431-433 18th Ave, San Francisco, CA 94121
The property at 431-433 18th Avenue is a two-unit, two-story multi-family residential building located in San Francisco's Central Richmond neighborhood. Built in 1915 and currently owned by Gary Katsumi and Lorin Lea Mi, this flats and duplex-style building has undergone several significant improvements over the past three decades. The most substantial renovation occurred in 2013, with a comprehensive $70,000 remodeling project that included updates to both units' kitchens, laundry areas, and one bathroom, along with window replacements, basement wall reinforcement, and extensive electrical upgrades including a 200-amp service upgrade and full rewiring with safety features.
More recently, in 2020, the building received a new roof at a cost of $12,200. The property's maintenance history includes earlier improvements such as vinyl siding installation in 1991, another reroofing project in 1995, and sidewalk repairs in 2003. The building's recent history (2017-2024) has seen various municipal service calls primarily related to street and public space maintenance rather than building-specific issues.
These include multiple reports of driveway blocking, garbage and debris concerns, sidewalk cleaning needs, and a 2017 incident of graffiti on the building's side. Of particular note is a 2022 report regarding a tree that required inspection, though officials determined it was not posing any major concerns. The most recent service calls in 2024 have primarily involved parking-related issues and street cleaning matters that were resolved through normal municipal processes. While the building has experienced typical urban maintenance challenges, there have been no documented building-specific safety or maintenance issues requiring urgent attention in recent years.
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Building Characteristics
| Total units | 2 |
|---|---|
| Year built | 1915 |
| Total area | 3144 sq ft |
| Floors | 2 |
| Tax Abatements | None |
| Building Class | F - Flats & Duplex |

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Included Addresses
- 431 18th Ave, San Francisco CA 94121
- 433 18th Ave, San Francisco CA 94121
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