ADUs are allowed in Madison CityTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Madison City, WI
Is your property eligible for an ADU?
# of Properties
73,329
Owner-occupied
74%
Zoning districts
102
Avg Home Value
$437,142
Median Lot Size
0.24 acres
Avg Income
$98,052
Residential Types:
73,330 housing units
Single Family
100%
Zoning Districts:
81,542 parcels · 102 districts
SR-C1
26%(20,803)
PD
18%(14,849)
SR-V2
8%(6,275)
TR-C2
7%(5,444)
Other
42%(34,171)
ADU Rules
What can you build in Madison City, WI?
Madison City, WI 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 or attached ADU size of 1,000 sq ft
Max Units
- –8 dwelling units max on a lot (principal)
- –1 attached ADU or 2 detached ADUs on a zoning lot
Owner Occupancy
- –There is no owner-occupancy requirement.
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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Is your property eligible for an ADU?
ADU rules in other Wisconsin municipalities
Rules change at the town line. Check the municipality your property is actually in.
Dane County