Plans Filed for Three New ADUs Through Garage Conversion in San Francisco’s Castro District

Plans have been officially filed to convert a section of a ground-level garage at 3571 16th Street in San Francisco's Castro District into three new accessory dwelling units (ADUs). The proposal by Structure Properties, with designs by Syncopated Architecture, seeks to replace eight covered parking spaces within the existing 33-foot-tall, 1963-built structure. This conversion will add three two-bedroom, two-bathroom ADUs, two of which will have direct access to a shared backyard, without impacting the building's current 12 residential units.

Located on a 0.12-acre property at the corner of 16th and Pond Streets, the project leverages a local ordinance designed to facilitate housing creation. The estimated construction cost is approximately two-thirds of a million dollars, excluding other development expenses. This initiative highlights a growing trend in urban infill development, utilizing underutilized spaces like garages to address housing demand. For developers and property owners, this project exemplifies how existing structures can be adapted to increase housing density, particularly in supply-constrained markets like San Francisco, by converting non-residential space into new homes.