Savor Everything. 13,U is an intimately scaled building comprising 129 glamorously appointed residences. Enjoy refined living perfectly located at the intersection of culture, dining and entertainment. 13,U brings a new level of sophisticated living to D.C.'s most vibrant neighborhood. Savor unrivaled features, unmatched amenities, and unparalleled lifestyle services, just steps from the heart of what's happening in theater, art, music, and food.