ADUs are allowed in SmithfieldTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Smithfield, UT
Is your property eligible for an ADU?
# of Properties
4,372
Owner-occupied
83%
Zoning districts
18
Avg Home Value
$503,935
Median Lot Size
0.28 acres
Avg Income
$100,459
Residential Types:
4,372 housing units
Land Residential
100%
Zoning Districts:
5,596 parcels · 18 districts
R-1-10
41%(2,315)
R-1-12
29%(1,624)
MPC
11%(619)
RM
10%(564)
Other
8%(474)
ADU Rules
What can you build in Smithfield, UT?
Smithfield, UT follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: Conditional Use Permit
Interior / Attached ADU Size Limits
- –Maximum ADU size is the lesser of 1,500 sq ft or 75% of the size of the original dwelling.
Detached ADU Size Limits
- –Maximum detached ADU size of 1,500 sq ft (livable area).
- –Maximum detached ADU size of 75% of the original dwelling unit’s habitable floor area.
Max Units
- –2 ADUs per single-family lot: 1 attached + 1 detached
Owner Occupancy
- –Owner must occupy at least one unit on the lot
Parking
- –1 space/ADU; dedicated off-street hard-surfaced parking per ADU; in addition to primary dwelling parking; no transit-based reductions or exemptions; no maximum specified
Rental Restrictions
- –Covenants may prohibit short- or long-term rental of the Dwelling (including detached ADUs) on covenanted lots.
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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Is your property eligible for an ADU?
ADU rules in other Utah municipalities
Rules change at the town line. Check the municipality your property is actually in.
Cache County