Building permits, zoning and land rules in Colleton County, South Carolina

Yes, for typical construction in unincorporated Colleton County. The county says construction plans and a building permit are typically required, and its Building Permitting & Inspections function issues permits for all construction activity and mobile-home placement^1,2. The county enforces adopted building codes in unincorporated areas, including the statewide-modified residential and building codes². A zoning permit and site plan are also required before establishing a new activity or putting up a new building or addition⁸. We could not confirm which minor repairs might be exempt, so describe the exact work to Planning & Development before assuming a small project can proceed without a permit².

Colleton County Planning & Development is the building department for unincorporated Colleton County, covering building permits and inspections as well as planning, zoning, floodplain management and code enforcement². The office is at 31 Klein Street, Harrelson Building, Room 300, P.O. Box 98 Walterboro, SC 29488; call 843-549-1709, email planning@colletoncounty.org, or call 843-549-1844 for inspections². The county publishes a building-permit application and construction checklists, while plans and a permit are typically required⁹. Current permit fees and the precise inspection sequence could not be confirmed, so ask the office for both when you describe the project².

Yes. Colleton County zoning applies in the unincorporated portions of the county, and municipalities may have separate zoning rules². Zoning Administration reviews site plans, issues permits and enforces the zoning ordinance, and the county publishes a zoning map and a Title 14 ordinance with nine base districts^2,5. Before a new activity, new building or addition begins, the county requires a zoning permit with a site plan⁸. Dimensional rules differ by district. In the RC-1 district, the table lists a 5-acre minimum lot, 150-foot minimum width, 35-foot front setback, 20-foot side setback, 50-foot rear setback and 40-foot maximum structure height⁵. Manufactured homes on individual lots are a conditional use in RC-1, and other districts may differ⁵. A countywide minimum dwelling size could not be confirmed; give Zoning Administration the parcel number and proposed use before buying or building⁸.

For a new home or manufactured home on Colleton County land without public or community sewer, SCDES must approve the site and issue a septic permit before construction or placement, and the county cannot issue the building permit first³. The process includes a site evaluation, a Permit to Construct and an inspection before the installed system is covered³. A Permit to Construct remains valid for 5 years; renewal or modification requires a new application and fee³. Only 5.9% of county soils rate without severe limitations for a conventional drain field, so make septic feasibility an early contract contingency rather than assuming a standard system will work¹⁰. For application questions, contact SCDES Onsite Wastewater at 1-855-731-2504 or OSWWCentral@des.sc.gov¹¹.

Colleton County does not treat private-land RV living as a permanent right. The zoning ordinance allows park-model trailers, campers and RVs as temporary housing in all districts unless restrictive covenants prohibit them, for up to one year such as during construction of a permitted residence, with a six-month extension possible from the zoning board of appeals⁵. Conditions include one unit per lot, a road-ready unit with wheels, axles and hitch, no permanent foundation, no renting it out for income, and electrical service of no more than 100 amps after a septic system is installed⁵. Placement as a principal use is prohibited on Edisto Island⁵. Separately, living in an RV on an individual lot is a special exception in the RC-1 district⁵. The ordinance does not define tiny homes, and these units are not recognized as permanent dwellings under the residential code⁵. Temporary hunting and fishing camps are district-regulated uses, while campgrounds and RV parks may need special-exception approval⁵. Ask Zoning Administration how the proposed unit would be classified⁸.

1. Ask Zoning Administration to confirm the parcel's district and submit the zoning permit application with a site plan⁸.

1. Ask Floodplain Management whether the parcel is in a flood-hazard area; all development in the floodplain requires a permit⁴.

1. Verify sewer availability, and if public or community sewer is unavailable, obtain SCDES site approval and a septic Permit to Construct before the county building permit^3,12.

1. Submit the county building-permit application, required plans and the applicable construction checklist⁹.

1. If acting as owner-builder, personally supervise the work, use licensed contractors where required, sign the disclosure and promptly record the required notice with the register of deeds; sale or rent within two years of completion is presumed to defeat the exemption⁶.

1. Arrange county building inspections and the SCDES septic inspection before the system is covered^2,3.

Start with the zoning district, flood status, legal access, sewer availability and a septic contingency. Zoning controls the allowed use, all floodplain development needs a county permit, and only 5.9% of county soils rate without severe limitations for a conventional drain field^2,4,10. If a seller proposes creating or replatting lots, confirm the approval path with Planning & Development because the department reviews subdivisions and plats in unincorporated Colleton County⁵. Colleton County's median property-tax bill is $883 per year and its effective property-tax rate is 0.6%, but verify the actual parcel assessment before closing¹⁰. A private residential well requires a state Notice of Intent and a $70 fee before construction, and the driller must notify SCDES 48 hours before installation⁷.