450-452 21st Ave, San Francisco, CA 94121

This two-unit residential building located at 450-452 21st Avenue in San Francisco's Central Richmond neighborhood was constructed in 1914 and contains two stories. The property underwent significant renovations between 2006-2007, including a $260,000 remodel that added features such as a ground floor unit with hallway, dining room, kitchen, living room, bedroom, and bathroom. Additional improvements during this period included relocating washer/dryer units, electrical upgrades with new panels, and the installation of a garage door opener.

A building complaint was filed in 2005 regarding an illegal basement unit and unauthorized bathroom, though this was abated by November 2007. The property has experienced several maintenance and service issues over the years, with the most recent concerns primarily related to external matters such as parking violations and sidewalk maintenance. Between 2018 and 2024, there were multiple reports of parking violations on the sidewalk, three of which resulted in citations. The building faced plumbing issues in August 2018 with a sewage backup incident.

Recent service calls include waste removal in April 2023 and graffiti cleanup in 2021. In 2024, there were two documented instances of parking violations requiring enforcement intervention. The property underwent a major transformation under the ownership of James Tsao, with completed electrical permits showing substantial electrical system upgrades. A notable planning record indicates a proposal to merge the two units into a single-family dwelling, though this status is listed as informational and may not reflect final actions taken.