ADU rules for Wilmington
Accessory Dwelling Unit (ADU) Rules for Wilmington, DE
Is your property eligible for an ADU?
# of Properties
24,865
Owner-occupied
45%
Zoning districts
35
Median Lot Size
0.04 acres
Avg Income
$72,027
Residential Types:
24,865 housing units
Other
100%
Zoning Districts:
25,149 parcels · 35 districts
R-3
64%(16,028)
R-2
15%(3,744)
C-2
4%(910)
R-1
4%(899)
Other
14%(3,568)
ADU Rules
What can you build in Wilmington, DE?
Wilmington, DE 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
Owner Occupancy
- –No owner-occupancy requirement for ADUs.
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 Delaware municipalities
Rules change at the town line. Check the municipality your property is actually in.
New Castle County