Potrero Hill 1-to-2 unit conversion at 266 Connecticut wins $1.6M permit
The Department of Building Inspection issued a $1.6 million change-of-use permit on February 17 for 266 Connecticut Street in Potrero Hill, converting a single-family dwelling to a two-family dwelling through a rear horizontal and vertical addition. The work adds one new unit and a fourth story.
Per the permit description, the project remodels and reconfigures the existing single-family unit, adds six new bathrooms, replaces the lower-unit kitchen, and adds kitchen and living spaces for the new upper unit. Plans also expand the garage, add a roof deck, alter the front and rear with a new facade, install a new flat roof, and upgrade the foundation. The estimated cost was originally $1.17 million and was revised to $1.61 million. The wood-frame structure was filed in January 2022 and approved in September 2025.
The site is in the Potrero Hill neighborhood, in Supervisor District 10.
- Permit number: 202201035263
- Address: 266A Connecticut St, San Francisco 94107
- Neighborhood: Potrero Hill (Supervisor District 10)
- Permit type: Additions, alterations, or repairs (site permit)
- Existing use → Proposed use: 1 family dwelling → 2 family dwelling (change-of-use)
- Existing units → Proposed units: 1 → 2
- Existing stories → Proposed stories: 3 → 4
- Estimated cost: $1,168,850
- Revised cost: $1,613,161
- Filed date: 2022-01-03
- Issued date: 2026-02-17