BETHESDA, Md., Feb. 5, 2010 (GLOBE NEWSWIRE) — CoStar Group, Inc. (Nasdaq:CSGP) the number one provider of information, marketing and analytic services to the commercial real estate industry, today announced the Company has purchased an office building at 1331 L Street, N.W. in Washington, D.C., through a wholly owned subsidiary, for $41.25 million where it plans to locate its Headquarters.
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