42 Williams Ave, San Francisco, CA 94124

The property at 42 Williams Ave in the Bayview neighborhood is a two-story multi-family residential building constructed in 1904, currently owned by Li Wen Guang & Chiu Judy Yu. The building has undergone several significant renovations and legalizations over its history, with particular focus on addressing past code violations and infrastructure improvements. In 2005-2007, major work was completed including the removal of garage posts replaced with steel beams, construction of new retaining walls, electrical system upgrades with new panels, and foundation improvements.

The building previously faced code enforcement issues in 1999 regarding an unauthorized rear addition, which were subsequently addressed through various permits totaling substantial costs (over $100,000 in 2005-2007). Earlier improvements included the installation of aluminum windows in 1983. More recently, the property has experienced several urban neighborhood challenges typical of its location, with multiple 311 calls in 2024-2025 regarding garbage and debris on surrounding streets, though these issues were generally resolved promptly.

The building's immediate area has seen various parking enforcement actions, with multiple citations issued for vehicles blocking driveways or parking on sidewalks between 2023-2024. A sidewalk defect was reported in late 2022, which was transferred to appropriate authorities for investigation. The most recent building-related activity on record is a street space permit issued in November 2018, with a nominal cost listed. While the property has had its share of maintenance and neighborhood issues, the extensive renovation history suggests active management of building systems and compliance requirements.