1322-1324 20th Ave, San Francisco, CA 94122

The three-story multi-family residential building at 1322-1324 20th Avenue in the Central Sunset neighborhood, owned by Willie Gao Jr., was constructed in 1915 and originally designed as a flats/duplex structure with two units. The property has undergone significant recent modifications, most notably in 2022 when permits were filed for the creation of a third unit in the attic and the installation of an additional ADU (Accessory Dwelling Unit) on the first floor, representing an effort to legalize previously unauthorized modifications under California Government Code 65852.2. These changes included reconfiguring existing bedrooms and bathrooms to accommodate new hall egress requirements.

The building has a documented history of construction-related disturbances, with multiple noise complaints filed between 2020 and 2021, including two notable illegal construction complaints in January and October 2021, though the January complaint is no longer active. Earlier renovations include a bathroom remodel completed in 2021 and various minor modifications dating back to 2003. The property has experienced several maintenance and quality of life issues, as evidenced by multiple 311 calls, particularly regarding noise disturbances during the construction period in early 2021.

Two general cleaning issues were reported in 2018 regarding loose garbage on the street. Planning records indicate efforts to legalize various unpermitted modifications, including a rear deck and landing alterations, though some permits have expired or been marked as "Rebe value." A 500W welfare check incident was recorded with no civilian injuries noted. While the recent permit activity suggests the owner is actively working to bring the property into compliance with current regulations, the building's history shows a pattern of unauthorized modifications and subsequent legalization efforts, along with recurring noise disturbances during construction periods.