GLL L-Street 1331 is buying an office building at 1331 L Street, in Washington, DC for $101 million. The Munich-based subsidiary of GLL Real Estate Partners will buy the property from commercial real estate provider, CoStar Group.

The seller was represented by executive managing directors, Paul Collins and William Collins, senior managing director, John Flood and senior vice presidents, James Cassidy and Judson Ryan of Cassidy Turley Commercial Real Estate Services. . The sale of the headquarter building of CoStar is scheduled to close later in February 2011.

Click here for the release from CoStar Group.