ADUs are allowed in Unincorporated Box ElderTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Box Elder, UT
Is your property eligible for an ADU?
# of Properties
1
Zoning districts
40
Zoning Districts:
27,015 parcels · 40 districts
MU-160
45%(12,092)
GBT
20%(5,537)
NZ
8%(2,266)
MU-40
5%(1,251)
Other
22%(5,869)
ADU Rules
What can you build in Unincorporated Box Elder, UT?
Unincorporated Box Elder, UT follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: Conditional Use Permit
Detached ADU Size Limits
- –Maximum ADU size is less than 40% of the primary residence’s square footage.
Max Units
- –Single-family lots: max 1 total ADU per lot (1 detached ADU or 1 internal ADU, not both). Multifamily/other principal structures: ADUs/IADUs not applicable.
Owner Occupancy
- –Owner must occupy principal unit or ADU or IADU as permanent residence.
Parking
- –1 space/ADU; no max stated; general off-street standards apply (minimum stall size 9'×20' and no parking in required front-yard setbacks)
Rental Restrictions
- –Short-term rentals (<30 days) prohibited; no subleasing.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Utah municipalities
Rules change at the town line. Check the municipality your property is actually in.
Box Elder County