9 Sumner St, San Francisco, CA 94103

The two-unit residential building at 9 Sumner Street in San Francisco's South of Market neighborhood has a documented history spanning several decades, with significant attention required to its maintenance and regulatory compliance. Built in 1910, this two-story flats/duplex structure has undergone various permit processes between 1986 and 1998, including water service installation, deck repairs, and an attempt to add a garage door to the lower unit.

A notable housing inspection complaint from 1996 regarding an illegal basement unit with inadequate heating and metering was eventually resolved by January 1997. More recently, there was a violation related to short-term rental activity through Airbnb, which was abated with penalties paid. The property has experienced ongoing environmental challenges in the immediate vicinity, particularly during 2024, with multiple incidents of human waste, medical waste (needles), and general garbage issues reported through 311 calls.

The building's surroundings have required frequent attention from Street and Environmental Services, with eight such reports between January and October 2024. There were also two driveway blocking incidents in 2024 that required parking enforcement intervention. While the most recent building permits and complaints suggest no active structural or safety issues with the building itself, the area around the property has faced recurring sanitation and maintenance challenges that have required municipal intervention.