PRESS RELEASE DETAIL


Mar 05, 2008

CoStar Wins Blount Defamation Case

2004-07-22 2004 CoStar Wins Blount Defamation Case CoStar and Its CEO Florance Prevail On All Claims

BETHESDA, MD -- CoStar Group, Inc. (NASDAQ...

2004-07-22 2004 CoStar Wins Blount Defamation Case CoStar and Its CEO Florance Prevail On All Claims

BETHESDA, MD -- CoStar Group, Inc. (NASDAQ: CSGP), today announced that the U.S. District Court for the Central District of California issued a ruling in CoStar's favor in the case brought by Andrew Blount captioned Blount v. CoStar Realty Information, Inc. et al., Case No. SACV 02-520-GLT.

According to the Court's ruling, there will be a judgment of non-liability as to CoStar and its CEO Andrew Florance on Blount's claims for defamation and intentional interference with contractual relations and prospective economic advantage. Additionally, the Court found in CoStar's favor on Blount's unfair competition claim. As a result of the Court's recent ruling and the previous unanimous jury verdict, all claims in the lawsuit have now been decided in favor of CoStar and its CEO Florance.

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 markets in the United States and the United Kingdom. Based in Bethesda, MD, the company has approximately 900 employees in 38 offices 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 risks and uncertainties that could cause actual results to differ materially from these 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-Q for the quarter ended March 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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