Weber County, UT Accessory Structures: ADU Owner Occupancy (2026)

Under Land Use Code Section 108-19-3, the county's General Provisions for accessory dwelling units set occupancy as a standing condition of legality, not just an application checkbox. Either the ADU or the primary dwelling must be owner-occupied, and while the owner is away they may not turn around and rent out the unit they otherwise live in themselves; the code treats that as evading the occupancy requirement. The unit that is not owner-occupied is limited to no more than one family, keeping the property functioning as a single-family lot with one accessory unit rather than a duplex.

The requirement carries through to permitting: Section 108-19-5 requires the applicant to submit written verification that they own the property, have permanent residency in the existing single-family dwelling, and will remain an owner-occupant, before Planning Division staff will issue a land use permit for an ADU. Only one ADU is allowed per parcel with a single-family dwelling under Section 108-19-3. County authorization from the Fire Authority, Addressing Official, Culinary Water Authority, Sanitary Sewer Authority, and Building Official is also required before the unit can be occupied. These occupancy standards apply only in the unincorporated county; cities such as Ogden, Roy, and North Ogden administer their own separate ADU rules.