ADUs are allowed in MeridianTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Meridian, ID
Is your property eligible for an ADU?
# of Properties
42,557
Owner-occupied
81%
Zoning districts
18
Avg Home Value
$502,033
Median Lot Size
0.19 acres
Avg Income
$111,203
Residential Types:
42,557 housing units
Other
100%
Zoning Districts:
53,210 parcels · 18 districts
R-8
43%(22,764)
R-4
40%(21,190)
R-15
10%(5,155)
C-G
2%(1,259)
Other
5%(2,842)
ADU Rules
What can you build in Meridian, ID?
Meridian, 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 internal/attached ADU size is 900 sq ft.
- –Maximum internal/attached ADU size is 50% of the primary dwelling’s floor area.
Detached ADU Size Limits
- –Maximum detached accessory dwelling unit size of 900 sq ft
- –Maximum detached accessory dwelling unit size of 50% of the primary dwelling’s floor area
Owner Occupancy
- –Property owner must reside on the property for more than six months.
Parking
- –2 spaces min (1–2 bed); 4 spaces (3–4 bed); 6 spaces (5+ bed); no max. Garage/carport conversions not allowed unless parking is provided on-site; parking must be on the same lot. Alternatives (shared parking or transit-based reductions) may be approved per Sec 11-3C-7.
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.
Ada County