PRESS RELEASE DETAIL


Dec 18, 2007

CoStar Group Appoints Brian Radecki Vice President of Research Operations

2006-07-06 2006 CoStar Group Appoints Brian Radecki Vice President of Research Operations Accelerating World-Class Operational Excellence is Primary Focus as CoStar's ...

2006-07-06 2006 CoStar Group Appoints Brian Radecki Vice President of Research Operations Accelerating World-Class Operational Excellence is Primary Focus as CoStar's Business and Market Opportunities Expand

BETHESDA, MD — CoStar Group, Inc. (NASDAQ: CSGP), the number one provider of information services to commercial real estate professionals, today announced the appointment of Brian Radecki to vice president of research operations. Radecki is responsible for quality control of CoStar's global and U.S. research processes and reports directly to Andrew C. Florance, the company's president and chief executive officer.

Radecki has nearly 13 years of experience in accounting and finance, information systems and process improvement, including approximately nine years at CoStar, most recently as director of accounting and finance.

"As CoStar's business and market opportunities continue to expand rapidly, so, too, does our focus on accelerating world-class operational excellence across the company," said Florance. "To help ensure that CoStar's U.S. and global research operations perform flawlessly means continually enhancing quality control systems and streamlining processes. Over the years, Brian has demonstrated outstanding leadership, commitment and fiscal and operational expertise – qualities that I believe will help CoStar reach far higher levels of performance and growth than we enjoy today."

In his new role, Radecki will focus on enhancing the functionality of CoStar's major research processes while expanding the company's overall research capabilities – from conducting quality control audits to save CoStar time and money to increasing operational efficiencies by streamlining or eliminating redundant procedures.

Since joining CoStar in 1997, Radecki has overseen or played a major role in every aspect of the company's accounting and finance functions in the U.S. and U.K. – from internal audit, tax and budgeting to SEC reporting and Sarbanes-Oxley compliance. He was an integral member of CoStar's IPO team in 1998 and led the subsequent creation of an internal audit group, ensuring the integrity of all financial reporting and internal controls for the newly public company. Radecki also played a key role in CoStar's follow-on public offering in 1999 that helped fund the company's global research expansion.

Abroad and at home, Radecki has also been a key member of CoStar's mergers and acquisitions team throughout the purchase, integration and operation of U.S. firms such as Comps, Inc. in 2000 and two U.K. companies, FOCUS in 2003 and the Scottish Property Network the following year. Radecki served as chief financial officer for a Comps subsidiary and turned it around from losing millions of dollars a month to profitability in less than a year.

Before joining CoStar, Radecki held progressively more responsible accounting management positions at Axent Technologies, an international leader in the high-tech, multi-billion dollar security software market, which was later acquired by Symantec.

Radecki holds a B.S. in business administration and a dual degree in both accounting and finance from the University of New York at Buffalo.

About CoStar Group, Inc.

CoStar Group, Inc. (NASDAQ: CSGP) is the number one 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 in 66 U.S. markets and the United Kingdom. Headquartered in Bethesda, Maryland, the company has approximately 1,000 employees throughout the U.S. and the U.K., 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-K for the year ended December 31, 2005, under the heading "Risk Factors." In addition to these statements, there can be no assurance that CoStar's business and market opportunities are expanding, that CoStar's U.S. and global research operations do or will in the future perform flawlessly, that CoStar will reach far higher levels of performance and growth than it enjoys today, that CoStar will enhance the functionality of its major research processes while expanding its overall research capabilities, that conducting quality control audits will save CoStar time and money or that streamlining or eliminating redundant procedures will increase operational efficiencies. 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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