The Mansion on O Street

The Mansion on O Street
The mansion in 2025
Interactive map of the The Mansion on O Street area
General information
LocationWashington, D.C., U.S., 2020 O Street N.W.
OpeningFebruary 14, 1980
OwnerH.H. Leonards
Technical details
Floor count4
Floor area30,000 sq ft (2,800 m2)
Design and construction
ArchitectEdward Clark (original - 1892)
Other information
Number of roomsvarious
Number of restaurantsvarious
Website
www.omansion.com
Preview warning: Page using Template:Infobox building with deprecated parameter "chain". Replace with "hotel_chain".
Preview warning: Page using Template:Infobox building with deprecated parameter "floors". Replace with "floor_count".
Preview warning: Page using Template:Infobox building with deprecated parameter "logo_width". Replace with "logo_size".
Preview warning: Page using Template:Infobox building with deprecated parameter "image_width". Replace with "image_size".
Preview warning: Page using Template:Infobox building with deprecated parameter "hotel_name". Replace with "name".

The Mansion on O Street is an American luxury boutique hotel in the Dupont Circle historic district of Washington D.C. The hotel is noted for eccentric interior styling which includes hidden doors, secret passages, and rooms in which all furnishings and fixtures are for sale. The four-story building contains guest rooms, a private Social club, the O Street Museum Foundation and a conference center.