The Mesa County Building Department manages permits for all unincorporated areas of the county. Incorporated municipalities, such as Grand Junction, Fruita, and Palisade, maintain their own independent building departments and permit portals for properties within their respective city limits. Development in unincorporated areas is subject to additional review for floodplains and wildfire hazard zones.
How this fits with the state
The state authority here is Colorado DORA - State Electrical Board and State Plumbing Board. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.