ADUs are allowed in MillsboroTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Millsboro, DE
Is your property eligible for an ADU?
# of Parcels
5,441
Zoning districts
12
Avg Parcel Value
$333,654
Zoning Districts:
5,531 parcels · 12 districts
HR
70%(3,865)
MR
22%(1,197)
HC
3%(142)
MH
2%(134)
Other
3%(193)
ADU Rules
What can you build in Millsboro, DE?
Millsboro, DE 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 800 sq ft for an internal or attached ADU in the Traditional Neighborhood Development (TND) zone.
Detached ADU Size Limits
- –Maximum size of 800 sq ft for secondary dwelling units in TND zones.
Max Units
- –1 ADU per detached single-family house
- –10% of total single-family attached and detached units in the TND
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –1 space/ADU minimum; unrestricted ingress/egress; maximum not specified; in TND, adjacent on-street parking may count toward the minimum; access via alley or rear lane when available.
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 Delaware municipalities
Rules change at the town line. Check the municipality your property is actually in.
Sussex County