Crawford-Cassin House, 3017 O Street Northwest, Washington, District of Columbia, DC

Significance: 3017 O Street is a handsome example of a large free-standing Federal house. Documents as early as 1818 refer to the house as a "mansion." It is one of the few houses in Georgetown that still retains the two story side porch. Architectural evidence indicates the original entry may possibly have been on the east (porch) side. At one time the gardens of the property extended to 30th Street to the east and to P Street on the north. The house is still accessible from p Street by a private driveway. Early in the 20th century the building was altered and enlarged to be used as a private school. Today it is again a private residence.
Survey number: HABS DC-184
Building/structure dates: ca. 1816 Initial Construction
Building/structure dates: after 1900 Subsequent Work