Provo, Orem, Lehi, American Fork, Spanish Fork, Saratoga Springs, Eagle Mountain, Springville and Pleasant Grove: Utah County is the state's fastest-growing region. Most cities use the 200 sq ft permit threshold, but the canyon mouths and benches add wind and snow you need to engineer for.
The valley baseline is about 115 mph, but Utah County funnels wind through several gaps. Provo Canyon, the Point of the Mountain (Lehi / Saratoga Springs), and the Spanish Fork / Diamond Fork canyon mouth see materially higher gusts. If your lot is near a canyon mouth, plan for a site-specific wind evaluation rather than the valley minimum. We engineer to it so your building passes inspection the first time.
| Code criteria (Utah County) | Value | What it means for your build |
|---|---|---|
| Building-permit threshold | 200 sq ft (typical) | Under 200 sq ft is usually permit-exempt but still needs zoning compliance & setbacks. |
| Ground snow load | ≈31 psf (Provo valley floor) | Benches & canyons (Alpine, Cedar Hills, Mapleton foothills) climb well above this. |
| Design wind speed | ≈115 mph · higher at canyon mouths | Provo Canyon & Point of the Mountain warrant a site evaluation. |
| Seismic design category | D2 residential | Wasatch Fault runs the length of the county. Engineered anchorage required. |
| Frost / footing depth | 30″ (more at elevation) | Foundation bears below the frost line. |
| Adopted codes | 2021 I-codes · 2020 NEC | Statewide since July 1, 2023. |
Figures shown are valley-floor / Provo values; benches and canyon areas are higher. Verify with your city building department.
Most Utah County cities follow the IRC default: a detached accessory building up to 200 sq ft is exempt from a building permit. But you may still need a zoning / compliance permit, and the structure must meet your zone's setbacks and height limits. Anything over 200 sq ft, or any building placed on a foundation with electrical, needs a full building permit with engineered drawings.
Some fast-growing cities add their own twist. In Saratoga Springs, for example, sheds under 200 sq ft are permit-exempt but capped at 15 ft in height. Always read your city's accessory-structure ordinance. We'll pull it for your address before you order.
Setbacks are set by your city and zone, not the county as a whole. As a rough guide for unincorporated Utah County residential zones, expect about 30 ft front and 15 ft side & rear; incorporated cities like Provo, Orem and Lehi often allow detached accessory buildings closer to side and rear lines (commonly 1–6 ft) when they sit behind the home. Corner lots and easements change everything. We verify your specific parcel.
Provo's valley floor uses roughly a 31 psf ground snow load. The benches and foothill cities, including Alpine, Cedar Hills, Highland, Mapleton and the Springville foothills, sit higher and carry heavier loads, and canyon properties higher still. We engineer to your address-specific value from the USU Utah Snow Load study, not the valley minimum, so the roof is rated for what actually falls on it.
Most cities exempt detached accessory buildings up to 200 sq ft from a building permit, though you may still need a zoning permit and must meet setbacks. Over 200 sq ft, or any building with a foundation and electrical, requires a full building permit. Confirm with your city.
Utah County's canyon mouths, including Provo Canyon, the Point of the Mountain near Lehi and Saratoga Springs, and Spanish Fork canyon, channel wind well above the 115 mph valley baseline. Lots near those gaps need a site-specific wind rating, which we engineer into the building.
About 31 psf on the Provo valley floor, rising on the benches and foothill cities like Alpine, Cedar Hills and Mapleton. We engineer to your exact address value from the USU Utah Snow Load study.
Yes. Every building includes PE-stamped engineering prepared for your loads and jurisdiction.
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