Roosevelt, Duchesne and Myton: Duchesne County's Uinta Basin geology means genuinely lower seismic hazard than the Wasatch Front. Real ag and equipment-storage demand, engineered to the numbers that actually apply here.
Duchesne County's own published materials disagree with each other: some cite a 120 sq ft exemption for simple storage sheds, others describe a 200 sq ft exemption once a dwelling is established on the parcel. We'll confirm the exact number that applies to your property with the county before you finalize plans. Don't assume either figure without checking.
| Code criteria (Duchesne County) | Value | What it means for your build |
|---|---|---|
| Building-permit threshold | 120–200 sq ft (confirm exact figure) | County documents show two different numbers. We'll verify before your quote is final. |
| Ground snow load | 39 psf (Duchesne, ~5,508 ft) | Heavier than Salt Lake or Davis County. Plan for it in your engineering. |
| Design wind speed | 90 mph | Per Duchesne County's published design criteria. |
| Seismic design category | C/D1 | Lower hazard than the Wasatch Front's D2. Uinta Basin geology is more stable. |
| Frost / footing depth | ≈30″+ (confirm exact depth) | Basin elevation and cold winters warrant a solid footing. Confirm with the county. |
| Adopted codes | 2018 IBC/IEBC · 2015 IRC (county-specific, confirm) | Duchesne County has adopted different code editions than the 2021 statewide baseline; verify current adoption. |
Figures shown are representative Duchesne values from the county's published design-criteria table. Verify permit threshold and current code edition with Duchesne County Building Safety. Data last verified August 2026.
Duchesne County's own documents don't agree on the exact size threshold: 120 sq ft in some materials, 200 sq ft in others once a dwelling exists on the parcel. Rather than guess, we confirm the applicable number with the Duchesne County Department of Building Safety (435-738-1150) before your quote is final. A metal garage or shop with a foundation and electrical needs a permit regardless of size.
Duchesne County's seismic design category (C/D1) is genuinely lower than the Wasatch Front's D2, reflecting the Uinta Basin's more stable Colorado Plateau-adjacent geology. That doesn't mean skip the engineering. It means a properly-sized building here isn't fighting the same seismic forces as a comparable building in Salt Lake or Utah County, which can be a real cost and design advantage.
The county's own documents show both 120 sq ft and 200 sq ft as thresholds depending on the material. We confirm the exact figure with the county before finalizing your plans.
Yes. Duchesne County's seismic design category (C/D1) is lower hazard than the Wasatch Front's D2, due to the Uinta Basin's more stable geology. Every building is still engineered to the site's actual code requirements.
Duchesne's design snow load is 39 psf and design wind is 90 mph, per the county's published design criteria.
Yes. Every building includes PE-stamped engineering prepared for your loads and jurisdiction.
Get instant pricing, then a firm quote with engineering sized to Duchesne County code.