523 6th Ave, San Francisco, CA 94118

The two-unit residential building at 523 6th Avenue in San Francisco's Inner Richmond district, owned by Alan Huang, is a 2-story flats and duplex structure built in 1906. The property has undergone several significant maintenance and improvement projects over the years, with the most recent being a roof shingle replacement completed in 2019 at a cost of $11,000.

Previous roof work was done in 2000 and there were siding repairs due to dry rot in 2011. A horizontal addition was completed in 1991, indicating previous expansion of the original structure. The building experienced notable fire safety violations in August 2011, when multiple citations were issued regarding combustible storage, egress obstructions, and fire extinguisher maintenance issues.

These violations were addressed and abated by October 2011. More recently, between October 2023 and January 2025, there have been numerous parking-related incidents reported, primarily involving sidewalk parking and driveway blocking, with several citations issued and multiple cases where enforcement officers were unable to locate the offending vehicles. While these parking issues are external to the building itself, they may affect accessibility and convenience for residents.