419-421 12th Ave, San Francisco, CA 94118

The two-unit residential building at 419-421 12th Avenue in San Francisco's Inner Richmond district, owned by Sonia A M Lee, has undergone several significant improvements and faced various maintenance challenges since its construction in 1922. Most notably, the property received a comprehensive solar upgrade in 2018, including installation of an 18-module solar power system and a new 125-amp service panel, which was completed successfully at a cost of approximately $13,590.

Earlier foundation issues were documented in the mid-1990s, with multiple permits for shoring and underpinning work, though these permits ultimately expired or were canceled without completion records showing resolution of these structural matters. The building has experienced recurring fire safety compliance issues between 2019 and 2024, with multiple violations and corrective actions required for alarm systems, exit maintenance, and sprinkler/standpipe systems.

While most of these issues were promptly addressed as "Condition Corrected," there is currently an active violation as of November 2024 regarding emergency lighting and extinguisher servicing. Recent documentation shows a series of 311 calls from early 2023 through late 2023 primarily related to street cleaning and maintenance issues in the vicinity, including multiple reports of human/animal waste and loose garbage, though these external matters are unrelated to the building's internal conditions. Recent fire safety violations from November 2024 regarding emergency lighting and extinguisher servicing remain under review, having been referred to hearing, indicating ongoing attention to building safety systems is required.