4020 20th St, San Francisco, CA 94114

The two-unit residential building at 4020 20th Street, located in the Eureka Valley/Dolores Heights neighborhood, was constructed in 1912 and is currently owned by Peter D Larsen & Joan L Wul. The property has undergone several significant renovations and repairs over the past two decades, with the most notable work occurring in 2001-2002 when multiple major remodeling projects were completed, including kitchen and bathroom upgrades across both floors, window replacements, and adjustments to non-conforming structures.

A controversial permit for non-conforming deck repairs in late 2001 led to an investigation and some enforcement scrutiny before being resolved in early 2002. Of particular importance is the removal of an illegal basement unit in 1999-2000, which included the removal of all associated plumbing, though some plumbing issues have persisted at the property, including a broken sewer complaint filed in 1996 that remains active as of October 2023. The building's maintenance and resident experience have been marked by various infrastructure updates, including a new house trap installation in 2013, though some unresolved issues persist, such as an open public stairway defect reported in February 2024.

Recent years (2023-2024) have seen a pattern of maintenance and compliance issues primarily related to exterior matters, including sidewalk management, parking concerns, and street cleaning needs. These recent issues have mostly involved external factors such as blocked sidewalks from construction materials, graffiti, and various parking-related complaints, rather than internal building concerns. The property's only recorded fire incident was a smoke detector activation with no fire or injuries reported.