ADU Rules in South Carolina (2026)
ADU rules in South Carolina — no statewide ADU law. Regulation is entirely local. Key provisions and city-specific frameworks for accessory dwelling units.
Law Name
Preempts Local Ordinances
No — local rules may be stricter
Has State Law
No — regulation is local
Statewide Preemption Status Unconfirmed
No statewide preemption statute was confirmed for this jurisdiction — regulation is local. Local governments retain full authority to set their own rules.
Local Control Framework
South Carolina does not have a statewide ADU law as of 2026 · Source
ADU regulation is left entirely to local municipalities and counties · Source
South Carolina Code of Laws Title 6 (Local Government) grants municipalities and counties broad zoning authority · Source
Charleston, Columbia, Greenville, and Myrtle Beach set their own local ADU rules · Source
South Carolina's coastal communities face unique housing supply pressures but address them through local regulations · Source
South Carolina has not enacted statewide housing preemption as of 2026 · Source
Source: South Carolina Local Zoning Authority. Last verified April 5, 2026. View source