637-641 Castro St, San Francisco, CA 94114
The 6-unit, 3-story multi-family residential building at 637-641 Castro Street, owned by Hugo and Patricia Arabia, was constructed in 1908 and has undergone several significant structural improvements over the past decades. Most notably, the building completed a mandatory soft-story retrofit in 2016-2017, costing approximately $76,000, which included seismic upgrades and electrical bonding work. Most recently, in June 2023, a retaining wall was reinforced at the rear property line at a cost of $31,500. The building has a documented history of addressing safety and structural concerns, including the installation of handrails on rear stairs in 2012 and repairs to wooden rear stairs in 2006.
The property has experienced several maintenance and safety-related issues over the years. In 2002, a series of violations were documented and subsequently resolved, including problems with fire proofing, ventilation, smoke detectors, stairs, gas utility shutoff tools, and storage concerns. More recent issues include a 2023 complaint regarding peeling paint, storage, and general maintenance, which was resolved by July 2023. The building's location has also experienced ongoing challenges with parking violations, as evidenced by multiple parking enforcement calls between late 2023 and early 2025, though these are not directly related to building maintenance or safety.
While the property has had various violations and complaints over the years, records indicate that these issues have generally been addressed through appropriate permits and repairs. The building's most recent major structural work, the 2023 retaining wall reinforcement, and the completion of the soft-story retrofit demonstrate ongoing investments in maintaining the building's structural integrity. The property has maintained compliance with mandatory safety requirements, including seismic retrofitting, and has addressed historical violations through appropriate corrective actions. The 311 calls related to the property primarily concern street-related issues such as parking violations and sidewalk cleanliness, rather than direct building maintenance or safety concerns.
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Building Characteristics
| Total units | 6 |
|---|---|
| Year built | 1908 |
| Total area | 5985 sq ft |
| Floors | 3 |
| Tax Abatements | None |
| Building Class | A5 - Apartment 5 to 14 Units |

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Key Building Statistics
Included Addresses
- 637 Castro St, San Francisco CA 94114
- 641 Castro St, San Francisco CA 94114
- 639 Castro St, San Francisco CA 94114
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