CoStar's multi-million dollar profit becomes official

Real estate firm CoStar’s $60 million profit on its D.C. headquarters became official Monday, according to real estate firm Cassidy Turley, which handled the sale. CoStar sold the building to Munich-based GLL Real Estate Partners for $101 million — more than double the price it paid a year ago when the District lured the company from Bethesda by giving it more than $6 million in tax credits.

The 169,429-square-foot “trophy office building” is on L Street between 13th and 14th streets downtown. CoStar has said it will keep its headquarters location in the District and sign a long-term lease with GLL.