54-56 Williams Ave, San Francisco, CA 94124

The two-unit residential property at 54-56 Williams Avenue in Bayview, currently owned by the Tam/chow Family Trust, has undergone significant recent improvements, most notably the construction of a new 994-square-foot ADU (Accessory Dwelling Unit) completed in 2023-2024. This new structure, built under the California State ADU Program requirements, includes three bedrooms, two bathrooms, a kitchen, and modern amenities such as a 2-ton heat pump, electric water heater, and electric range.

The ADU construction was accompanied by comprehensive plumbing and electrical upgrades, including the installation of new utilities and infrastructure to support the additional living space. The building's maintenance history shows attention to basic upkeep, with a reroofing permit issued in 2001 for $6,500, though this permit eventually expired.

Of particular note is the recent addition of a 2.835 kW solar panel system, installed in 2024, demonstrating an investment in sustainable energy infrastructure. The property has experienced several urban management challenges in the surrounding area, with a notable cluster of street cleaning and debris-related 311 calls between 2023 and 2025, including reports of human waste and general refuse on public sidewalks. There have also been multiple parking enforcement calls in the vicinity, with some resulting in citations, though these external issues do not directly reflect on the building's condition or management.