NEW YORK CITY — TerraCRG has brokered the sale of an apartment building located at 267 Flatbush Ave. in Brooklyn’s Prospect Heights neighborhood. An undisclosed buyer acquired the property for $9.7 million, or $919 per square foot. The four-story building features nine apartment units and one commercial unit. Morgan’s BBQ occupies the commercial space. Ofer Cohen, Dan Marks, Adam Hess and Daniel Lebor of TerraCRG brokered the transaction.