1487 12th Ave, San Francisco, CA 94122

The two-unit multi-family residential building at 1487 12th Avenue in San Francisco's Inner Sunset district was constructed in 1926 and is classified as a Flats & Duplex structure. The property has undergone several significant improvements over the years, most notably a substantial foundation replacement in 2009 costing $50,000, following an earlier voluntary replacement in 1995.

In 2010, the ground floor underwent notable expansion work, adding two bedrooms and a half bath, with associated plumbing and electrical installations completed in 2011. The building experienced a lead paint-related violation in April 2018, which was resolved by October 2018 through necessary paint remediation work. More recent concerns have centered around plumbing issues, with multiple sewer-related incidents reported in late 2024, including a sewage backup discharge and sewer odor complaints.

The property has also experienced recurring parking enforcement issues, with multiple reports of driveway blocking between February and October 2024, resulting in several citations. There have been three documented fire incidents, though none resulted in civilian injuries, including a building fire classified as unintentional. The most recent building permit activity on record was a street space permit issued in May 2018, though a subsequent sewer-related complaint was logged in December 2024, indicating ongoing infrastructure challenges.