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Charleston County, SC Building Setbacks & Zoning: Structure Height Limits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified July 2026

Key Facts

R-4 max height
35 feet
AGR max height
35 feet
Measured from
Base flood elevation to roof
Exempt items
Chimneys, cupolas, flagpoles, antennas
Code section
ZLDR §4.2.4; Tables 4.10.3, 4.79.3

Summary

In most residential districts, including R-4 Single Family Residential and rural AGR, the maximum building height is 35 feet, measured from base flood elevation to the roof. Height is defined by roof type, and items like chimneys, cupolas, flagpoles, and rooftop mechanical appurtenances are exempt from the limit.

City-specific rules exist: Charleston has its own structure height limits rules that differ from Charleston County's county-level regulations. If you live in Charleston, check the city-specific page instead.

Building height refers to the vertical distance between the base flood elevation and: (1) the average height level between the eaves and ridge line of a gable, hip or gambrel roof; (2) the highest point of a mansard roof; or (3) the highest point of the coping of a flat roof.

View official code

Full Breakdown

ZLDR §4.2.4 measures building height as the vertical distance from base flood elevation to the average height between eaves and ridge of a pitched roof, the highest point of a mansard roof, or the coping of a flat roof: an important coastal adjustment for flood-elevated homes. Table 4.10.3 (R-4) and Table 4.79.3 (AGR) both cap maximum height at 35 feet. Exceptions to the height limit include farm buildings in agricultural districts, chimneys, cupolas, spires, flagpoles, antennas, and rooftop mechanical structures occupying no more than one-third of the roof area (§4.2.4.B).

Violations & Fines

Exceeding the district height limit without a variance is a violation; the county can withhold or revoke permits and require corrective action or a zoning variance.

Frequently Asked Questions

How tall can I build a house?
In the R-4 and AGR districts the maximum building height is 35 feet, measured from base flood elevation to the roof per ZLDR §4.2.4.
Does a chimney count toward the height limit?
No. Chimneys, cupolas, spires, flagpoles, antennas, and certain rooftop mechanical structures are exempt from the height limit (ZLDR §4.2.4.B).

Sources & Official References

Other rules in Charleston County

Noise Ordinances: Quiet HoursSome RestrictionsNoise Ordinances: Construction HoursSome RestrictionsSetback RulesSome RestrictionsLot Coverage LimitsSome RestrictionsNoise Ordinances: Leaf Blower RulesSome RestrictionsNoise Ordinances: Decibel LimitsSome RestrictionsNoise Ordinances: Amplified Music & Outdoor SoundSome RestrictionsNoise Ordinances: Vehicle NoiseSome Restrictions

All Charleston County rules

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Structure Height Limits in Cities Across Charleston County

Charleston, SCNorth Charleston, SC