ADUs are allowed in North CharlestonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for North Charleston, SC
Is your property eligible for an ADU?
# of Properties
24,661
Owner-occupied
83%
Zoning districts
34
Median Lot Size
0.17 acres
Avg Income
$65,405
Residential Types:
24,661 housing units
Single Family
82%
Apts (4+ units)
6%
Other
12%
Zoning Districts:
40,317 parcels · 34 districts
R-1
57%(22,995)
R-2
15%(5,875)
PDD
14%(5,588)
B-2
6%(2,529)
Other
8%(3,330)
ADU Rules
What can you build in North Charleston, SC?
North Charleston, SC 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 is the lesser of 800 sq ft or two-thirds of the principal dwelling’s gross floor area; in the Olde North Charleston Historic and Neighborhood Conservation Districts, internal/attached ADUs are not allowed.
Detached ADU Size Limits
- –Maximum size is the smaller of 800 sq ft or two-thirds of the main home’s floor area.
Max Units
- –1 ADU per lot
Owner Occupancy
- –No owner-occupancy requirement
Parking
- –1 space/ADU; no max; waivers in designated street-parking areas; parking may be satisfied via shared or leased parking; ZBA reductions in limited circumstances
Rental Restrictions
- –Short-term rentals prohibited (STR defined as 29 days or less); detached ADUs may be rented only for 30+ day terms.
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