Unincorporated Calhoun County, South Carolina requires a building permit through the county Building and Planning Office12. Calhoun County also has an adopted Zoning and Development Code, while the South Carolina Department of Environmental Services handles septic approval34. For a home or manufactured home on land without public or community sewer, obtain the SCDES septic permit before the county can issue the building permit5.
At a glance
- Building permit
- Required through the Calhoun County Building and Planning Office1
- Zoning
- Yes; confirm the parcel's district and allowed use with Building and Planning3
- Septic
- SCDES approval is required where public or community sewer is unavailable6
- Owner-builder
- Available for a qualifying owner-occupied residence, with conditions7
- Farm structures
- A qualifying nonresidential farm structure requires an owner affidavit before construction8
- RV living
- Long-term private-land occupancy was not confirmed; ask Building and Planning before relying on it3
- Tiny homes
- A complete county occupancy rule was not confirmed; ask Building and Planning about the parcel and design3
- Residential well
- A Notice of Intent and a $70 fee are required before construction9
Who to call
Building permits
Calhoun County Building and Planning Office
Building permits, inspections, planning and zoning review, code enforcement, and floodplain permit forms
102 Courthouse Drive, Administrative Annex Suite 112, Saint Matthews, SC
Septic permits
South Carolina Department of Environmental Services — Onsite Wastewater Program
State site evaluation, permitting and final inspection for onsite wastewater systems; the Sandhills division serves Calhoun County
2600 Bull St., Columbia, SC 29201
Floodplain permits
Calhoun County Floodplain Administrator
Floodplain development permit applications and guidance
102 Courthouse Dr., St. Matthews, SC 29135
Contact details are copied from each office’s official page and were checked against it on September 29, 2026.
Do you need a building permit in Calhoun County, South Carolina?
Yes. Unincorporated Calhoun County requires a building permit, and the Building and Planning Office coordinates residential, commercial and industrial permitting12. For a home or manufactured home that will use septic, SCDES approval and the septic-installation permit must come first; without that permit, the county cannot issue the building permit5. The county enforces South Carolina's adopted building codes, with the current cited code set implemented in 202310. Calhoun County requires at least 24 hours' notice for residential inspections, performed Monday, Wednesday and Friday112.
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 and supervise construction7. The owner must use licensed or registered people where required and promptly record the required notice7. Selling or renting within 2 years after completion or the certificate of occupancy is evidence against eligibility unless the commission approves otherwise7.
Who handles Calhoun County building permits and inspections?
The Calhoun County Building and Planning Office is the first stop for building permits, inspections, planning, zoning and code-enforcement questions2. The office is at 102 Courthouse Drive, Administrative Annex Suite 112, Saint Matthews, SC; call (803) 874-4201 or email [email protected]2. The county page also links an online portal for submitting or checking the status of a permit application or code-enforcement complaint2.
Ask the office which drawings, trade permits and approvals your particular project needs before filing. South Carolina leaves permitting procedures and fees to the local jurisdiction, so the county office—not a statewide fee table—is the authoritative source for the current charge1213. The current Calhoun County building-permit fee amounts could not be confirmed; request the current fee list from Building and Planning before budgeting.
Does Calhoun County have zoning?
Yes. Calhoun County maintains an adopted Zoning and Development Code and a Planning Commission and Board of Zoning Appeals3. The same Building and Planning Office handles plan reviews, plat reviews, planning matters and zoning matters2. Before buying, give the office the parcel number and proposed use and ask for the zoning district, permitted uses, setbacks and any variance or rezoning path.
Calhoun County's complete rules for long-term RV occupancy, tiny-home occupancy, accessory dwellings and minimum dwelling floor area could not be confirmed. Those uses should not be treated as automatically allowed simply because the parcel looks rural; ask Building and Planning for a written parcel-specific answer32. A qualifying farm structure other than a residence or a structure attached to a residence may use the county's farm-structure process, but the owner must file an affidavit before construction, and floodplain, electrical, county-ordinance and SCDES requirements can still apply8.
How do septic permits work in Calhoun County?
The South Carolina Department of Environmental Services, not Calhoun County, administers onsite wastewater permitting and inspection in Calhoun County4. For a new home or manufactured home on land without public or community sewer, obtain SCDES 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 fee614. The site-evaluation/application fee is $15014.
