ADUs are allowed in Oshkosh CityTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Oshkosh City, WI
Is your property eligible for an ADU?
# of Properties
18,963
Owner-occupied
77%
Zoning districts
64
Avg Home Value
$216,231
Median Lot Size
0.18 acres
Avg Income
$69,558
Residential Types:
18,963 housing units
Single Family
100%
Zoning Districts:
22,149 parcels · 64 districts
SR-9
29%(6,378)
SR-5
25%(5,484)
TR-10
8%(1,866)
SR-3
6%(1,421)
Other
32%(7,000)
ADU Rules
What can you build in Oshkosh City, WI?
Oshkosh 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 800 sq ft for an internal or attached secondary dwelling unit in the Neo-Traditional Development Overlay on single-family lots.
Detached ADU Size Limits
- –Maximum size of 800 sq ft for a detached ADU within the Neo-Traditional Development Overlay; no citywide size cap otherwise.
Max Units
- –1 per lot (NTD-O overlay)
Parking
- –1 off-street space per secondary dwelling unit (NTD-O); citywide minimum none; CMU district parking waived (if provided, 1 space per dwelling unit within 1,000 ft); In-Family Suite: no additional parking beyond principal residence
Rental Restrictions
- –In-Family Suites may not be occupied by a non-family member; building plans must be marked as not a separate dwelling unit or apartment.
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.
Winnebago County