Saudi Arabia has plans for the most ambitious building project ever conceived. 

This edition of Under Contract features three homes recently featured on UrbanTurf that found buyers in anywhere from a week to a month.

The new development could be the largest new residential project to date in the Union Market area.

A big investment for an Anacostia arts district; the latest amenity for high-end rentals; and a literal treehouse.

A new report sheds a bit more light on how much rents have risen at the top of the market.