639-643 Capp St, San Francisco, CA 94110
The three-story, six-unit multi-family residential building at 639-643 Capp Street in the Inner Mission, owned by Jose L. Sainz, has undergone several significant structural and safety improvements since its construction in 1907. Most notably, the building completed mandatory seismic retrofitting in 2016-2018 to comply with San Francisco's Soft Story Ordinance, which included moment frame installation and cost $75,000, with additional revisions costing $4,000.
The building has a documented history of maintenance and habitability issues, with the most recent and concerning incident occurring in June 2023 involving sewage overflow that affected hallways and created health hazards, though this was reportedly resolved by July 2023. During 2018, there was a heating system compliance issue that required the replacement of a wall heater, and the building has a pattern of heating-related complaints dating back to 2007. Previous building violations from 2001 were addressed, including handrail repairs, security upgrades, and smoke detector installation. Historical records show ongoing maintenance and safety improvements over the years, including the replacement of a brick foundation with concrete in 1995 and periodic routine safety inspections.
The building has experienced multiple habitability challenges, particularly in the late 2000s, with documented issues including mold, ventilation problems, and heating outages. While the most critical seismic work has been completed and the building is now classified as Tier 3 Soft Story with CFC issued, recent complaints from 2023 regarding lead paint hazards, poor interior conditions, and sanitation concerns indicate ongoing maintenance needs. A fire alarm system complaint from late 2012 was found to have no merit, and there was one parking-related incident in 2018 involving an obstructing vehicle. The property's records show that many past violations and complaints have been addressed and resolved, though periodic maintenance issues continue to arise.
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Building Characteristics
| Total units | 6 |
|---|---|
| Year built | 1907 |
| Total area | 5082 sq ft |
| Floors | 3 |
| Tax Abatements | None |
| Building Class | A5 - Apartment 5 to 14 Units |

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Included Addresses
- 641 Capp St, San Francisco CA 94110
- 639 Capp St, San Francisco CA 94110
- 643 Capp St, San Francisco CA 94110
- 643 A Capp St, San Francisco CA 94110
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