4366-4368 21st St, San Francisco, CA 94114

The property at 4366-4368 21st Street is a two-story multi-family residential building situated in the Eureka Valley/Dolores Heights neighborhood. Built in 1951 and currently under the ownership of the McCarthy 1990 Trust, this flats and duplex structure has undergone several maintenance and improvement projects over the years.

Notable upgrades include a window replacement project in 2001 where four aluminum windows were replaced with double-glazed vinyl windows, and significant electrical system improvements with a 100-amp service change completed in 2005. Earlier infrastructure work included concrete installation at door jambs in 1994 and a reroofing project in 1991, though a 2004 electrical permit for garage improvements expired without completion. The building has recently experienced several infrastructure challenges, particularly related to water and sewer systems.

Between late 2024 and early 2025, there were multiple reports of water-related issues, including what was initially reported as water leaks but were determined to be groundwater-related problems, and a sewage discharge incident that was found to be non-sewer-related. The property has also faced some environmental challenges in late 2024, with reports of graffiti (still open as of November 2024), garbage and debris issues, and illegal postings on multiple occasions. The building's maintenance history shows regular upkeep, with particular attention to electrical systems and weatherproofing, though some recent water-related infrastructure issues have been noted in the surrounding area.