Blackfen housing stock is almost exclusively owner-occupied houses of conventional British design. The sale of the Danson Estate in 1922 marked the beginning of a major period of house building in the area and most of the houses date from the 1930s.

During the 1950s and 1960s, Blackfen experienced further suburban expansion with the construction of larger detached houses, often characterized by spacious layouts, garages, and larger garden spaces.

In recent decades, Blackfen has seen the introduction of new modern developments, including contemporary townhouses, apartment complexes, and mixed-use developments. These properties often emphasize open-plan living, eco-friendly design, and access to communal spaces.

Overall, the property design evolution in Blackfen reflects the broader trends in suburban development in Greater London over the past century. The area has transformed from rural farmland into a vibrant suburban community with a range of housing options catering to different lifestyles and preferences.