1521 Treat Ave, San Francisco, CA 94110

The two-unit residential building at 1521 Treat Ave in Bernal Heights, owned by Mary Wings, was constructed in 1906 as a two-story flats and duplex structure. The building's maintenance history includes several significant plumbing issues, with three documented sewage backup incidents in 2021-2022 affecting 4-inch sewer vents or catch basins, one of which occurred most recently in March 2022.

A plumbing complaint regarding a clogged kitchen sink and slow-draining bathroom sink was filed in November 2012 and resolved by March 2013. In 2011, the property underwent repairs to the house trap, and in 1999, structural work was completed to address an out-of-plumb 6x6 post. The building has experienced some concerning incidents over the years, including an illegal basement unit complaint filed in August 2004 and multiple sewer-related issues, most recently documented in 2022.

The property has also been subject to various parking and abandoned vehicle complaints in the vicinity, with three such incidents recorded in 2023 alone, though these are not directly related to the building's condition. An unspecified water-related fire incident was recorded, though no civilian injuries were reported. The building's permit and violation history suggests a pattern of plumbing-related challenges, though most historical issues have been addressed through proper channels.