

ADUs are allowed in American FallsTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for American Falls, ID
Is your property eligible for an ADU?
# of Parcels
1,662
Zoning districts
5
Avg Parcel Value
$206,083
Median Parcel Size
0.22 acres
Zoning Districts:
1,661 parcels · 5 districts
RA
43%(717)
RB
39%(653)
HC
9%(146)
CC
5%(82)
Other
4%(63)
ADU Rules
What can you build in American Falls, ID?
American 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
Owner Occupancy
- –Owner-occupancy not required for ADUs
Parking
- –2 spaces per dwelling unit; off-street parking required citywide; CC district allows on-street parking; must be within 100 ft of the dwelling; no ADU-specific waivers/reductions found
Rental Restrictions
- –Accessory apartment within a single-family dwelling must be maintained solely for family use; renting to non-family is prohibited (including short-term rentals).
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs