Who issues the permit in Unincorporated Delta County?

The local building department for Unincorporated Delta County handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.

How do I find out the exact requirements for my project?

Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.

Do I need a permit for accessory dwelling unit (adu) in Unincorporated Delta County?

Unincorporated Delta County does not issue residential building permits. Delta County does not issue building permits in the unincorporated area (only land use and setback compliance through Planning and Community Development). Electrical and plumbing permits are issued by the State DORA Division of Professions and Occupations; electrical is under State Electrical Board inspection.

The requirements below come from Colorado rules and describe the standard the work must still meet. They are not a statement that Unincorporated Delta County will issue you a permit.

Permit required

Yes. In Colorado, accessory dwelling unit (adu) generally requires a permit, and Unincorporated Delta County is no exception.

Colorado's 2024 ADU law (HB24-1152, C.R.S. 29-35-401 to 405) required Subject Jurisdictions to allow one ADU wherever a single-unit detached home is allowed by June 30, 2025, through administrative approval with no public hearing, even where HOA rules would prevent it. Subject Jurisdictions are cities and towns of 1,000 or more people within a Metropolitan Planning Organization, plus county areas within an MPO and a Census Designated Place of 40,000 or more. The law changes zoning, not construction rules. Subject Jurisdictions may still require compliance with adopted fire, building, utility, and stormwater codes and proof of water and wastewater capacity. Outside those jurisdictions, local zoning decides whether an ADU is allowed. An ADU always has electrical and plumbing work, which needs state or local trade permits and inspections even where no local building code applies.

Get your exact answer

Answer a few questions to see the specific permits, documents, and next steps for your accessory dwelling unit (adu) in Unincorporated Delta County.

Check my project

Documents you may need

Local building permit applicationLikely required
Site plan showing the ADU, the primary home, setbacks, and utilitiesRequired
Construction drawings, including floor plan, framing, and energy detailsLikely required
Electrical and plumbing permits (state DORA or local program)Required
Proof of water supply and wastewater capacitySometimes required

Possible inspections

Footing and foundation inspection
Framing plus electrical, plumbing, and mechanical rough-in inspections
Insulation inspection
Final inspection

Frequently asked questions

Do I need a permit for accessory dwelling unit (adu) in Unincorporated Delta County?: Yes. In Colorado, accessory dwelling unit (adu) generally requires a permit, and Unincorporated Delta County is no exception. The documents and inspections sections on this page list what the building department typically asks for.
Who issues the permit in Unincorporated Delta County?: The local building department for Unincorporated Delta County handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
How do I find out the exact requirements for my project?: Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.

PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.