120 Trenton St, San Francisco, CA 94133

The 12-unit, 3-story multi-family residential building at 120 Trenton St in Nob Hill, owned by Chinatown Properties LLC, has a significant history of maintenance and safety issues since its construction in 1923. Most recently, in October 2023, there was a fire safety violation issued regarding exit maintenance, though this was resolved within days. The building has undergone several major improvements over the past decade, including the installation of a comprehensive fire sprinkler system in 2015-2016 (costing over $50,000 total) and a reroofing project in 2019 costing $14,000.

There have been recurring fire safety concerns, with multiple violations for extinguishers (2018, 2021, 2023), alarm systems (2008, 2018), and blocked exits (2006). The building experienced significant maintenance issues in 2016-2019, including problems with heating systems, plumbing, and electrical systems, though many of these issues appear to have been addressed through subsequent repairs and upgrades. Historical documents reveal a pattern of electrical and safety concerns, particularly in the 2010-2016 period, including multiple complaints about electrical shutdowns, safety hazards in units 6 and 7 (2014), and multiple fire safety violations.

The building underwent substantial renovation in 2013-2014, including basement improvements and unit reconfigurations valued at over $180,000, along with extensive electrical work including the installation of a 400-amp service panel. Earlier maintenance history shows instances of water heater replacement, bathroom renovations, and various code compliance upgrades dating back to the 1980s. The property has had one documented case of illegal short-term rentals (2019) involving multiple units, though this situation was investigated and addressed. Recent maintenance issues reported through 311 calls have primarily related to building exterior conditions and general sanitation matters rather than internal systems, suggesting some improvement in recent years.