4912 California St, San Francisco, CA 94118

The two-story, four-unit apartment building at 4912 California Street, owned by Hu Xiao Xin and built in 1923, has undergone several significant renovations and faced multiple infrastructure challenges over the past two decades. Most recently, in 2014, the property underwent a bathroom and kitchen remodel, which included electrical work and plumbing updates, though this renovation initially drew a complaint about unpermitted work.

Prior substantial improvements were made in 2006-2005, including electrical work for units 1, 2, and 4, and the installation of fire sprinklers in unit 1. A notable concerning period for the building occurred in 2013-2014, when tenant complaints were filed regarding lack of heat, black mold in a bathroom, and improperly vented dryer issues. The building experienced significant infrastructure issues in 2022, with multiple sewage backup incidents reported between May 23 and June 8, 2022, affecting the property's sewer system and causing flooding on the property.

Historical maintenance records show various improvements, including exterior siding repair in 2003 and a fire safety-focused renovation in 2006. The building faced serious violations in 2000 related to fire safety, security, and general maintenance, including issues with fire proofing, self-closing doors, and smoke detectors, though these were all abated by January 2001. Other improvements over the years have included a roofing project in 1998 and various unit-specific renovations, suggesting ongoing maintenance and upgrades to the building's systems and living spaces, though the recent sewage issues indicate potential challenges with the building's infrastructure systems.