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Learn › Sonoma County › ADU ministerial fast-track

Sonoma County, CA

Can I add an ADU?Tier-D

This is one of the ten advisory gates DealSponsor checks for a Sonoma County parcel: ADU ministerial fast-track. Below is the framework and where to confirm it — not a verified determination for any specific parcel.

What this gate is

ADUs are largely ministerial / by-right under California ADU law. Confirm current local ADU size limits, setbacks, owner-occupancy, fees, and any pre-approved plan sets with county Planning. Tier-D UNVERIFIED.

Who confirms it in Sonoma County

Permit Sonoma (Permit & Resource Management Dept) — https://permitsonoma.org/ unverified

Source pointer: Sonoma County — adu ministerial fasttrack — confirm — https://permitsonoma.org/

How DealSponsor helps

Create your parcel, pick Sonoma County, and DealSponsor lays out this gate alongside the other nine as a checklist with source pointers — then exports a clean feasibility brief (free) or the full capital-ready package (Premium). It organizes the framework; you and your professionals supply the verified facts.

Check can i add an adu for your parcel — free.
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Same question, other counties: Butte CountyEl Dorado CountyMarin County