PRESS RELEASE DETAIL


Dec 21, 2007

CoStar Group, Inc. Announces Conference Call to Discuss Q1 2005 Results and the Company's Financial Outlook

2005-04-01 2005 CoStar Group, Inc. Announces Conference Call to Discuss Q1 2005 Results and the Company's Financial Outlook

Hosted by Andrew C. Floran...

2005-04-01 2005 CoStar Group, Inc. Announces Conference Call to Discuss Q1 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 Q1 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 close of the market, Tuesday, April 19, 2005

CONFERENCE CALL:
Wednesday, April 20, 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: 5312145

A telephonic replay of the conference call will be available two hours after the live call concludes through midnight on April 30, 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

Peggy Enright, Investor Relations Coordinator, CoStar Group (301) 280-7679 penright@costar.com

no footer