1247-1249 20th Ave, San Francisco, CA 94122

This two-story multi-family residential building, located at 1247-1249 20th Avenue in San Francisco's Central Sunset neighborhood, is owned by John Y. Chen and contains three units. Built in 1911, the structure has undergone several significant maintenance and upgrade activities over the past few years.

Most notably, an electrical service upgrade was completed in August 2021, involving a 200-amp, three-meter configuration, demonstrating attention to modern electrical infrastructure requirements. A more concerning issue arose in November 2019 when there was a sewage trap problem that required attention, though this was subsequently resolved. The building has faced various compliance and safety challenges, particularly evident from a routine housing inspection in June 2014 that resulted in multiple active violations including issues with smoke and carbon monoxide alarm documentation, fire extinguisher maintenance, and problems with handrails and guardrails.

These violations, recorded under complaint number 201477291, suggest significant safety-related concerns that have remained unresolved for an extended period. A previous inspection from September 2009 (complaint number 200922125) identified several similar issues including fire safety and handrail concerns, though these were marked as not active by January 2010. The property has also experienced some neighborhood maintenance issues, as evidenced by multiple 311 calls in 2024 regarding garbage and debris, and parking-related complaints in recent years, though these are more related to neighborhood conditions than building-specific issues.