
incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set 
forth by specific reference in such a filing. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT 32.2 

CoStar Group, Inc. 
2 Bethesda Metro Center, 10th floor 
Bethesda, MD 20814 

March 6, 2006 

Securities and Exchange Commission 
450 5th Street, NW 
Washington, DC 20549 

Re: Certification Of Principal Financial Officer Pursuant To  18 U.S.C. Sec. 1350 

Dear Ladies and Gentlemen: 

In connection with the accompanying Annual Report on Form 10-K of CoStar Group, Inc., for the year ended 
December 31, 2005, I, Frank A. Carchedi, Chief Financial Officer of CoStar Group, Inc., hereby certify pursuant to 
18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: 

1)  such  Annual  Report  on  Form  10-K  of  CoStar  Group,  Inc.,  for  the  year  ended  December  31,  2005,  fully 

complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 

2)  the  information  contained  in  such  Annual  Report  on  Form  10-K  of  CoStar  Group,  Inc.,  for  the  year  ended 
December  31,  2005,  fairly  presents,  in  all  material  respects,  the  financial  condition  and  results  of  operations  of 
CoStar Group, Inc. 

By: 

/S/ Frank A. Carchedi 
Frank A. Carchedi 
Chief Financial Officer 
(Principal Financial and Accounting 
Officer and Duly Authorized Officer) 

A  signed  original  of  this  written  statement  required  by  Section  906,  or  other  document  authenticating, 
acknowledging or otherwise adopting the signature that appears in typed form within the electronic version of this 
written statement required by Section 906, has been provided to CoStar Group, Inc. and will be retained by CoStar 
Group, Inc. and furnished to the Securities and Exchange Commission or its staff upon request. 

In accordance with Item 601 of Regulation S-K, this certification is being “furnished” as Exhibit 32.2 to CoStar 
Group, Inc.’s annual report and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange 
Act  of  1934  (the  “Exchange  Act”)  or  otherwise  subject  to  the  liabilities  of  that  section,  nor  shall  it  be  deemed 
incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set 
forth by specific reference in such a filing. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
T
N
E
M
E
L
P
P
U
S

12A

Supplement to the CoStar Group 2005 Annual Report
Reconciliation of Quarterly EBITDA with 2004-2005 Quarterly Net Income
($’s in millions)

2004

2005

Q1

Q2

Q3

Q4

Net income

$1.5 

$1.7 

$2.4 

$19.4 

Purchase amortization

Depreciation and other amortization

1.7 

1.5 

1.8 

1.4 

1.7 

1.4 

1.6 

1.7 

Q1

$1.0 

1.6 

1.6 

Q2

$1.1 

1.5 

1.5 

Q3

Q4

$1.1 

$3.2 

1.3 

1.4 

1.4 

1.5 

Interest income, net

(0.2)

(0.3)

(0.3)

(0.5)

(0.6)

(0.7)

(0.9)

(1.2)

Income tax expense (benefit)

-   

-   

(0.1)

(16.7)

0.6 

0.8 

0.8 

2.1 

EBITDA

$4.5 

$4.6 

$5.1 

$5.5 

$4.2 

$4.2 

$3.7 

$7.0 

Michael R. Klein

Andrew C. Florance*

David Bonderman

Warren H. Haber

Josiah O. Low, III

Christopher J. Nassetta

Catherine B. Reynolds 

Jonathan Bray

Frank A. Carchedi*

Jonathan Coleman

Craig S. Farrington*

Jennifer L. Kitchen

Frank Simuro

Henry Stoever

Chris Tully*

Dean L. Violagis

Shareholder Information:

Corporate Information:

Stock Listing: 
Symbol: CSGP, NASDAQ® Listed

Investor Relations:
Henry Stoever
CoStar Group, Inc.
2 Bethesda Metro Center
Bethesda, MD 20814
(301) 215-8336

Transfer Agent and Registrar:
American Stock Transfer & Trust Co.
59 Maiden Lane
New York, NY 10038
(800) 937-5449

Independent Auditors:
Ernst & Young LLP
8484 Westpark Drive
McLean, VA 22102

Corporate Office:
CoStar Group, Inc.
2 Bethesda Metro Center
Bethesda, MD 20814
(800) 204-5960

Web Site:  
www.costar.com

This report contains “forward-looking statements.”
Please review the section entitled “Risk Factors” in the
enclosed Form 10-K for potential factors that could
cause actual results to differ materially from these for-
ward-looking statements. All forward-looking state-
ments are based on information available to us on the
date of this report, and we assume no obligation to
update such statements.

Directors:

Michael R. Klein 
Chairman of the Board, CoStar Group, Inc.,
and Chairman of the Board of 
The Sunlight Foundation

Andrew C. Florance* 
President & Chief Executive Officer,
CoStar Group, Inc.

David Bonderman 
Founding Partner, Texas Pacific Group

Warren H. Haber 
Chairman of the Board & Chief
Executive Officer, Founders Equity Inc.

Josiah O. Low, III 
Venture Partner, Catterton Partners IV L.P.

Christopher J. Nassetta 
President & Chief Executive Officer, 
Host Marriott Corp.

Catherine B. Reynolds  
Chairman & Chief Executive Officer, 
The Catherine B. Reynolds Foundation
and EduCap, Inc.

Officers/
Key Employees:

Jonathan Bray 
Managing Director, Property
Intelligence Limited

Frank A. Carchedi* 
Chief Financial Officer & Treasurer

Jonathan Coleman 
General Counsel & Secretary

Craig S. Farrington* 
Vice President, Research

Andrew C. Florance*
President & Chief Executive Officer

Jennifer L. Kitchen 
Vice President, Field Research

Frank Simuro 
Senior Vice President, Information
Systems 

Henry Stoever 
Vice President, Marketing

Christopher R. Tully* 
Senior Vice President, Sales &
Customer Service

Dean L. Violagis 
Vice President, Research

*Denotes CoStar Executive Officer

CoStar Group  |  2005 Annual Report

CoStar Group, Inc.
2 Bethesda Metro Center
Bethesda, MD 20814

877-7-COSTAR

www.costar.com

©2006 CoStar Realty Information, Inc.

CoStar Group, CoStar Property Professional, CoStar Property Express, CoStar
Tenant, CoStar Exchange, CoStar COMPS Professional, CoStar COMPS Express, 
CoStar Connect, CoStar Commercial MLS and CoStar Photo Express are 
trademarks of CoStar Realty Information, Inc.