

ADU rules for Unincorporated Madison
Accessory Dwelling Unit (ADU) Rules for Unincorporated Madison, IA
Is your property eligible for an ADU?
# of Properties
1,906
Owner-occupied
85%
Zoning districts
6
Avg Home Value
$323,284
Median Lot Size
4.39 acres
Avg Income
$109,561
Residential Types:
1,906 housing units
Residential
100%
Zoning Districts:
13,668 parcels · 6 districts
NZ
98%(13,457)
A-1
0%(65)
I
0%(58)
R
0%(53)
Other
0%(35)
ADU Rules
What can you build in Unincorporated Madison, IA?
Unincorporated Madison, IA follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not addressed in the local bylaw
- –Detached ADU: Not addressed in the local bylaw
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