PRESS RELEASE DETAIL


Dec 27, 2007

CoStar Acquires Leading Scottish Property Information Provider

2004-06-16 2004 CoStar Acquires Leading Scottish Property Information Provider Acquisition of Scottish Property Network Expands CoStar's FOCUS Platform in the U.K.

2004-06-16 2004 CoStar Acquires Leading Scottish Property Information Provider Acquisition of Scottish Property Network Expands CoStar's FOCUS Platform in the U.K.

BETHESDA, MD -- CoStar Group, Inc. (NASDAQ: CSGP) today announced that its U.K. subsidiary, Property Intelligence Limited, has acquired Scottish Property Network (SPN), the principal provider of online commercial property information in Scotland, for approximately $1.3 million in cash.

Based in Paisley, Renfrewshire, SPN was a joint venture between the University of Paisley and Scottish Enterprise, Scotland's main economic development agency. It provides subscription-based commercial property information in the form of availability data and comparables to companies in both the private and public sectors in Scotland. SPN has approximately $700,000 in annual revenues. The acquisition is not expected to significantly affect CoStar's 2004 earnings.

"Scotland is a major commercial region in the U.K., and SPN has very high quality information and strong roots in the Scottish property markets," stated CoStar Group President & CEO Andrew C. Florance. "This acquisition fills an important missing piece of our U.K. coverage and greatly enhances our competitive position in the U.K.'s main property centers."

"Our strategy in the U.K. is the same as our strategy in the U.S.," Florance continued. "We believe there is a local market for information and a national market for information. When a bank in the U.K. needs to understand a property in London, Edinburgh or Glasgow, we want to be the universal source of quality national information for all of the U.K."

"The combination of CoStar's and FOCUS' pre-eminence in the U.S. and U.K. for quality information and technology, allied to our detailed local knowledge of the market in Scotland, creates benefit for everyone," added SPN Chief Executive David Martin, who is staying on as Managing Director of Scottish Property Network Limited. "We are proud to see our service evolve through this agreement."

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 50 U.S. markets, London and the United Kingdom. Based in Bethesda, MD, the company has approximately 900 employees in 37 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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