20 San Antonio Pl, San Francisco, CA 94133

20 San Antonio Place is a three-story multi-family residential building located in Telegraph Hill, consisting of 8 units and constructed in 1958. The building has recently experienced several significant structural and maintenance issues, with the most pressing being an active violation filed in January 2024 regarding cracks and spalling at the building's base with possible water intrusion, and a flooding incident in June 2024 attributed to pipe blockages. These structural concerns follow a pattern of water-related issues, including a documented history of leaks from top to bottom floors, particularly during heavy rains, as noted in a October 2023 complaint.

To address safety concerns, the building is currently undergoing fire alarm system upgrades, including the installation of new low-frequency sounders in sleeping areas, to comply with San Francisco Fire Code requirements. The building has undergone several unit renovations over the years, including comprehensive updates to Units 1A (2021), 2B (2018), and gas line replacements for units 1A, 2A, and 3A in 2019. Historical records show previous concerns with the building's infrastructure, including a sewer leak investigation in 2005, a damaged fence issue in 2018, and multiple dry rot repair attempts in 1996.

The property has also seen routine maintenance such as reroofing in 2010 and water heater replacement in 2016. A tenant buyout occurred in November 2021 for $8,500, and there have been several 311 calls regarding the property, primarily related to parking violations, though none directly related to building maintenance or safety issues. The building's recent history suggests ongoing challenges with water management and structural integrity, particularly at the foundation level, while also demonstrating regular maintenance and upgrading work being performed on individual units and building systems. Compliance with fire safety requirements is currently being addressed through active permits and inspections.