PRESS RELEASE DETAIL


Dec 27, 2007

CoStar Promotes Jennifer Kitchen to VP of Field Research

2004-05-18 2004 CoStar Promotes Jennifer Kitchen to VP of Field Research 10-Year CoStar Veteran To Lead Collection of Property Data, Building Photography in U.S.

2004-05-18 2004 CoStar Promotes Jennifer Kitchen to VP of Field Research 10-Year CoStar Veteran To Lead Collection of Property Data, Building Photography in U.S.

BETHESDA, MD -- CoStar Group, Inc. (NASDAQ: CSGP), today announced it has promoted Jennifer Kitchen to Vice President of Field Research. Kitchen is responsible for leading the Company's field collection of property data and building photography in the United States.

Kitchen, 31, joined CoStar Group in 1994 as a research analyst and has held a progression of management positions within the Company's research organization. In 1998, she established CoStar's first field research and photography operations, and served as director of field research and photography until this promotion.

"We are pleased to add a professional of Jenny's experience and talent to our management team," stated CoStar President & CEO Andrew C. Florance. "Field research is such an important part of our overall research effort in collecting building-level data and photographing properties. Jenny has been instrumental in developing a field research operation that adds over 100 million square feet of space availability to our database and photographs hundreds of thousands of buildings annually."

Kitchen earned a BA degree from Wellesley College in Wellesley, MA.

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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