Quality Hill (John Thomson Mason House; Charles Worthington House)

Quality Hill, also known as the John Thomson Mason House, is a historic building, located at 3425 Prospect Street, Northwest, Washington, D.C., in the Georgetown neighborhood.

Quality Hill (The John Thomson Mason House) is a well-proportioned, late 18th century house which faces south on the northeast corner of 35th Street and Prospect Street (Georgetown). The free-standing house is constructed of Flemish bond brick painted light grey with a molded stone water table at the first floor line. Quality Hill is one of the finest of the few surviving large, free-standing late Georgian town houses of Georgetown. It was built around 1797-98 and first occupied by John Thomson Mason. From its first to its present owner, Quality Hill has been occupied by individuals prominent in local and national affairs.

DC Inventory: November 8, 1964
National Register: March 16, 1972



3425 Prospect Street, NW