Aiken County Zoning Ordinance: Districts, Permits, and Variances

The Aiken County zoning ordinance, set out in Chapter 24 of the county’s Code of Ordinances, controls how land is used across unincorporated parts of the county. It divides land into districts, sets minimum lot sizes and setbacks, and requires a zoning permit before you build, demolish, change a use, or alter land. If you own or plan to buy property outside the incorporated cities and towns, the rules below determine what you can do with it.

Zoning Districts in Unincorporated Aiken County

Article II of Chapter 24 establishes the districts. Each one carries its own list of permitted uses and its own dimensional standards, so identifying the correct district is the first step in any project.¹

Residential Districts

RC (Residential Single-Family Conservation): protects single-family neighborhoods and encourages development consistent with existing character.
RD (Residential Multifamily Development): allows duplexes, triplexes, townhouses, apartments, and manufactured homes near major roads and commercial activity.
RM (Residential Limited Mixed Use): permits a limited mix of single-family homes, duplexes, townhouses, patio homes, and manufactured homes.
RH5 (Residential-Horse 5): low-density development on lots of at least five acres, with commercial activity limited to equine-related uses.
RH5B (Residential-Horse Business): the same base as RH5, plus selected agricultural and equestrian businesses.
OR (Office Residential): a mix of office, institutional, and residential uses in transitioning areas.

Rural Districts

AP (Agricultural Preservation): protects farm and forest land from premature development. Subdivisions are limited to ten or fewer lots, and minimum lot size is two acres.
RUD (Rural Development): supports agriculture and low-intensity development with minimum lot sizes of about one acre (43,500 square feet).
RUC (Rural Community): sustains existing rural communities while allowing development that strengthens local economies.
RRC (Residential Rural Commercial): preserves residential and agricultural character while permitting small-scale commercial and recreational uses.

Commercial and Industrial Districts

NC (Neighborhood Commercial): convenience-type goods and services for nearby residential areas. Minimum lot size for non-residential uses is 5,000 square feet.
LD (Limited Development): multi-use development along major transportation corridors, with controls on aesthetics and compatibility.
UD (Urban Development): higher-intensity urban uses with smaller lots and tighter setbacks.
IND (Industrial Development): wholesaling, distribution, warehousing, manufacturing, and offices in business park settings. Minimum non-residential lot size is 20,000 square feet, and front setbacks on arterial roads run 100 feet.

Overlay Districts That Add Extra Rules

Overlay districts sit on top of the base zoning already assigned to a parcel. When an overlay rule conflicts with the underlying district, the stricter standard applies.¹

FHO (Flood Hazard Overlay): regulates development in flood-prone areas.
HCO (Highway Corridor Overlay): applies to primary commercial corridors entering municipalities, with a focus on appearance and traffic flow.
AO (Airport Overlay): restricts height and certain uses near airport facilities.
PUD (Planned Use District): allows flexible, mixed-use development under a master plan rather than a fixed list of permitted uses.

Setbacks, Lot Sizes, and Building Standards

Table 2 of the ordinance lists the minimum lot areas, setbacks, height limits, and impervious surface ratios for every district. Building in the wrong place relative to a property line is one of the most common permit problems, so the numbers deserve close attention.

Front setbacks depend on the road type. In most residential and commercial districts, the front setback is 50 feet from an arterial road, 40 feet from a collector road, and 30 feet from a local road. Rural and industrial districts require more space. IND setbacks jump to 100, 75, and 50 feet respectively. In the AP district, manufacturing buildings must sit at least 100 feet from any property line.¹

Side setbacks for residential uses are typically 10 feet in most districts, dropping to 5 feet in UD, LD, and IND. Rear setbacks for residential uses are 20 feet across all districts. Non-residential rear setbacks range from 10 feet in OR to 40 feet in RC, RH5, HCO, and AP.¹

Minimum lot width at the building line is 80 feet in most residential districts, 100 feet in IND, 50 feet in RUC, and 40 feet in NC, UD, LD, and HCO. Buffer and screening rules kick in when a higher-intensity use borders a lower-intensity zone, which can mean a vegetative screen or solid fence.

How to Look Up Your Property’s Zoning

Before you plan anything, confirm the current designation. Aiken County offers an interactive zoning map through its GIS system, reached from the county’s Maps page. You can also search by Tax Map Number (TMS) through the county’s Beacon Property Map tool. The TMS is printed on your property tax bill and your deed, and it is the unique identifier used in all county records.

