451 33rd Ave, San Francisco, CA 94121

The two-unit residential building at 451 33rd Ave in the Outer Richmond, owned by Annie Te Muoi Chin Revocable Trust, is a two-story flats and duplex structure constructed in 1924. The building's permit history shows several attempts to modify the property, including a 1995 attempt to legalize storage, toilet, and laundry rooms while removing a kitchen, and a completed 1985 renovation to add a storage room at the rear of the basement.

More concerning is the pattern of complaints regarding possible illegal unit conversions, with multiple reports between 1995 and 2020 suggesting unauthorized in-law units at the garage level with kitchens and bathrooms, including an active complaint from June 2020 regarding unpermitted kitchen/bathroom remodels and deteriorated electrical equipment. The property has experienced recurring parking enforcement issues, with multiple complaints about driveway blocking between 2021-2022, resulting in several citations, though some complaints were invalid due to incomplete reporting information.

There were also two hazardous materials reports in August 2022 regarding glass on the street or sidewalk, which were resolved after inspection. A general cleaning complaint was recorded in September 2019. While the building's age and modification history show typical residential improvements over time, the pattern of complaints regarding unauthorized units and recent safety concerns about electrical equipment suggest ongoing challenges with compliance and safety systems in the building.