1669-1673 Sacramento St, San Francisco, CA 94109

The property at 1669-1673 Sacramento Street is a three-unit, three-story multi-family residential building located in Nob Hill, built in 1912 and currently owned by Li Mingjing. The building underwent significant renovation and had several controversial modifications between 2013 and 2015, including the installation of new central heaters, kitchen and bathroom remodeling, and electrical system upgrades such as a 200-amp underground service installation with 4 meters and panels.

A major period of concern occurred in 2015 when multiple building violations were filed regarding illegal conversions of living spaces, safety hazards, and improper uses of the basement and fourth floor. These violations were allegedly related to unauthorized conversion of spaces into separate guest rooms and R1 transient rentals, resulting in safety concerns around egress, handrails, and occupancy classification.

The building experienced multiple complaints regarding construction work without proper permits, including fire safety violations, mold issues, and heating system problems between 2013 and 2015. In addition to these historical concerns, the property has faced ongoing maintenance challenges, as evidenced by multiple 311 calls in 2023-2024 regarding garbage, debris, and graffiti on the building, along with recurring reports of human/animal waste issues outside the property. The building's recent history shows less frequent permit activity since 2017, with the last major permit being for street space and MTA work in 2017, though there have been multiple service calls for graffiti removal and sidewalk cleaning in 2023-2024.