547 Masonic Ave, San Francisco, CA 94117

547 Masonic Avenue is a three-story, five-unit multi-family residential building located in the Lone Mountain neighborhood, constructed in 1924 and currently owned by Chan Living Trust. The property has undergone several significant improvements over the past decade, most notably the legalization of a ground floor in-law unit in 2015-2016, which included comprehensive upgrades to plumbing and electrical systems, installation of new bathrooms, and a kitchen.

Major safety improvements include the installation of a new fire sprinkler system in 2014 covering the first floor, foundation work at the rear of the building, and various bathroom additions. The building has experienced some maintenance issues over its history, with the most recent building complaints occurring in 2014 regarding plumbing and electrical problems, though these appear to have been resolved promptly. Recent records from 2024 show ongoing attention to building maintenance and surrounding areas, with multiple service calls related to parking issues, garbage, and debris around the property, as well as reports of graffiti and encampments in the vicinity.

A tree maintenance issue was noted as open in June 2024. Historically, the building faced several violations in 2005 and 2014 related to safety equipment and plumbing issues, including fire extinguisher requirements and smoke detector installation, all of which were subsequently resolved. The property has undergone various improvements to common areas, including street space and sidewalk repairs in 2014-2016, and roof replacement work in 2017, suggesting ongoing investment in building maintenance and safety systems.