320-324 12th St, San Francisco, CA 94103

The three-unit residential building at 320-324 12th Street, located in San Francisco's South of Market neighborhood, is a three-story structure built in 1907, currently owned by Jose and Elena G Castellanos. The property has a documented history of stair-related issues, with multiple repairs required for the rear exterior stairs due to dry rot in 2018, following similar concerns in 2007 that necessitated more extensive repairs costing $5,000.

Notably, the building faced significant violations in early 2018, including multiple health and safety issues such as the need for fire extinguisher maintenance, smoke alarm certification, and structural maintenance compliance, along with problems related to combustible storage and peeling paint that presented potential lead hazards; these violations were all abated by April 10, 2018. The building's more recent history includes a 2020 complaint about unpermitted construction activity and several 311 calls in 2024 related to various issues including illegal parking, garbage and debris, graffiti, and waste removal.

The property has undergone some improvements over the years, including a kitchen remodel in 1986 and an unsuccessful attempt to replace windows and install deadbolts in 1985. Recent 311 calls from 2024 indicate ongoing maintenance challenges in the surrounding area, though these are primarily external to the building itself. The building's documented history shows a pattern of addressing structural and safety issues as they arise, with most recent violations being resolved through proper channels, though the frequency of stair-related repairs suggests ongoing challenges with this particular building component.