531-533 Fillmore St, San Francisco, CA 94117

The property at 531 Fillmore Street in Hayes Valley is a two-unit, two-story multi-family residential building built in 1900, currently owned by Wilson Hu and Agnes Toan. The building's history includes several significant events, most notably a fire incident in 1999 that required substantial repairs to the upper unit, roof, and walls, along with the installation of fire-rated parapets.

The building is currently undergoing modifications as of January 2024 to legalize an existing housekeeping unit in the attic as an ADU, which includes necessary fire safety improvements such as 1-hour fire separation and fire coating applications in the upper unit ceiling. This project will also involve reworking gas piping from the meter area to the maintenance/house unit.

The property had an incident in 1997 involving two complaints about alleged illegal units and concerning occupants, though these cases were abated within weeks and marked as not active. Between 2021 and 2024, there have been multiple maintenance and environmental issues documented through 311 calls, primarily relating to parking violations (including sidewalk parking), general street cleaning needs, and minor graffiti, all of which were resolved through appropriate channels. The building's records show consistent attention to regulatory compliance, with the most recent permits demonstrating ongoing efforts to bring the property into full legal compliance with current housing regulations.