William Knowles House, 1228 Thirtieth Street Northwest, Washington, District of Columbia, DC

Significance: The house is generally oft he Federal plan and character but demonstrates the assimilation of certain features of the Greek Revival. Although the back section has been extensively remodeled, there is indication that part of this was originally a separate two story frame building with a single chimney. This is further supported by the fact that the first known resident was listed with his carpentry shop at this address.
Survey number: HABS DC-163
Building/structure dates: ca. 1858 Initial Construction
Building/structure dates: 1964 Subsequent Work