477-481 Duboce Ave, San Francisco, CA 94117

The three-unit, three-story multi-family residential building at 477-481 Duboce Avenue in the Duboce Triangle neighborhood, owned by Scott Mayfield Separate Pro, has undergone significant structural and safety improvements since its construction in 1900. The property has experienced several major foundation work projects, most notably in 2014 when substantial repairs were performed on multiple walls and beams, costing approximately $75,000. More recent improvements include the installation of new heating systems throughout 2021, with three separate heating unit replacements totaling approximately $2,000.

The building faced multiple housing code violations in early 2021, primarily related to heating system failures and staircase safety issues, including missing handrails that had been reported as causing accidents. During 2020-2021, tenants raised several concerns regarding building systems, including inadequate kitchen and bathroom ventilation following recent renovations, which allegedly led to frequent fire alarm activations. These issues were addressed through various permits and inspections, including the installation of handrails in March 2021 to resolve safety complaints.

The building has a history of routine inspections and violations dating back to 2000, with the most recent inspection-related issues being resolved by mid-2021. Infrastructure maintenance remains an ongoing concern, with recent 311 calls in 2023-2024 reporting sidewalk defects and graffiti issues, though many of these cases have been resolved or are currently under review. The property underwent a tenant buyout at 479 Duboce Avenue in June 2021 for $25,000.