1255-1257 20th Ave, San Francisco, CA 94122

The property at 1255-1257 20th Avenue in San Francisco's Central Sunset neighborhood is a 2-story multi-family residential building constructed in 1912, containing three units and currently owned by the Chan Family Trust. The building has undergone several significant improvements over the years, most notably in 2005 when foundation upgrades were completed for both the main building and a detached structure at the rear of the lot, with electrical work involving the installation of a concrete-encased electrode system.

Historical records show two notable complaints: a December 1999 incident involving heating and electrical wiring issues (resolved by January 2000), and a December 1994 situation regarding unauthorized roof work and water damage affecting interior plaster and carpets (resolved by the end of the same month). Of particular note is a concerning pattern of maintenance issues appearing in 2024, with ten documented cases between March and January 2025 involving reports of garbage and debris, including multiple instances of abandoned furniture and loose yard waste.

While these recent 311 calls have all been marked as resolved, they suggest recurring challenges with property maintenance and waste management in the vicinity. The building's maintenance history shows that while significant structural improvements were made in 2005, there are no recent records of major building permits or system upgrades, and the only expired permit on file dates back to 1985 for kitchen cabinet and drywall work.