Cedar City, Parowan, Enoch and Kanarraville: Iron County sits at higher elevation than Washington County to the south, but still carries a notably lighter snow load than the Wasatch Front. A different code story than either of Utah's two other climate zones.
| Code criteria (Iron County) | Value | What it means for your build |
|---|---|---|
| Building-permit threshold | 200 sq ft (no electrical/plumbing/mechanical) | Over 200 sq ft, or adding utilities at any size, requires a permit. |
| Ground snow load | ≈30 psf (Cedar City, ~5,831 ft) | Lighter than the Wasatch Front despite higher elevation. Southern Utah's drier climate. Parowan runs slightly higher (~32 psf). |
| Design wind speed | Confirm per site | No single county-wide figure confirmed. Your engineer determines the exact value. |
| Seismic design category | D (confirm per site) | Southern Utah's seismic belt. Engineered anchorage required, similar to Washington County. |
| Frost / footing depth | ≈30″+ (confirm exact depth) | Higher elevation than Washington County. Likely deeper than St. George's shallow frost line. |
| Adopted codes | 2021 I-codes · 2020 NEC | Statewide since July 1, 2023. |
Figures shown are representative Cedar City values. Your engineer determines exact site values for wind and frost depth. Verify permit specifics with your city building department.
Iron County allows up to 200 sq ft of accessory structure without a building permit, as long as you don't add electrical, plumbing or mechanical systems. Anything over 200 sq ft. Or any size with utilities added. Requires a permit. A metal garage or shop with a foundation and electrical always needs one.
Cedar City sits at roughly 5,831 ft, higher than most of the Wasatch Front valley floor, but Iron County's drier climate keeps the design snow load lighter, around 30 psf. That's a different profile than both Washington County's desert-light load (21 psf) and the Wasatch Front's heavier loads (28–43 psf). We size your engineering to Iron County's actual numbers, not a generic statewide assumption.
Up to 200 sq ft is exempt if no electrical, plumbing or mechanical is added. Over 200 sq ft, or adding utilities at any size, requires a permit.
Iron County's climate is drier than northern Utah, which keeps the design ground snow load lighter. About 30 psf at Cedar City versus 37–43 psf along parts of the Wasatch Front.
Yes. Every building includes PE-stamped engineering prepared for your loads and jurisdiction.
Get instant pricing, then a firm quote with engineering sized to Iron County code.