3463-3465 20th St, San Francisco, CA 94110

The property at 3463-3465 20th Street is a two-unit, two-story multi-family residential building located in San Francisco's Inner Mission neighborhood. Built in 1909 and currently owned by Smz Landholdings LLC, this flats/duplex structure has undergone several significant events throughout its history. Most notably, the building experienced fire damage in May 2011 from an adjacent building's fire, leading to repairs that included structural work on the roof, siding, and interior spaces, with completion in 2012.

In 2018, substantial interior renovations were performed on the lower unit, including kitchen and bathroom remodeling, heating system upgrades, and new appliances, costing nearly $124,000. The building has faced various maintenance and compliance issues, including several complaints and violations in 2006 related to unauthorized construction work, including bathroom remodeling, demolition, and plumbing changes. More recent concerns emerged in 2020 regarding potential structural problems with a laundry line, unpermitted grading work, and backyard maintenance issues.

The property has generated multiple 311 calls in late 2024 and early 2025, primarily related to garbage and debris on the property, though most were resolved promptly. There are also records of historical tenant issues, including a tenant eviction under the Ellis Act, with indications that the landlord planned to donate the use of the apartments to the Capp Street Foundation. The building's electrical system received attention in 2011 with megger testing and fixture installation work, and there was a plumbing permit issued in 2006.