250_delaware_avenue | buildingstartdate | january, 2014 <tsp> 250_delaware_avenue | cost | 110 million (dollars) <tsp> 250_delaware_avenue | floorarea | 308438 (square metres) <tsp> 250_delaware_avenue | floorcount | 12 <sep> the delaware north building is a mixed-use development in buffalo, new york the 12-story, 330,000-square-foot mixed-use building features class a office space, a 120-room westin hotel, ground level retail, a 7,000-square-foot outdoor courtyard, and an adjacent structured parking ramp delaware north's world headquarters anchors the building 
250 delaware ave. was begun in jan 2014 and has 12 floors and measures 30843.8 square meters. it cost 110 million dollars.the delaware north building is a mixed-use development in buffalo, new york