351 Hill St gains ground-floor ADU at $1.1M in Noe Valley
The Department of Building Inspection issued a $1.1 million change-of-use permit on February 23 for 351 Hill Street in Noe Valley, converting a single-family residence to a two-family residence through the addition of a ground-level ADU and a vertical addition for a third story.
Per the permit description, the work includes a remodel of the existing single-family residence, a new roof, floor reconfiguration, new windows, a new facade, and new rear decks. The estimated cost was originally $900,000 and was revised to $1,082,860. The two-story wood-frame structure becomes three stories.
The site is in the Noe Valley neighborhood, in Supervisor District 8.
- Permit number: 202508193334
- Address: 351 Hill St, San Francisco 94114
- Neighborhood: Noe Valley (Supervisor District 8)
- Permit type: Additions, alterations, or repairs
- Existing use → Proposed use: 1 family dwelling → 2 family dwelling (change-of-use)
- Existing units → Proposed units: 1 → 2
- Existing stories → Proposed stories: 2 → 3
- Estimated cost: $900,000
- Revised cost: $1,082,860
- Filed date: 2025-09-09
- Issued date: 2026-02-23