2222-2224 Mason St, San Francisco, CA 94133

The two-unit residential building at 2222-2224 Mason Street in North Beach, owned by Mang Faye Chih-fei & Eric C, has undergone several significant changes since its construction in 1917. Most notably, in 2017, permits were filed for the addition of an accessory dwelling unit (ADU) on the first floor, including a bedroom, bathroom, study, and kitchen, with an estimated cost of $49,000.

The building has experienced some maintenance issues over the years, including a sewage backup incident in February 2024 and a sewer repair to the house trap in 2013. Recent 311 calls in 2024 have primarily concerned street-level issues, including multiple reports of human waste/urine and parking violations, particularly between August and December 2024. The property has a documented history of safety-related incidents, including one gas leak and several false fire alarms, though none resulted in civilian injuries.

Historical permits show past improvements such as reroofing work in 2002, the installation of aluminum windows in 1986, and a withdrawn demolition request from 1998. The building's maintenance record shows regular attention to infrastructure, including a completed street space permit in 2012. Recent planning records indicate the successful approval of a variance to permit the addition of the new ADU at the ground floor, demonstrating compliance with local regulations.