Building Setbacks & Zoning in Dorchester County, SC (2026)
3 rules for unincorporated Dorchester County, South Carolina.
Verified from official government sources
Setback Rules
Dorchester County's zoning ordinance sets minimum front, side and rear yards for every unincorporated district: 30/10/35 feet in the Suburban Residential (SR) district, 25/7.5/25 feet in R-1, and as little as 20/5/20 feet in R-3, with corner lots carrying two 15-foot front yards. The Zoning Administrator enforces the standards under Ordinance 04-13.
Dorchester County Yard Setback Minimums by Zone
Some RestrictionsDorchester County Zoning and Land Development Standards (Ord. No. 04-13), § 7.1.5(c)
(b) All lots must be a minimum of 120 feet in width. (c) The following minimum yards must be provided: Front yard 30 feet Side yard 10 feet Rear yard 35 feet
Structure Height Limits
Dorchester County caps residential structures at two stories under Section 7.3.6 of the Zoning and Land Development Standards, the same limit repeated in every Article VII residential district. A structure may rise higher only if the fire department certifies it can serve a taller building, including through sprinklers, and states the maximum height that certification supports.
Dorchester County Residential Height Limit Rules
Some RestrictionsDorchester County Zoning and Land Development Standards (Ord. No. 04-13) § 7.3.6, Height Limitations (R-2, R-2(M) District)
No structure shall be more than two (2) stories in height, unless the entity providing fire protection service certifies either: (a) that it can provide adequate fire protection service to a taller structure at the site in question; or (b) that the proposed structure incorporates fire protection systems, such as sprinklers, that will provide adequate fire protection to a taller structure at the...
Lot Coverage Limits
Dorchester County's Suburban Residential (SR) district caps single-family lots at 50% impervious surface coverage and non-residential uses at 30%, per Section 7.1.6 of the Zoning and Land Development Standards. The denser R-2 and R-2(M) district allows more coverage: 60% for single-family and manufactured housing and 40% for non-residential uses, under Section 7.3.7.
Dorchester County Max Lot Coverage Rules
Some RestrictionsDorchester County Zoning and Land Development Standards (Ord. No. 04-13) § 7.1.6, Maximum Impervious Surface (SR District)
(a) For non-residential uses in the SR district, no more than 30% of the gross acreage of a parcel shall be covered by impervious surface. (b) For single-family detached use in the SR district, no more than 50% of the gross acreage of a parcel may be covered by impervious surface. These maximum impervious surface requirements may be superseded by specific development guidelines adopted by Dorch...
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