1839-1843 Mason St, San Francisco, CA 94133

The property at 1839-1843 Mason Street is a three-story, three-unit multi-family residential building constructed in 1908, currently owned by Simon Wu. The building has undergone several significant maintenance and repair activities over the past two decades. Most notably, in October 2013, the building received a $5,000 reroofing project, and an earlier $2,000 repair to the back stairs was completed in 2006.

The building has experienced multiple safety inspections, with two significant routine inspections occurring in 2006 and 2015. The 2015 inspection revealed several safety compliance issues, including the need for carbon monoxide alarms and various fire safety requirements, though these violations were abated by June 2015. There was a concerning pattern of violations in the early 2000s, including issues with stairs, fire extinguishers, smoke detectors, and a possibly unauthorized roof deck.

Of particular note is an active complaint from January 2003 regarding unauthorized conversions of the three-unit building into individual rooms with multiple families, which appears to have remained unresolved in the records. The building has also faced historical challenges regarding unauthorized units in the basement, with multiple complaints filed in 1995. Recent history shows relatively few building-specific issues, though there have been various street-level concerns recorded through 311 calls, mainly related to parking violations and general cleaning of the surrounding area. The property has experienced two emergency medical service incidents, though neither resulted in civilian injuries, and there have been no recorded fire incidents impacting the building directly.