ADUs are allowed in Unincorporated JeffersonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Jefferson, ID
Is your property eligible for an ADU?
# of Properties
1
Zoning districts
19
Zoning Districts:
14,316 parcels · 19 districts
R-1
32%(4,557)
R-5
29%(4,126)
AG-40
15%(2,146)
AG-10
15%(2,141)
Other
9%(1,346)
ADU Rules
What can you build in Unincorporated Jefferson, ID?
Unincorporated Jefferson, 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 size of 1,200 sq ft of gross floor living area for an internal ADU (in-home apartment).
Detached ADU Size Limits
- –Maximum detached accessory dwelling unit size is 1,200 sq ft of gross floor living area.
Max Units
- –1 ADU per lot or parcel where permitted by the zone.
- –Cottage clusters: up to 2 ADUs per cottage cluster in detached garages.
Owner Occupancy
- –No owner-occupancy restriction.
Parking
- –Cottage Housing Developments: one parking space per ADU; ADUs must share an access/driveway with the principal dwelling.
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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Learn the key rules and size limits for ADUs