ADUs are allowed in Milwaukee CityTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Milwaukee City, WI
Is your property eligible for an ADU?
# of Properties
142,383
Owner-occupied
63%
Zoning districts
60
Avg Home Value
$266,547
Median Lot Size
0.12 acres
Avg Income
$62,748
Residential Types:
142,383 housing units
Other
100%
Zoning Districts:
159,671 parcels · 60 districts
RT4
20%(32,352)
RS6
19%(30,968)
RT3
12%(19,282)
RT2
11%(17,683)
Other
37%(59,386)
ADU Rules
What can you build in Milwaukee City, WI?
Milwaukee 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 size of 1,000 sq ft
Detached ADU Size Limits
- –Maximum ADU size is the greater of 1,300 sq ft or 16% of lot area, but not more than 1,600 sq ft (also limited by the largest dwelling unit’s floor area, not modeled).
Max Units
- –1 ADU per parcel (municipality-wide).
- –Single-family: 1 ADU per lot (internal/attached/detached as allowed); Two-family: 1 ADU per lot, detached only.
- –RS/RT: 1 detached ADU per parcel; Multifamily: 0 ADUs; RM1–RM3: 1 detached ADU per parcel; RM4–RM7/RO1–RO2: no new detached ADU if 2 principal buildings or a principal + detached.
Owner Occupancy
- –Owner must occupy the principal dwelling as the primary residence.
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 Wisconsin municipalities
Rules change at the town line. Check the municipality your property is actually in.
Washington County
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