ADUs are allowed in GrantsvilleTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Grantsville, UT
Is your property eligible for an ADU?
# of Properties
4,264
Owner-occupied
80%
Zoning districts
20
Avg Home Value
$499,416
Median Lot Size
0.41 acres
Avg Income
$101,190
Residential Types:
4,264 housing units
Other
100%
Zoning Districts:
6,528 parcels · 20 districts
R-1-21
32%(2,078)
RM-7
24%(1,580)
RR-1
12%(805)
R-1-8
11%(698)
Other
21%(1,367)
ADU Rules
What can you build in Grantsville, UT?
Grantsville, 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: By Right
Interior / Attached ADU Size Limits
- –Maximum size up to the principal dwelling’s floor area
Max Units
- –1 ADU per single-family dwelling (IADU or DADU)
- –Duplex/multifamily: 0 ADUs
Owner Occupancy
- –Owner of record must occupy either the principal dwelling or ADU
Parking
- –1 space/ADU; no ADU-specific max; citywide cap 4 outdoor spaces per residential lot; exceptions: no parking in front or side yard setbacks adjacent to streets except in an approved driveway; if garage parking is displaced by an internal ADU, equivalent stalls must be replaced on-site; staff reviews ADU site plans to determine required stalls.
Rental Restrictions
- –Cannot rent both the ADU and the primary dwelling simultaneously except during a Temporary Absentee Ownership period limited to 12 months; extension possible with evidence and a definite termination date.
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.
Tooele County