PRESS RELEASE DETAIL


Dec 21, 2007

CoStar Signs The Staubach Company to 4-Year, Multi-Market

2005-05-03 2005 CoStar Signs The Staubach Company to 4-Year, Multi-Market

BETHESDA, MD -- CoStar Group, Inc. (NASDAQ: CSGP) today announced that The S...

2005-05-03 2005 CoStar Signs The Staubach Company to 4-Year, Multi-Market

BETHESDA, MD -- CoStar Group, Inc. (NASDAQ: CSGP) today announced that The Staubach Co., a leading global real estate advisory firm, is extending its relationship with CoStar under a new four-year license agreement.

This current renewal is The Staubach Company's second successive multi-year, multi-market license agreement with CoStar. Under the agreement, Staubach Company professionals in 33 offices throughout the U.S. will have access to CoStar's comprehensive office, industrial and retail property information, and CoStar's nationwide inventory of for-sale listings.

"We are pleased to continue and grow our long-term association with one of the industry's premier global advisory firms," stated CoStar Group President & CEO Andrew C. Florance. "We appreciate the confidence they have shown in us and value their continued support."

The agreement also provides options for The Staubach Company to add additional users and services, as well as subscribe to additional markets as CoStar's expansion markets come online.

About CoStar Group, Inc.

CoStar Group, Inc., (NASDAQ: CSGP) is the leading provider of information services to commercial real estate professionals in the United States and the United Kingdom. CoStar's suite of services offers customers access via the Internet to the most comprehensive database of commercial real estate information on over 55 U.S. markets, London and the United Kingdom. Based in Bethesda, MD, the company has approximately 1,000 employees throughout the United States and the United Kingdom, including the largest professional research organization in the industry.

This news release includes "forward-looking statements" including, without limitation, statements regarding CoStar's expectations, beliefs, intentions or strategies regarding the future. These statements are subject to many assumptions, risks and uncertainties that could cause actual results to differ materially from those expressed or implied in the forward-looking statements. More information about potential factors that could cause actual results to differ materially from those discussed in the forward-looking statements include, but are not limited to, those stated in CoStar's filings from time to time with the Securities and Exchange Commission, including CoStar's Form 10-K for the period ended December 31, 2004, under the heading "Risk Factors." All forward-looking statements are based on information available to CoStar on the date hereof, and CoStar assumes no obligation to update such statements.
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