447-451 South Main Avenue (House), Tucson, Pima County, AZ

Significance: This pre-1900 building, of unknown builder, is an example of a Sonoran style row house typical of those found in the Barrio Libre. Built of adobe, set flush with the front property line, and with a gable now covering the original mud roof, the structure was probably constructed as a single-family dwelling. It was converted to apartments and underwent three additions to the rear to create more dwelling units. Such conversions and additions are common to the Barrio.
Unprocessed Field note material exists for this structure: FN-27
Survey number: HABS AZ-73-53
Building/structure dates: ca. 1900 Initial Construction
National Register of Historic Places NRIS Number: 78000565