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ADU Design Center, Design, Permit, Build

Yolo County, California

ADU builder in Yolo County

Our Yolo County city guide focuses on Davis. Within Davis city limits, the city's permit process applies; on unincorporated Yolo County land, county planning and building staff review the project. Valley parcels and rural sites call for a close look at drainage, zoning and existing services.

Who reviews unincorporated Yolo County ADUs?

The Department of Community Services Planning Division is the starting point for zoning and parcel questions; Building Inspection Services handles building permits. The City of Davis is a separate jurisdiction. We establish which office has authority over the property before submission.

Site planning in the valley

For a rural or agricultural-area parcel, confirm the applicable zoning and utility arrangements rather than assuming that a large site is automatically eligible. In and around Davis, existing homes, garages and circulation routes also influence where a second home can fit.

Yolo County generally requires a site plan with permit applications. Work in a floodplain may need a flood development permit, so drainage and mapped flood conditions should be checked early where relevant.

Rules vary by jurisdiction. Call us to confirm what applies to your property.

FAQ

Yolo County ADU questions

Do I apply to Yolo County for an ADU in Davis?

Inside Davis city limits, apply through the City of Davis. Unincorporated properties use Yolo County's planning and building services.

Does a rural Yolo County lot need a site plan?

County permit applications generally require a site plan. The exact documents depend on the project and parcel; confirm them with county staff.

Should flood conditions be checked before ADU design?

Yes, where relevant. County guidance notes that floodplain work may require a flood development permit. We check site conditions before selecting the layout.

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Planning an ADU in Yolo County?

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916.505.2036

ADU Design Center2230 26th Street, Sacramento, CA 95818Call to schedule your visit.

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