20-22 Walter St, San Francisco, CA 94114

The two-unit residential building at 20-22 Walter Street in Duboce Triangle, owned by Dolores Acosta Maufras, is a two-story flats and duplex structure built in 1900. The property has undergone significant renovations in recent years, with major work completed in 2021 costing approximately $120,000, including crawl space improvements, water heater relocation, and floor framing replacement in the second-floor sunroom.

Earlier that same year, substantial renovations were performed including kitchen and bathroom remodels, stair replacements, and the installation of new heating systems for both units. The building received a 200-amp two-meter electrical service upgrade in 2020. There have been several code compliance issues, most notably in 2011 when unauthorized window replacements led to violation proceedings, though these were resolved by 2012.

More recent complaints include concerns about construction work beyond permit scope in 2021, unpermitted electrical work in 2020, and a complaint about excessive jackhammering in 2024. Multiple 311 calls have been logged for various issues including sidewalk parking violations and a flooding incident in 2023. The most recent building permits and construction work have focused on maintaining building code compliance and modernizing systems, though there have been some complaints about work being performed beyond the scope of permitted modifications.