Do I need a permit for garage conversion in Unincorporated Grand County?
Yes. In Utah, garage conversion generally requires a permit, and Unincorporated Grand County is no exception.
Utah's energy chapter, effective July 1, 2026, requires R-21 above-grade walls, R-38 ceilings, and windows no worse than U-0.32 for space enclosing conditioned space, verified by inspection before interior finishes (15A-3-203). Utah's amended IRC adds accessory dwelling units to the smoke and carbon monoxide alarm rules that apply when permitted alterations, repairs, or additions occur, and requires carbon monoxide alarms on each level of the dwelling unit where they are required (IRC R314.2.2, R315.2.2, and R315.3 as amended by 15A-3-202). If the garage becomes an internal ADU, a city or county may require the lost garage or carport parking spaces to be replaced (10-21-303(3)(c)).
Documents you may need
- Permit application on the standardized Utah building permit formRequired
- Floor plan showing the new room use, windows, emergency escape openings, and smoke and carbon monoxide alarmsRequired
- Energy compliance information for the newly conditioned spaceLikely required
- Electrical, plumbing, and mechanical scope of workLikely required
- Contractor name and Utah license number, or Owner/Builder Certification AgreementRequired
Possible inspections
- Framing inspection
- Electrical, plumbing, and mechanical rough-ins
- Insulation inspection before interior finishes
- Final inspection
Frequently asked questions
- Do I need a permit for garage conversion in Unincorporated Grand County?
- Yes. In Utah, garage conversion generally requires a permit, and Unincorporated Grand 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 Grand County?
- The local building department for Unincorporated Grand 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.