450 20th Ave, San Francisco, CA 94121

This two-story, three-unit multi-family residential building located at 450 20th Avenue in San Francisco's Central Richmond neighborhood was built in 1979 and is currently owned by Wan Su Hwa. The most recent significant building-related work was completed in September 2018, involving the installation of new gas piping from the meter through the second floor.

The building experienced a notable series of fire safety issues in October 2002, when multiple violations were recorded under a single complaint, including problems with egress obstructions, missing smoke detectors (in lobby and at stairs), an uncharged fire extinguisher, and a requirement for automatic sprinklers over garbage receptacles - all of which were subsequently abated by November 26, 2002. In October 2012, there was a complaint about a lack of heat due to the landlord turning off the furnace, which was resolved within a week.

The property has generated various 311 calls over the years, primarily related to parking issues and abandoned vehicles in the vicinity, including two instances of driveway blocking in 2018 and several reports of abandoned vehicles between 2016 and 2017, though all were resolved with no vehicles found upon inspection. A false fire alarm incident was recorded, though no civilian injuries were reported and no specific date was provided. The building's maintenance record shows regular attention to safety issues, with all documented violations and complaints being addressed and marked as not active.