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

Yes. Unincorporated Calhoun County requires a building permit, and a zoning permit is required before a building, sign or structure is erected, moved, enlarged, altered or demolished^1,2. The county enforces South Carolina's adopted 2021 building codes and modifications, implemented locally in 2023⁷. For a home or manufactured home that will use septic, SCDES approval must come first; without the septic permit, the county cannot issue the building permit³. Calhoun County requires at least 24 hours' notice for residential inspections, performed Monday, Wednesday and Friday^1,8.

A property owner may use South Carolina's owner-builder exemption for a qualifying residence intended solely for the owner or family, but the owner must personally appear, sign the permit application, supervise construction and record the required notice⁴. The owner must use licensed or registered people where required and cannot hire an unlicensed builder or specialty contractor⁴. Selling or renting within 2 years after completion or the certificate of occupancy is evidence against eligibility unless the commission approves otherwise⁴.

The Calhoun County Building and Planning Office is the first stop for building permits, inspections, planning, zoning and code-enforcement questions¹. The office is at 102 Courthouse Drive, Administrative Annex Suite 112, Saint Matthews, SC; call (803) 874-4201 or email planning@calhouncounty.sc.gov¹. The county page also links an online permit portal¹.

A residential submission includes a complete application, scaled plans, energy-code and HVAC documents, a site plan, address verification, zoning approval, licensing and contractor information, plus proof of water and sewer availability or a septic permit; the Building Official may require more⁹. The checklist does not establish a universal requirement to connect to public utilities⁹. Calhoun County's published fee schedule charges $50 for a building permit on a project valued up to $10,000 and $50 plus $5 per thousand dollars of value for a project valued from $10,001 to $100,000; residential plan review adds 10% of the permit fee, and a re-inspection costs $50¹⁰. A manufactured-home permit costs $250 for a single-wide and $350 for a multi-wide¹⁰. Ask Building and Planning to confirm current fees before budgeting¹.

Yes. Calhoun County's zoning and development rules apply in unincorporated areas and do not apply inside incorporated municipalities². The county divides unincorporated land into zoning districts shown on its Official Zoning Map, and the Building and Planning Office handles zoning and plat review^1,11.

Lot size, setbacks, impervious coverage and building height vary by district, use and housing type². For example, the residential table lists a 10,000-square-foot minimum lot for detached homes and manufactured homes, while an approved conservation subdivision may reduce the RM minimum to 7,500 square feet². The RP district uses a 150-foot front setback, 50-foot side setbacks, a 25-foot rear setback and a 35-foot maximum building height, but those numbers do not apply countywide². Calhoun County's minimum dwelling floor area, accessory-dwelling rules and complete tiny-home occupancy rule could not be confirmed; ask Building and Planning for a written answer tied to the parcel, district and proposed design¹.

The South Carolina Department of Environmental Services, not Calhoun County, administers onsite wastewater permitting and inspection in Calhoun County³. For a new home or manufactured home on land without public or community sewer, apply through the SCDES ePermitting Portal and obtain site approval and a Permit to Construct before installation; the permit remains valid for 5 years, and renewal or an approved modification requires a new application and fee³. The residential application fee is $150³.

The installer must schedule an SCDES inspection before covering a new septic system¹². If the inspector does not arrive within 30 minutes of the scheduled time, a licensed installer may self-inspect with the approved final-inspection form¹². State law generally does not require regular inspections of existing systems, although local ordinances may add requirements¹². Only about 30.8% of Calhoun County soils are rated free of severe limitations for a conventional drain field, so make septic feasibility a purchase contingency¹³.

Calhoun County's complete rule for living long-term in an RV on private land could not be confirmed. A retreat center or vacation camp needs Board of Zoning Appeals approval before a zoning permit may be issued, but that rule does not by itself answer ordinary private-land RV occupancy². Ask Building and Planning what the parcel's district allows and what utility or time limits apply¹.

A complete tiny-home occupancy rule and minimum dwelling-floor-area rule also could not be confirmed. A tiny home still must clear county building and zoning review, and a site without public or community sewer needs SCDES septic approval first^1,2,3. Manufactured homes are expressly subject to county building and planning permits and inspections before occupancy².

1. Give the Calhoun County Building and Planning Office the parcel and proposed use; confirm its zoning district, dimensional standards and current fees^1,2.
2. If public or community sewer is unavailable, obtain SCDES site approval and the septic permit before seeking the county building permit³.
3. For a private residential well, submit the required Notice of Intent and $70 fee before construction⁶.
4. Resolve floodplain review before county permits; regulated sites may need sealed plans, and development is prohibited in the regulatory floodway¹⁴.
5. Apply for zoning and building approval with the required plans, site information, contractor documents, and water/sewer proof or septic permit^2,9.
6. If using the owner-builder exemption, appear personally, sign the application, supervise the work and record the required notice⁴.
7. Schedule county inspections with at least 24 hours' notice, and have a new septic installation inspected before covering it^8,12.

Make septic feasibility an early contingency: only about 30.8% of Calhoun County soils are rated free of severe limitations for a conventional drain field¹³. The county is about 63.2% wooded, and about 97.6% of its land has a slope of 15% or less, so parcel-level clearing, drainage and soil conditions matter more than county averages¹³.

Check zoning, flood risk, legal access and subdivision history before closing. Calhoun County prohibits development in the regulatory floodway; sites in a Special Flood Hazard Area can require sealed plans and state and federal permits before county permits¹⁴. Unincorporated major and minor subdivisions are regulated, and approved final plats and covenants must be recorded². Access rules tighten when a minor subdivision creates 6 to 8 lots, requiring a shared private drive through a recorded easement at least 40 feet wide². A driveway onto a state highway also goes through SCDOT¹⁵.