The Apartment Bungalow & California-type Houses of Arlington County Multiple Property Documentation (MPD) form facilitates the nomination to the registers of two relatively rare and infrequently acknowledged house forms in Arlington County—the apartment bungalow and the California-type house. These house forms are found in defined neighborhoods rather than county-wide, reflecting the works of select builders and the overall growth pattern of Arlington County. Each house form has a distinctly different development period, with the apartment bungalow dating from 1938 to 1939 and the California-type house constructed after World War II from 1946 to 1952. The four-room apartment bungalow was the quintessential small house, providing approximately 900 square feet in a 30-foot by 30-foot plan. The California-type house, recalling many of the features of the popular ranch house, presented a one-story rectangular plan of 1,141 square feet with combined living and dining areas, kitchen, and two bedrooms. Despite these few disparities, the two house forms share a number of notable similarities in their attempt to provide efficiency of living and economically built housing in the burgeoning suburbs of Washington, D.C.; the similarities have resulted in the preparation of this single Multiple Property Documentation form.