

ADUs are allowed in ArcoTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Arco, ID
Is your property eligible for an ADU?
# of Parcels
633
Zoning districts
6
Avg Parcel Value
$131,023
Median Parcel Size
0.03 acres
Zoning Districts:
641 parcels · 6 districts
R-1
62%(396)
C
27%(173)
E-P
6%(41)
A-T
3%(22)
Other
1%(9)
ADU Rules
What can you build in Arco, ID?
Arco, 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
Rental Restrictions
- –Detached ADU: rental to non-family prohibited; short-term and long-term rentals barred; occupancy limited to a member of the family occupying the main structure.
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