ADUs are allowed in Mount PleasantTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Mount Pleasant, SC
Is your property eligible for an ADU?
# of Properties
36,025
Owner-occupied
88%
Zoning districts
38
Median Lot Size
0.26 acres
Avg Income
$134,186
Residential Types:
36,025 housing units
Single Family
84%
Apts (4+ units)
12%
Other
4%
Zoning Districts:
39,975 parcels · 38 districts
PD
57%(22,693)
R1
14%(5,654)
R2
9%(3,471)
RM
4%(1,581)
Other
16%(6,576)
ADU Rules
What can you build in Mount Pleasant, SC?
Mount Pleasant, 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 of 850 sq ft for internal or attached ADUs
Owner Occupancy
- –Owner-occupancy required; either the principal structure or ADU must be owner-occupied.
Parking
- –1 private off-street space per ADU; site plan required; tandem spaces allowed only if serving the ADU; on-street parking cannot count toward off-street requirements, but may count up to 50% where allowed.
Rental Restrictions
- –STRs allowed with permit; but ADU/primary unit may not be rented separately if owner not on site; ADU occupancy limited to 3; minimum 24 nights and four bookings annually; STRs prohibited on residential parcels in Old Village Historic District; STRs prohibited where covenants prohibit STRs.
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