ADUs are allowed in Unincorporated GemTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Gem, ID
Is your property eligible for an ADU?
# of Properties
1
Zoning districts
20
Zoning Districts:
8,241 parcels · 20 districts
A2
32%(2,607)
A3
21%(1,727)
A1
21%(1,694)
R2
17%(1,394)
Other
10%(819)
ADU Rules
What can you build in Unincorporated Gem, ID?
Unincorporated Gem, 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 1,800 sq ft gross floor area for an internal or attached ADU
Detached ADU Size Limits
- –Maximum ADU size of 1,800 sq ft of gross floor area.
Owner Occupancy
- –Owner occupancy not required.
Parking
- –1 space/ADU; driveway shared with the principal dwelling (separate driveway may be allowed with permit if site constraints exist); reductions may apply where transit exists or demand is low
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
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.
Gem County