166 Winfield St, San Francisco, CA 94110

The three-story, two-unit multi-family residential building at 166 Winfield St in Bernal Heights was built in 1986 and has undergone several significant modifications and permit activities over its lifetime. The most substantial work occurred between 2011-2015, when the lower unit was expanded into the basement/ground floor level, including the addition of stairs connecting two levels, a guest bedroom/bath, and media room, with associated plumbing and electrical work. This expansion project faced multiple issues, including three active violations in 2012 related to unauthorized construction work while permits were "on hold," though these were eventually addressed through proper permitting procedures.

The building has maintained its basic infrastructure with a 2015 fireplace installation and various renovation work, including a bathroom remodel with shower pan installation. Recent maintenance records show ongoing attention to basic building systems, including a 2024 sewer vent issue that was promptly resolved. The property has experienced several parking-related incidents near the building between 2019-2024, though these are external to the building structure itself.

A tree on the property was subject to maintenance requirements due to significant fruit drop, as noted in a 2019 inspection. The building's most recent recorded fire incident was a carbon monoxide detector activation in 2023, which fortunately resulted in no actual CO detection or civilian injuries. The property's planning history shows some variance requests, though these have been marked as closed with one being disapproved. The building's permit and violation history demonstrates a transition from unauthorized construction activity to proper permitting and compliance, with all major renovation work ultimately receiving appropriate approvals and inspections.