ADUs are allowed in Idaho FallsTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Idaho Falls, ID
Is your property eligible for an ADU?
# of Properties
81
Owner-occupied
60%
Zoning districts
24
Avg Home Value
$272,199
Median Lot Size
1.00 acres
Avg Income
$89,958
Residential Types:
81 housing units
Ag Homesite Land
100%
Zoning Districts:
27,336 parcels · 24 districts
R1
48%(12,993)
TN
16%(4,268)
RP
9%(2,588)
R3A
5%(1,383)
Other
22%(6,104)
ADU Rules
What can you build in Idaho Falls, ID?
Idaho Falls, ID 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 in-home apartment size of 750 sq ft
Detached ADU Size Limits
- –Maximum size of 750 sq ft for a detached accessory dwelling unit (backyard cottage).
Max Units
- –1 ADU per lot
Owner Occupancy
- –Owner must occupy principal dwelling or ADU as primary residence.
Parking
- –1 space/ADU; driveway may be used for this requirement
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 Idaho municipalities
Rules change at the town line. Check the municipality your property is actually in.
Bonneville County