In unincorporated Charleston County, fences may sit within required setbacks but cannot obstruct roadway sight lines between three and ten feet above grade, and a 15-foot vision-clearance triangle must be kept clear at residential driveways. Fences also cannot block natural drainage or sit unlawfully in easements.
ZLDR §4.2.3.A.2 lets fences, hedges, and walls stand within a required setback, but they cannot obstruct the view of vehicular access to any roadway between three and ten feet above grade. At residential driveways an unobstructed vision-clearance triangle must be maintained, formed by a 15-foot line into the driveway and a 15-foot line along the roadway (Figure 4.2.3). A six-foot opaque fence or wall can also let the Zoning & Planning Director cut a required land-use buffer by up to half (never below a 10-foot vegetated buffer). Fences must not impede drainage.
A fence that blocks the required vision-clearance triangle or obstructs drainage is a violation; the county can require it be lowered, relocated, or removed.
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