2131 Mason St, San Francisco, CA 94133

The three-story multi-family residential building at 2131 Mason Street in North Beach, owned by Betty Sunling Ching in 2014, was constructed in 1912 and contains five units. The property has undergone several significant improvements over its lifetime, with the most recent major work occurring in 2008 when both the electrical system was upgraded to 100 amp service and fire safety improvements were made in the garage with the installation of one-hour fire-rated drywall, indicating attention to safety standards.

In the year 2000, a significant interior modification was completed to legalize existing lower floor spaces, including a family room, bedroom, storage area, and bathroom. The building had an expired permit from 1993 for concrete foundation extension work.

The property has been subject to routine housing inspections in 1999, 2003, and 2006, all of which were completed without incident. A notable complaint was filed in August 2021 regarding construction noise from a private property on Mason Street, which was reported and addressed within one day, though this was not directly related to the building itself. The building's permit history suggests regular maintenance and upgrading of systems when necessary, with particular attention paid to safety improvements in recent years.