Ogden, Roy, Riverdale, South Ogden, North Ogden, Farr West, Huntsville, West Haven and Pleasant View: Weber County's biggest gotcha: canyon-mouth areas near Ogden Canyon and the Ogden Valley see elevated downslope winds, similar to Davis County's east bench. And Ogden Valley's higher elevation drives snow loads well above the valley floor.
South Ogden is unusually specific: accessory buildings need 6 ft from the main dwelling, 1 ft from the property line, 10 ft from adjacent buildings, capped at 19 ft overall height. Most other Weber cities (Ogden, Roy, Riverdale, North Ogden) use the 200 sq ft IRC exemption but set their own setbacks under local zoning. Always confirm with your specific city.
| Code criteria (Weber County) | Value | What it means for your build |
|---|---|---|
| Building-permit threshold | 200 sq ft (most cities) | Hooper & Washington Terrace still require zoning/site-plan review under 200 sq ft. |
| Ground snow load | 37 psf Ogden valley (≈4,334 ft) | Ogden Valley (Huntsville, Eden, Liberty) sits well above 5,000 ft. Expect a materially higher engineered load. |
| Design wind speed | ~105–115 mph typical, higher at canyon mouths | Sites near Ogden Canyon warrant a site-specific wind evaluation, like Davis County's east bench. |
| Seismic design category | D2 (confirm per site) | The Wasatch Fault's Ogden segment runs through the county. Engineered anchorage required. |
| Frost / footing depth | 30″ (more at elevation) | Foundation must bear below frost line; deeper in Ogden Valley. |
| Adopted codes | 2021 I-codes · 2020 NEC | Statewide since July 1, 2023. |
Figures shown are representative valley-floor values (Ogden, ~4,334 ft). Weber County is a Utah Snow Load Study "case study" area. Your engineer determines the exact site value. Verify permit and setback specifics with your city building department.
South Ogden is one of the few Weber County cities that spells out exact numbers. They're a useful benchmark. But South Ogden-specific, and neighboring cities set their own:
Ogden Canyon and the Trapper's Loop corridor into Ogden Valley see documented downslope windstorms. If your site sits near one of these zones, we'll flag it early so your engineering accounts for it. Not after you've poured a slab.
In most Weber County cities, a detached accessory building over 200 sq ft needs a building permit. In Hooper and Washington Terrace, even structures under 200 sq ft need a zoning-compliance or site-plan review before you build. A metal garage or shop with a foundation and electrical always needs a permit, regardless of city.
Ogden's valley-floor design ground snow load runs around 37 psf at roughly 4,334 ft elevation. Head up into Ogden Valley. Huntsville, Eden, Liberty, Powder Mountain's lower slopes. And elevation climbs past 5,000 ft, which pushes the engineered load meaningfully higher. We engineer to your address-specific value, not the Ogden baseline.
Over 200 sq ft requires a building permit in most Weber cities. Hooper and Washington Terrace require zoning or site-plan review even under 200 sq ft. Adding electrical or plumbing removes the exemption anywhere.
6 ft from the main dwelling, 1 ft from the property line, 10 ft from adjacent buildings, capped at 19 ft overall height. Other cities set their own. Confirm locally.
About 37 psf at Ogden's valley-floor elevation (~4,334 ft). Ogden Valley (Huntsville, Eden, Liberty) sits well above 5,000 ft and carries a meaningfully higher engineered load. We size it to your exact address.
Yes. Every building includes PE-stamped engineering prepared for your loads and jurisdiction, including canyon-adjacent wind exposure where it applies.
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