ADU rules in Utah County, UT — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Utah County must allow accessory dwelling units in unincorporated residential zones under state law (Utah Code §17-80-303). County regulations may impose owner-occupancy, parking, and minimum lot size requirements.
Utah Code §17-80-303 requires Utah County to permit internal accessory dwelling units (IADUs) in residential zones. For detached ADUs, Utah County may regulate under its Land Use Ordinance. Permissible county restrictions include: owner-occupancy requirements, prohibition of short-term rental of IADUs, minimum lot size requirements (typically 6,000 sq ft or more), additional parking requirements, and design compatibility standards. Contact Utah County Community Development for specific ADU requirements by zone. Building permits are required for all ADU construction.
Unpermitted ADU: standard building code enforcement. May require demolition or legalization. Occupying unpermitted dwelling: code violation.
Utah County, UT
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See how Utah County's adu rules rules stack up against other locations.
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