As people began to indicate a preference for Castor Gardens as opposed to Oxford Circle, the name was applied to a larger and larger area, first encompassing the newest row homes in the area (north of Tyson Avenue) and eventually encompassing the entire area formerly known as Oxford Circle, while that name was relegated to the homes located south of Oxford Avenue which were older and smaller homes mostly built in the 1920s and 1930s. The housing stock in Castor Gardens were built as early as the 1930s, with construction halted during the years of World War II. The housing boom after World War II fueled additional construction, with the last homes being built on streets located along Cottman Avenue in 1956. Some spot building (building completed on a lot by lot basis) continued to the present day.