1931-1933 Mason St, San Francisco, CA 94133

Located in San Francisco's Russian Hill neighborhood, 1931-1933 Mason Street is a 2-story, 3-unit multi-family residential building constructed in 1907 and currently owned by Woo Nanette C Trust. The property has undergone several window replacements over the years, with the most recent permits showing multiple window installations between 2004 and 2006, including the installation of vinyl windows in existing frames.

A significant maintenance issue emerged in 2010 when decorative molding on the Mason Street side was reported as a hazard to passersby, resulting in multiple housing violations related to lead paint hazards, though these were all abated by September 2011. The building has experienced ongoing municipal code compliance issues in recent years, particularly regarding waste management, with multiple citations in 2024 for improper toter (garbage bin) placement, including incidents in January, October, and other months, suggesting persistent challenges with waste management compliance.

Prior to these recent issues, there was a complaint in 2005 regarding a possibly illegal unit on the bottom floor, though this was resolved within a few months. The property has maintained regular maintenance records, including repairs to back stairs in 1989 and various window upgrades, indicating some level of ongoing upkeep. Recent 311 calls predominantly relate to litter receptacle maintenance and general street cleaning, with the most recent issues revolving around waste management compliance rather than structural or safety concerns within the building itself.