3709-3711 20th St, San Francisco, CA 94110

The property at 3709-3711 20th Street is a two-unit, two-story multi-family residential building located in the Eureka Valley/Dolores Heights neighborhood, built in 1900 and currently owned by the Paul A Disangro Living Trust. The building's maintenance history shows several significant improvements, including a major renovation in 2005 costing $87,000 that involved deck structure removal and window replacements, and an electrical upgrade in 2004 converting overhead to underground 200-amp service.

The property has faced some compliance issues, most notably in 2016 when two complaints were filed regarding unpermitted construction work in the backyard involving fence installation, concrete work, retaining wall construction, and demolition of an outbuilding. The building has experienced recurring plumbing issues, with documented sewage backup incidents in 2019 and 2020 that required municipal intervention. Recent maintenance activity includes tree limb removal in 2022 and debris cleanup in 2021.

The property has had three sewer-related service calls in 2019-2020 and multiple instances of driveway blocking that required parking enforcement intervention between 2019 and 2024. Planning records indicate a proposed project to construct a single-car garage at the street and restore the building to a single-family dwelling status, though the current use remains classified as multi-family residential. The building's permit history shows various maintenance and improvement projects over decades, including a roof replacement in 1991 and rain gutter installation in 1983, demonstrating ongoing upkeep of the property.