534-536 42nd Ave, San Francisco, CA 94121

The two-unit residential building at 534-536 42nd Avenue in San Francisco's Outer Richmond district, owned by William Lo, has experienced several maintenance and safety issues since its construction in 1979. Most recently, in 2019, the property faced plumbing system violations related to a faulty fresh air inlet and missing house trap, though these issues were resolved within two weeks of being reported.

A history of sewage problems is notable, with three documented sewer backup incidents between 2010-2015, including one involving a 4-inch sewer vent and another from a catch basin that required flushing and cleaning of grease deposits. The building's maintenance history includes a reroofing project in 2016 costing $7,000, and in 2004, there was both an installation of cabinets and a complaint about an illegal in-law apartment with inadequate ventilation and mold issues in the kitchen, which was resolved. More recently, in 2023, there was a service request to Recology regarding abandoned materials.

The property has experienced recurring issues with parked vehicles blocking driveways, with three separate incidents reported between 2018 and 2019. Though these maintenance and safety concerns have generally been addressed, their frequency suggests ongoing attention to building systems and infrastructure may be necessary, particularly regarding plumbing facilities. The building currently has no active violations or complaints on record.