231 Valley St, San Francisco, CA 94131

The two-story, four-unit apartment building at 231 Valley Street in Noe Valley, owned by Takahashi Masashi & Margare, has a significant history of maintenance and structural issues since its construction in 1965. Most recently, in early 2024, Unit 4 underwent bathroom renovations to address mold and plumbing issues, following multiple complaints in late 2023 about leaking pipes and black mold in the bathroom and kitchen. The building's history suggests recurring plumbing and moisture problems, with similar issues documented in 2001-2002, including leaky ceilings and garage water accumulation.

The property has undergone several significant modifications, including an attempted ground floor living space incorporation in 2002-2003 (though permits expired), electrical rewiring in 2003, and various maintenance work such as reroofing in 1998, dry rot repairs in 1985, and code compliance updates in 1986. The building experienced several health and safety violations in 2001, requiring corrections to fire safety systems, smoke detectors, interior surfaces, and mold issues, though these were ultimately abated by October 2001. A recent active health and safety inspection was opened in November 2023.

The property has also seen multiple drive-by blocking complaints in the past year, though these are not directly related to building conditions. Historical complaints include concerns about an illegal unit in or behind the garage (2002), which was resolved, and routine inspections in 2001 and 2008. While the building has received various repairs and improvements over the years, the recurring pattern of plumbing and moisture-related issues suggests ongoing infrastructure challenges that have required multiple interventions.