PRESS RELEASE DETAIL


Dec 21, 2007

Conference Call to Discuss Q2 2005 Results and the Company's Financial Outlook

2005-07-07 2005 Conference Call to Discuss Q2 2005 Results and the Company's Financial Outlook

Hosted by Andrew C. Florance, President & Chief Exe...

2005-07-07 2005 Conference Call to Discuss Q2 2005 Results and the Company's Financial Outlook

Hosted by Andrew C. Florance, President & Chief Executive Officer and Frank A. Carchedi, Chief Financial Officer

COSTAR GROUP, INC.
(NASDAQ: CSGP)
http://www.costar.com

Conference Call to Discuss Q2 2005 Results and the Company's Financial Outlook


Hosted by Andrew C. Florance, President & Chief Executive Officer
and Frank A. Carchedi, Chief Financial Officer


PRESS RELEASE:
After the Market Close, Wednesday, July 20, 2005

CONFERENCE CALL:
Thursday, July 21, 2005
11:00 AM (EDT)

U.S. Dial-In Number: (800) 329-4405
International Dial-In Number: (706) 634-0964

Live Web broadcast can be found at: http://www.costar.com/corporate/investor

CONFERENCE CALL REPLAY:
U.S. Dial-In Number: (800) 642-1687
International Dial-In Number: (706) 645-9291
Conference ID: 7529485

A telephonic replay of the conference call will be available two hours after the live call concludes through midnight on July 28, 2005. The replay will also be available over the Internet at http://www.costar.com/corporate/investor for a period of time following the call.


For more information, please contact:

Mark Klionsky, Senior Vice President, CoStar Group (301) 280-3898 mklionsky@costar.com

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