If the map or the district rules are not clear, the Planning and Development Department will help. Call 803-642-1520 or email planning@aikencountysc.gov.²

Applying for a Zoning Permit

New construction, a change of use, or land alteration in unincorporated Aiken County requires a zoning permit before work begins. South Carolina law makes it unlawful to construct, alter, demolish, or change the use of land or a building without first obtaining the appropriate permit.³

A typical application asks for:

The Tax Map Number (TMS) for the parcel.
The legal description of the property from your deed.
A clear statement of intended use, so staff can check it against permitted uses in the district.
A site plan showing lot dimensions, existing and proposed structures, and precise distances from each structure to the property lines.

Aiken County handles permits and development approvals through its Development Services Online Portal, where you apply, check review status, pay fees, and track zoning board actions.² Fees can be paid by credit card in person or by phone. Staff review the submission against Chapter 24 for conflicts with easements, environmental constraints, and district-specific rules. If more information is needed, the department will contact you. A denial comes with a written explanation identifying the specific ordinance provisions your proposal did not meet.

Variances and Appeals

When applying the rules strictly would create an unnecessary hardship, you can ask the Board of Zoning Appeals for a variance. A variance is a narrow exception to dimensional or design requirements on a specific parcel. It is not a rezoning, and the bar is high.

State law allows the Board to grant a variance only if it makes written findings on all four of the following:⁴

The property has extraordinary and exceptional conditions specific to that parcel.
Those conditions do not generally apply to nearby properties.
Because of those conditions, applying the ordinance as written would effectively prohibit or unreasonably restrict use of the property.
Granting the variance will not substantially harm neighboring properties or the public good, and will not damage the character of the district.

The Board cannot grant a variance that allows a use not otherwise permitted in the district, physically extend a nonconforming use, or change district boundaries. The chance to make more money from the property is explicitly excluded as a reason.⁴

If you disagree with a decision by the zoning administrator, you can appeal to the Board of Zoning Appeals. The appeal must be filed within the timeframe set in the county’s zoning ordinance or the Board’s rules. If no local deadline applies, state law sets a default of 30 days from the date you received actual notice of the decision.⁴ The Board can also permit special exceptions where the ordinance provides for them and remand a matter to the zoning administrator if the record is insufficient.

Rezoning

If your intended use does not fit the current district at all, you need a rezoning rather than a variance. Rezoning changes the district designation of your property. It involves the Aiken County Planning Commission and County Council, and it requires at least one public hearing where neighbors and other interested parties can speak.

Rezoning decisions must be consistent with the county’s Comprehensive Plan. Council weighs traffic impact, infrastructure capacity, compatibility with surrounding land uses, and alignment with the long-term growth vision for the area. Applications go through the Development Services Online Portal.⁵

Nonconforming Uses

If a property was used lawfully before a zoning change made that use noncompliant, the existing use is generally allowed to continue. This is a nonconforming use, and it comes with limits. You usually cannot expand or intensify the use, and if it stops for an extended period, the right to resume it can be lost. The specifics for Aiken County appear in Chapter 24.

This matters most when you are buying. If a seller says a property has operated as a small commercial shop in a residential district, confirm the use has been continuous. A gap could mean the nonconforming status has expired, leaving you unable to reopen the business without a rezoning or variance.

Enforcement and Penalties

Aiken County enforces the ordinance through permit denials and stop-work orders. If you build without a zoning permit or violate the terms of an approved one, the zoning administrator can issue a stop order halting activity on the site.³

Under state law, violating a zoning ordinance is a misdemeanor, and each day the violation continues counts as a separate offense. Beyond criminal penalties, the county attorney or even a neighboring property owner who would be specially damaged by the violation can ask a court to enjoin the illegal use, order noncompliant construction removed, or otherwise force correction.³

1
Municode Library. Article II – Code of Ordinances – Aiken County, SC
2
Aiken County. Planning and Development
3
South Carolina Legislature. South Carolina Code of Laws – Title 6 Chapter 29 – South Carolina Local Government Comprehensive Planning Enabling Act of 1994
4
South Carolina Legislature. South Carolina Code Section 6-29-800 – Powers of Board of Zoning Appeals
5
Aiken County. Development Services Online Portal