721 Balboa St, San Francisco, CA 94118

The two-unit residential building at 721 Balboa Street in San Francisco's Inner Richmond neighborhood is a two-story flats and duplex structure built in 1924, currently owned by the Isabel S Wong Trust. The property has undergone minimal documented improvements over the past several decades, including a $13,000 reroofing project completed in 2019, though this roof work appears to be inadequate given the building's current maintenance problems. Most notably, the property has experienced a staggering series of sewage-related incidents in recent months, with eight separate sewage back-up discharge incidents reported between October and November 2024, all from side sewer vents.

This indicates significant and ongoing sewer infrastructure issues that appear to be affecting both units consistently. While there were two driveway blocking incidents reported in 2023, these are not directly related to building condition. The building's permit history shows only limited activity, with a street space permit from 2011 and a completed permit from 1982, suggesting relatively few permitted improvements or modifications over the past 40+ years.

The most recent fire incident recorded was a false alarm or call, though no civilian injuries were reported. The concentration of recent sewage incidents is particularly concerning, suggesting systemic plumbing issues that have emerged in the past year. Despite the apparent age of the building and its limited permit history, there is no documented history of significant structural modifications or improvements that would typically be expected in a building of this age, aside from the relatively recent roofing work.