Navy Yard, Washington, D.C.
The Yards is a public-private partnership spanning ,  of office space, 2,800 residential units, 160,000 to 350,000 square feet (15,000 to 33,000 m2) of retail space, and a  riverfront park. The first construction (400 residential units) began in 2007 and the entire project is to be completed in three phases over 10–20 years.