Location: Washington, D.C.

Developer: StonebridgeCarras

Size: 1.6 million sq. ft.

Completion: 2010

Buzz: This mixed-use development in the NoMa neighborhood of Washington, will combine 929,000 sq. ft. of office space with 80,000 sq. ft. of retail, 440 apartment units and a 204-room hotel. Constitution Square will be located next to the city's New York Avenue Metro station.