The installer must schedule an SCDES inspection before covering a new septic system15. If the inspector does not arrive within 30 minutes of the scheduled time, a licensed installer may self-inspect with the approved final-inspection form15. State law generally does not require regular inspections of existing systems, although local ordinances may add requirements15. 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 contingency16.
Can you live in an RV or tiny home in Calhoun County?
Calhoun County's complete rule for living long-term in an RV on private land could not be confirmed. Ask the Building and Planning Office whether the parcel's zoning district permits RV occupancy, whether a principal dwelling must exist first, and what utility or time limits apply32. South Carolina's camping limit for state-park campsites does not answer the private-land question17.
A complete countywide tiny-home occupancy rule and minimum dwelling-floor-area rule also could not be confirmed. A tiny home still has to clear the county's building-permit and zoning reviews, and land without public or community sewer still needs SCDES septic approval before the county can issue a building permit135. For a manufactured home that will use septic, obtain SCDES site approval and the septic permit before installation6.
How do you build a home in Calhoun County, step by step?
- Give the Calhoun County Building and Planning Office your parcel number and plans; confirm zoning, setbacks, required documents and the current permit fee32.
- If public or community sewer is unavailable, apply to SCDES for site approval and the septic permit before seeking the county building permit5.
- For a private residential well, submit the required Notice of Intent and $70 fee before construction9.
- If the site is in or immediately beside a floodplain, contact the Floodplain Administrator; development in the regulatory floodway is prohibited1819.
- Submit the county building-permit application and proof of water and sewer availability or the septic permit202.
- If using the owner-builder exemption, appear personally, sign the application, supervise the work and promptly record the required notice7.
- Schedule county building inspections with at least 24 hours' notice, and have the new septic installation inspected before it is covered1115.
What should you check before buying land in Calhoun County?
Make septic feasibility an early contingency: only about 30.8% of Calhoun County soils are rated free of severe limitations for a conventional drain field16. 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 averages2122.
Check the flood map and access before closing. Calhoun County prohibits development in the regulatory floodway, and projects in or immediately adjacent to a floodplain can require sealed plans, elevation documentation and prior state or federal permits18. A qualifying personal-use residential driveway onto a state highway goes through SCDOT, subject to safety and eligibility conditions23. For carrying costs, Calhoun County's effective property-tax rate is about 0.4%, its median annual property-tax bill is about $630, and the typical annual home-insurance premium is about $1,653242526.
Watch-outs
- For a home or manufactured home on land without public or community sewer, SCDES septic approval must come before the county building permit5.
- Calhoun County requires at least 24 hours' notice for residential inspections, which are performed Monday, Wednesday and Friday11.
- A new septic installation must be inspected before the system is covered15.
- No development is allowed in Calhoun County's regulatory floodway18.
- Long-term RV living, tiny-home occupancy, accessory-dwelling rules and minimum dwelling size could not be confirmed; ask Building and Planning for a written parcel-specific answer32.
Sources
- Calhoun County Building and Planning (2026 county census)
- Calhoun County Building and Planning Office (calhouncounty.sc.gov)
- Calhoun County Planning Commission & Board of Zoning Appeals (2026 county census)
- Septic Tanks - Residential, Single Home Builder, quoted and re-checked
- Septic Tanks - Residential, Single Home Builder, quoted and re-checked
- Septic Tanks - Residential, Single Home Builder, quoted and re-checked
- Code of Laws - Title 40 - Chapter 59 - Residential Home Builders, quoted and re-checked
- Affidavit for Farm Structure, quoted and re-checked
- Private Drinking Water Wells, quoted and re-checked
- 2021 South Carolina Code Adoptions, quoted and re-checked
- Residential Plan and Inspection Guidelines, quoted and re-checked
- Building Codes Council Frequently Asked Questions (South Carolina statewide rule), quoted and re-checked
- Building Codes in Effect for South Carolina (South Carolina statewide rule), quoted and re-checked
- Septic Tanks - Residential, Single Home Builder, quoted and re-checked
- Site Inspections, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- South Carolina Code Title 51, Chapter 3, State Parks (South Carolina statewide rule), quoted and re-checked
- Floodplain Development Permit Application, quoted and re-checked
- Calhoun County Floodplain Administrator (calhouncounty.sc.gov)
- Residential Permit Submittal Requirements, quoted and re-checked
- Wooded share of land: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Engineering Directive ED-16: Driveway Entrances (South Carolina statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home insurance premium: Bolthole Index county data
Written September 29, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.