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Charleston County Zoning Classifications

Summary of Density / Dimensional Requirements from Chapter 4

District Name MAXIMUM DENSITY
(dwelling units per acre)
MINIMUM LOT AREA
(sq ft unless otherwise specified)
MINIMUM LOT WIDTH
(feet)
MINIMUM SETBACKS 1
(feet)
OCRM Critical Line
(feet)
MAXIMUM BUILDING COVER MAXIMUM HEIGHT
(feet)
Front/Street Side Interior Side Rear
RMResource Management1 / 25 2 1 acre1355015305030% of lot35
AG-15Agricultural Preservation1 / 153 acres1355015305030% of lot35
AG-10Agricultural Preservation 3 1 / 101 acre1355015305030% of lot35
AG-8Agricultural Preservation 3 1 / 81 acre1355015305030% of lot35
AGRAgricultural/ Residential 3 1 / 130,0001005015305030% of lot35
RR-3Rural Residential 3 1 / 330,0001005015305030% of lot35
S-3Special Management 3 3 3 / 114,500 12,500 12,500 4 80 70 70 4 2515253530% of lot35
R-4Single Family Residential 4 3 4 / 114,500 10,000 7,250 4 60255153530% of lot35
M-8Mixed Style Residential 88 / 1 12150/5 5 103550% of lot4 stories/50
M-12Mixed Style Residential 1212 / 1 12150/5 5 103550% of lot4 stories/50
MHSLow-Density Manufactured
Housing Subdivision
6 / 15,00050255153530% of lot35
MHPManufactured Housing
Park 67
10 / 1MINIMUM PARK AREA
1 acre
255103535% of lot35
ORResidential Office 678  6,0005025555035% of lot35
OGGeneral Office 67  2,0005025555040% of lot35
CNNeighborhood Commercial 67  4,000152510105025% of lot35
CTCommercial Transition 678  not designated100 / 200 9     3000 / 5000 gross sq ft 10 35
CRRural Commercial 7  40,0001252515255040% of lot35
CCCommunity Commercial 1112  4,00015NoneNoneNone5035% of lotNo Maximum
IIndustrial 67  15,0007050NoneNone50No MaximumNo Maximum
PDPlanned Development: no rights of development apply to a PD zoning designation other than those of the approved plan

Notes:

1.   Front/Street Side Setback reductions of 15 feet may be approved by the Planning Director when deemed compatible with existing development patterns or setbacks shown on approved plats.

2.   On tracts of 100 or more acres, where lots ranging from one to three acres are created, a bonus of one dwelling shall be allowed on the residual area of the parent tract.

3.   Property within the (AG-10?) AG-8 or any AGR, RR-3, S-3, or R-4 zoning district may be approved for subdivision and development of affordable housing as certified by Charleston County. (See Section 6.4.19) The following density/intensity and dimensional standards apply to qualified affordable housing:

Zoning District Maximum Density Minimum Lot Area Other Dimensional Standards Uses
AG-101 dwelling unit per 5 acres1 acresame as AG-10Single family detached units only
AG-83 dwelling units per acre8,000 sq ftsame as R-4Single family detached units only
AGR and RR-33 dwelling units per acre8,000 sq ftsame as R-4Single family detached units only
S-34 dwelling units per acre8,000 sq ftsame as R-4Single family detached units only
R-46 dwelling units per acre4,000 sq ftsame as R-4Single family attached housing units and duplexes allowed

4.   When three figures are listed for Minimum Lot Area or Width, the first is for lots with neither public water nor sewer, the second figure is for lots with water or sewer but not both, and the third for lots with both water and sewer.

5.   Zero lot line homes may be built with no setback on one side of the property, but must have at least 10 feet of separation between buildings.

6.   Single family detached dwelling units in the MHP, OR, OG, CT, CN, and I zoning districts in the Urban/Suburban Area shall comply with the density/intensity and dimensional standards of the R-4 zoning district. (See Section 6.4.25)

7.   A maximum of one single family detached dwelling unit shall be allowed per Lot of Record in the MHP, OR, OG, CT, CN, CC, CR, and I zoning districts in the Rural Area. Unit must meet all dimensional standards of the non-residential zoning district in which it is located.(See Section 6.4.25)

8.   Residential uses in the OR and CT districts shall be subject to the density/intensity and dimensional standards of the R-4 district.

9.   Without shared access 200 feet; with shared access 100 feet.

10.  1-199 feet road frontage 3,000 gross sq. ft.; 200+ feet road frontage 5,000 gross sq. ft.

11.  Residential uses in the CC district shall be subject to the density/intensity and dimensional standards of the M-12 district.

12.  Single family detached dwelling units in the CC zoning district in the Urban/Suburban Area shall comply with the density/intensity and dimensional standards of the M-12 zoning district.(See Section 6.4.25)