3364 21st St, San Francisco, CA 94110

The three-unit, two-story multi-family residential building at 3364 21st Street in the Eureka Valley/Dolores Heights neighborhood, owned by Geraldine Poon, has undergone several significant maintenance and infrastructure updates since its construction in 1900. Most recently, in September 2024, the building completed a comprehensive outside sewer and house trap replacement, demonstrating ongoing commitment to maintaining critical infrastructure.

Previous substantial work included an underground service conversion completed in 2003, which modernized the electrical systems, and a deck/stairs post replacement project in 2007 that followed a series of housing code violations related to stair repairs and safety during 2007-2011. The property has faced multiple housing code violations and complaints over the years, with the most concerning issues occurring in 2011 when there were violations related to stair repairs and combustible storage that were abated by March 2011. The building's maintenance history shows regular attention to safety concerns, including the installation of primary locking devices at exterior doors in response to a 2007 violation and various repairs to resolve housing inspection findings.

A notable safety incident occurred with a smoke detector malfunction, though fortunately no civilian injuries were reported. Recent external issues primarily involve municipal services unrelated to the building's condition, including a resolved abandoned mattress case (November 2024), a fallen tree (March 2023), and various urban maintenance matters. The building's documentation shows periodic routine housing inspections, with compliance issues being addressed in a timely manner, particularly the significant repairs undertaken following 2007-2011 violations.