40-42 Sycamore St, San Francisco, CA 94110
The 3-unit, 2-story building located at 40-42 Sycamore Street in the Inner Mission, owned by 40 Sycamore LLC and built in 1908, is currently undergoing significant renovations following a history of maintenance and safety issues. Recent permits filed in December 2024 show substantial improvements planned, including the addition of two Local ADUs (a studio and a two-bedroom unit), voluntary soft-story seismic retrofit, sprinkler installation, and various unit remodels. Earlier improvements in 2024 included window replacements, kitchen and bathroom remodels, and exterior cladding work.
The building has a documented history of violations and complaints from 2015-2020, primarily related to illegal units, electrical hazards, plumbing issues, and safety concerns including a dilapidated rear stairwell, which have all been marked as abated. The property has undergone several major renovation attempts, with some permits withdrawn in 2024 that proposed extensive work including 30 window replacements and front stairs reconstruction. Historical violations included security issues, lead paint concerns, and various building maintenance problems, all of which were resolved by December 2019.
The building experienced multiple plumbing and electrical upgrades between 2016 and 2024, including the installation of mini-split systems and kitchen remodels. A tenant buyout occurred at the rear Clarion Alley unit in June 2020 for $61,500. Recent 311 calls from 2022-2024 primarily relate to street cleaning and waste management issues near the property.
40-42 Sycamore St Report Contents
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Building Characteristics
Total units | 3 |
---|---|
Year built | 1908 |
Total area | 2864 sq ft |
Floors | 2 |
Tax Abatements | None |
Building Class | F - Flats & Duplex |

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Key Building Statistics
Included Addresses
- 40 A Sycamore St, San Francisco CA 94110
- 40 B Sycamore St, San Francisco CA 94110
- 42 Sycamore St, San Francisco CA 94110
- 40 Sycamore St, San Francisco CA 94110
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