ADUs are allowed in Sullivans IslandTypes:Detached
Types:Detached
Accessory Dwelling Unit (ADU) Rules for Sullivans Island, SC
Is your property eligible for an ADU?
# of Properties
1,086
Owner-occupied
80%
Zoning districts
5
Median Lot Size
0.47 acres
Avg Income
$195,035
Residential Types:
1,086 housing units
Single Family
85%
Apts (4+ units)
7%
Other
8%
Zoning Districts:
1,156 parcels · 5 districts
RS
97%(1,117)
CC
2%(20)
PF
1%(10)
RC-2
1%(8)
Other
0%(1)
ADU Rules
What can you build in Sullivans Island, SC?
Sullivans Island, SC follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not permitted
- –Detached ADU: Special Permit
Detached ADU Size Limits
- –Maximum ADU size of 1,200 sq ft of heated space for a historic-structure ADU, allowed only by special exception.
Owner Occupancy
- –Owner must occupy the principal residence on the property
Rental Restrictions
- –Short-term/vacation rentals prohibited island-wide.
- –Attached ADU: deed restrictions prohibiting rental as a separate dwelling.
- –Historic ADU may be rented long-term only if the principal structure is owner-occupied and a current business license is held on the same property.
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 South Carolina municipalities
Rules change at the town line. Check the municipality your property is actually in.
Charleston County