Accessory Structures in Aiken County, SC (2026)
2 rules for unincorporated Aiken County, South Carolina.
Verified from official government sources
ADU Rules
Aiken County permits one accessory apartment per single-family, owner-occupied lot as a conditional use under Table 1. The unit cannot exceed 50 percent of the main house's floor area or 1,300 square feet, whichever is smaller, and cannot contain more than two bedrooms.
Aiken County Accessory Apartment Standards
Some RestrictionsAiken County Code § 24-3.17(1)-(2), (4)
Accessory apartments, where permitted by Table 1 as conditional uses, shall meet the following conditions:(1)The apartment, whether attached or detached, cannot exceed fifty (50) percent gross floor area of the principal dwelling or one thousand three hundred (1,300) feet, whichever is less, or contain more than two (2) bedrooms;(2)The apartment must be a complete living space, with kitchen and...
Shed & Carport Rules
Aiken County caps accessory buildings like sheds at 20 feet tall in the buildable area, or 12 feet if placed in a required setback, under Section 24-8.6. On parcels under two acres in residential districts, total accessory floor area cannot exceed half the size of the house it serves.
Aiken County Shed Size and Setback Rules
Some RestrictionsAiken County Code § 24-8.6(2), (4)c
(2)When located within the buildable area in any zoning district, accessory buildings may be constructed to a height of twenty (20) feet. If located in a required setback area, said buildings shall not exceed twelve (12) feet in height... (4)c.On parcels of less than two (2) acres, the area of the accessory buildings shall not exceed fifty (50) percent of the gross floor area of the principal s...
All Aiken County ordinances
See every category we cover for Aiken County: parking, noise, fences, fires, animals, pools, and more.
Aiken County Ordinance Hub →