125 Trenton St, San Francisco, CA 94133

125 Trenton Street is a 4-unit, 2-story multi-family residential building located in Nob Hill, constructed in 1913 and currently owned by Thaddeus John Zoller & Kim. The property has undergone several significant renovations, with the most substantial occurring in 2013 when an additional basement unit was added, including new bathroom, kitchen, and partition walls, along with a complete NFPA 13R sprinkler system installation, all costing approximately $94,300.

This renovation period was marked by some building violations related to inadequate lighting, plumbing issues, and interior maintenance concerns, including mold/mildew on ceilings and floor covering problems, which were mostly abated by November 2013. The building underwent multiple routine inspections between 1999 and 2005, revealing various maintenance needs including security, smoke detector, and garbage receptacle issues, though these were generally addressed promptly.

More recent history includes a 2021 fire safety inspection that resulted in corrected sprinkler/standpipe system issues, and a 2024 investigation into illegal short-term rental activity that was resolved with an informational letter to the property owner. The property has maintained an active record of 311 calls between 2024-2025, primarily concerning garbage and debris issues on the street/sidewalk areas around the building, though these external maintenance matters don't directly reflect on the building's internal conditions. Historical improvements to the property include window and parapet safety upgrades in the late 1980s, and various interior and exterior maintenance work throughout the years, demonstrating ongoing maintenance efforts by the ownership.