ADUs are allowed in AmmonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Ammon, ID
Is your property eligible for an ADU?
# of Properties
20
Zoning districts
19
Zoning Districts:
7,542 parcels · 19 districts
R-1
35%(2,673)
RP-A
20%(1,489)
R-1A
12%(934)
R-2
9%(642)
Other
24%(1,804)
ADU Rules
What can you build in Ammon, ID?
Ammon, 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 900 sq ft for an internal or attached ADU
- –Maximum size of 75% of the principal residence’s gross floor area for an internal or attached ADU
Detached ADU Size Limits
- –Maximum size of 900 sq ft
- –Maximum size of 75% of the principal residence floor area
Max Units
- –Citywide: 1 ADU per lot.
- –Single-family detached: 1 ADU per lot (attached or detached); Duplex or multifamily: 0 per lot; ADU type: Attached or detached: 1 per lot; JADU: none specified.
Parking
- –0 spaces per ADU; max 1 space per ADU (Downtown District: 0.5); Director may adjust min or max by up to 50% on a case-by-case basis
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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ADU rules in other Idaho municipalities
Rules change at the town line. Check the municipality your property is actually in.
Bonneville County