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Learn › Marin County › ADU ministerial fast-track

Marin County, CA

Can I add an ADU?Tier-D

This is one of the ten advisory gates DealSponsor checks for a Marin 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 Marin County

Marin County Community Development Agency — https://www.marincounty.gov/departments/community-development unverified

Source pointer: Marin County — adu ministerial fasttrack — confirm — https://www.marincounty.gov/departments/community-development

How DealSponsor helps

Create your parcel, pick Marin 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 CountyMendocino County