647-649 Minna St, San Francisco, CA 94103

The 4-unit, 2-story multi-family residential building at 647-649 Minna Street in SoMa, owned by Ronald & Susanne O Dudum, has undergone several significant improvements since its construction in 1916. The property completed its mandatory Tier 3 soft-story seismic retrofit in 2014-2020, including a $25,000 ground floor strengthening project in 2011 and associated repairs.

The building has addressed various safety and maintenance issues over the years, with notable improvements including fire sprinkler installation in 2005 (following 1996 complaints about plumbing and electrical issues), electrical rewiring of ground floor rooms in 2004, and multiple repairs to address housing code violations in 2018, such as door repairs, wall repairs, glazing reinforcement, and utility shutoff requirements. Recent building management has shown attention to safety concerns, with two documented "Blocked Exits" fire complaints in 2021 and 2023 being promptly corrected.

The property has maintained active compliance with housing inspections, though it experienced cluster of violations in 2018 that were all abated by April 2018. The most recent planning record indicates a variance was approved for legalizing a fifth unit, though the building is currently listed as 4 units. The area experienced typical urban challenges as evidenced by 311 calls in late 2024, including several parking enforcement requests and street cleaning matters, though these relate to the surrounding neighborhood rather than the building's internal conditions.