3173 23rd St, San Francisco, CA 94110

The four-unit, three-story multi-family residential building at 3173 23rd St in the Inner Mission, owned by Mauricio & Gloria Martinez, was constructed in 1963 and has experienced several significant issues over its history. Most notably, in 2004, the property was cited for multiple serious health and safety violations related to an illegal fifth dwelling unit in the garage area, which included life safety hazards such as inoperable heating, lack of smoke detectors, inadequate emergency egress, and unauthorized wiring and plumbing. These violations, along with others related to electrical, plumbing, and fire safety, were officially abated by October 2004 after the removal of the illegal unit and associated work costing $20,000.

The building has also experienced ongoing maintenance challenges, including fungal damage repair in 2006 (costing $5,000), and multiple complaints about utilities and building systems between 1996 and 2010, such as non-functioning appliances, electrical issues, and air infiltration problems. More recently, the property has had recurring sewer issues, with the most recent incidents in 2024 involving a sewage backup discharge through the side sewer vent, and two earlier incidents in 2020. There have been multiple parking enforcement issues in the vicinity, including several cases of blocked driveways between 2023-2024.

A natural gas leak incident was recorded but shows no civilian injuries. The building's maintenance history suggests ongoing infrastructure challenges, with several permits dating back to the 1980s for various repairs, including kitchen sink repairs in 1985 (permit expired) and basement wall rebuilding in 1984 (permit cancelled). While many past violations have been addressed, the property's recent history shows continued concerns with basic utility systems, particularly sewer infrastructure.