331 Filbert St, San Francisco, CA 94133

The three-unit, three-story multi-family residential building at 331 Filbert Street in Telegraph Hill, owned by 331 Filbert Street LLC, was constructed in 1955. The property has undergone several significant modifications and faced multiple compliance issues over the years. Most notably, between 2006-2009, there was considerable controversy regarding unauthorized modifications, including the installation of five windows on the east property line wall, an aluminum greenhouse solarium on the third floor, and a rooftop deck, which led to multiple violations and complaints.

These issues were eventually addressed through proper permitting processes, including a Rear-Yard Variance approval for the solarium and elevator installation. Recent improvements to the building include the 2015 installation of new siding and two concerning incidents in 2015 involving lead paint scraping without proper containment and problematic scaffolding. The building has also undergone several important safety upgrades, including the installation of automatic fire sprinklers in 2008, work on hot and cold service lines, a tankless water heater installation, and electrical upgrades in 2008-2009.

Historical issues included sewer problems in 2006 and several expired/renewed permits requiring final inspection between 2008-2013. The most recent building permit was issued in 2015 for siding work, though there are recent 311 calls from 2022 and 2024 regarding sewer issues and sidewalk defects. The building's mechanical systems were notably upgraded between 2008-2015, including elevator installation and various infrastructure improvements.