1734-1740 Mason St, San Francisco, CA 94133

The 6-unit, 3-story multi-family residential building at 1734-1740 Mason St in North Beach, owned by the Quan/Mason Family Partnership, was constructed in 1908 and has experienced several significant maintenance and safety issues in recent years. Most notably, a series of violations and complaints were documented in December 2022, including concerns about mold/mildew, rodent infestation, lead paint hazards, weatherproofing, and damaged walls/ceilings. The building has also experienced recurring heating system problems, with no heat complaints filed in December 2022 and January 2023, both subsequently resolved.

A serious safety violation was identified in 2004 regarding stair repairs, which wasn't fully abated until 2007, and there have been multiple roofing projects, including a $14,000 reroofing in 2008 and a cancelled $9,900 project in 2020. The building's maintenance history shows some pattern of unpermitted work, including a 2013 complaint about window replacement without a permit and a 2005 complaint regarding an illegal basement unit that was allegedly converted to storage and half-bath facilities. The property has generated numerous maintenance complaints over the years, with the most recent issues focusing on basic habitability concerns such as heating and moisture problems.

Regular street space permits have been issued, indicating occasional use of public space for maintenance or construction activities. While there have been occasional graffiti and parking enforcement issues in the vicinity (as evidenced by multiple parking enforcement calls in late 2024), these are more related to the neighborhood's urban environment than to the building's condition itself. A smoke detector activation with no fire was recorded in the building, though this is not uncommon in urban residential buildings and doesn't indicate any systemic fire safety issues. The property has undergone some periodic maintenance and repairs, as evidenced by various building permits, though some permitted work has not been completed as originally planned.