1209 40th Ave, San Francisco, CA 94122
The two-unit residential building at 1209 40th Avenue, located in San Francisco's Outer Sunset neighborhood, is a two-story flats and duplex structure built in 1946, currently owned by David Dao and Wendy Tu. The building's recorded history shows one significant building complaint from 2005 regarding an illegally installed kitchen hood venting into a nearby bedroom window, which remained unresolved until 2012 and raised concerns about potential unauthorized kitchen modifications.
The property has generated numerous 311 calls and complaints over the past year (2023-2024), with recurring issues related to parking and street maintenance. Most recently, there have been multiple reports of abandoned vehicles in the vicinity, though all were resolved with the vehicles missing upon inspection.
Other notable concerns include a now-resolved pavement defect (May 2024), an open case regarding an overgrown tree blocking the sidewalk (opened October 2024), and a sewer odor incident from an adjacent location (November 2024). While many of these issues are typical for urban environments and have been properly addressed through city services, the frequency of parking-related complaints and street maintenance issues in the surrounding area could impact resident convenience.
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Building Characteristics
Total units | 2 |
---|---|
Year built | 1946 |
Total area | 2368 sq ft |
Floors | 2 |
Tax Abatements | None |
Building Class | F - Flats & Duplex |

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