1243-1245 21st Ave, San Francisco, CA 94122

The property at 1243-1245 21st Avenue is a two-unit, two-story multi-family residential building located in San Francisco's Central Sunset neighborhood. Built in 1925 and currently owned by Frank Ung, this flats/duplex building has undergone several significant repairs and renovations over the years, with the most substantial work occurring in 2006-2008.

In 2007, a major foundation replacement project costing $12,800 was completed, followed by electrical system upgrades including the removal of two fuse panels and the installation of new circuits and plugs in 2006-2007. The building experienced multiple instances of dry rot issues throughout the 2000s, with repairs documented in 2005, 2006, and 2008, including work on back stairs, upper porch walls, and various interior spaces. Between 2008 and 2023, the building has faced various compliance and maintenance challenges.

A plumbing inspection in September 2008 revealed multiple code violations requiring corrections to plumbing systems, while electrical work during the same period addressed safety concerns such as illegal disposal wiring. More recently, there has been a notable pattern of parking-related issues in the vicinity, with multiple reports of vehicles blocking driveways or being abandoned between January 2024 and March 2025, though these are not directly related to the building's condition or management. The property has maintained its multi-family residential use classification throughout its history and remains in active use as of the latest available data.