3973 25th St, San Francisco, CA 94114

The two-unit multi-family residential building at 3973 25th St in Noe Valley, built in 1900, has undergone several significant improvements over the years, with the most recent major work being a sewer line replacement completed in May 2023, following multiple sewer-related issues in late 2023 and early 2024.

Historical records show a substantial renovation attempt in 2006-2007 that included plans for a two-story addition with new kitchen, dining room, and bathroom facilities, along with related plumbing and electrical work, though some of these permits expired. The building has received various maintenance attention over the years including reroofing in 1996, sidewalk repairs in 2002, and several sewer-related interventions, with the most recent being a series of sewer back-up incidents through 2023-2024 involving the 4-inch sewer vent.

Other infrastructure improvements include the installation of a garage door operator in 2008 and older permits for vertical additions in 1992 (cancelled) and a street space permit in 2008. The property has also experienced some neighborhood issues such as illegal postings (2021-2022) and parking violations (2021, 2023), though these are external to the building's structural and plumbing systems.