Building permits, zoning and septic rules across South Carolina

At a glance

Residential building permits

0 broadly exempt; 2 limited; 44 required³²¹

County-wide zoning

5 counties without county-wide zoning; 40 with zoning⁴⁹

No building permit and no zoning

0 counties¹⁰

Septic permits

SCDES approval before building on land without sewer¹¹

RV living

23 counties have answers; permission has conditions⁷

Tiny homes

13 counties have answers; siting and construction conditions matter⁸

Owner-builder

Conditional licensing exemption for personal or family occupancy¹²

Residential wells

General Permit Notice of Intent; $70 fee¹³

Who to call

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Which South Carolina counties don’t require a building permit?

No South Carolina county is listed as broadly exempt from residential building permits: 44 require them and 2 require them only in some cases.³¹² Barnwell County and Colleton County are the limited-requirement counties; that classification does not mean every home avoids a building permit.²

South Carolina's 2021 building codes remain the current framework, with the adopted 2024 codes scheduled for implementation January 1, 2027.¹⁴¹⁵ Building-permit fees and administrative procedures belong to the local jurisdiction, so ask the applicable building official for the application requirements and fee schedule.¹⁶¹⁷ The owner-builder options require personal supervision, personal or family occupancy, compliance with codes and zoning, and a public notice filed with the register of deeds.¹²

Which South Carolina counties have no zoning?

South Carolina has 5 counties without county-wide zoning: Williamsburg County, Allendale County, Saluda County, Laurens County and Cherokee County.⁴ The South Carolina no-zoning county list is a starting point for that search, while 40 counties have county zoning.⁴⁹

Absence of county-wide zoning does not establish absence of building permits: no county is listed with neither a residential building-permit requirement nor county-wide zoning.¹⁰ South Carolina authorizes counties to zone all or specific parts of their unincorporated territory, with regulations differing by district.¹⁸ Ask the county planning office which district and land-development rules cover the actual parcel; locally adopted subdivision regulations can require plan approval before recording or building-permit issuance.¹⁹

Who issues septic permits in South Carolina?

South Carolina Department of Environmental Services is the septic authority across all 46 counties.²⁰ For a home or manufactured home on land without public or community sewer, obtain SCDES approval and a septic installation permit first; the county cannot issue the building permit without that septic permit.¹¹ Accessible public sewer prevents issuance of an onsite wastewater permit, so establish sewer accessibility before applying.²¹

South Carolina septic Permits to Construct are valid for 5 years; renewal or approved changes require a new application and fee.¹¹ A site evaluation is required for a new home using septic, and the installer must arrange the final inspection before covering the system.²² Contact SCDES Onsite Wastewater Customer Support for application questions before submission or copies of existing septic permits.²³ Off-grid sanitation is also regulated: alternative toilet-waste systems require departmental construction and operating approvals, and graywater treatment needs its own onsite wastewater approval.²⁴²⁵

Can you live in an RV or tiny home on your land in South Carolina?

South Carolina RV answers cover 23 counties: 4 classified as allowed, 3 temporary-only, 13 limited and 3 prohibited; another 23 have no confirmed county-level answer.⁷ The allowed entries include Saluda County, Laurens County, York County and Cherokee County, but York's entry concerns a temporary emergency dwelling after damage makes the permanent home uninhabitable.⁷ Read the RV living county options for the conditions before choosing land.⁷

Tiny-home answers cover 13 counties: 7 allowed, 5 limited and 1 prohibited; 33 remain unanswered.⁸ Allowed entries are McCormick County, Abbeville County, Florence County, Saluda County, Laurens County, Cherokee County and Greenville County; the entries concern particular forms of housing or land-use conditions, including fixed tiny houses in Greenville pocket neighborhoods.⁸ Use the tiny-home county options to distinguish those conditions, and obtain SCDES approval for onsite wastewater.⁸⁶

Where are the best South Carolina counties for a bolthole?

Barnwell County leads the Bolthole Index's South Carolina off-grid and homestead land scores at 70 out of 100, followed by Williamsburg County at 69 and McCormick County at 68.²⁶ Barnwell has limited residential building-permit requirements and zoning; Williamsburg requires residential building permits but has no county-wide zoning; McCormick requires residential building permits and has zoning.²⁶ Abbeville County and Colleton County follow at 66, then Fairfield County, Georgetown County and Greenwood County at 65.²⁶ All these counties use the state septic authority.²⁶

The median county farmland value is $3,802 per acre; Lee County has the lowest listed value at $2,655 per acre.²⁷ Those are farmland benchmarks, not asking prices for individual building lots.²⁷ The median county effective property-tax rate is 0.5%, and the median county property-tax bill is $852 annually.²⁸

What approvals do South Carolina water wells need?

Before constructing an individual residential or irrigation well in South Carolina, the owner, agent or driller must submit a Notice of Intent for General Permit coverage.¹³ The residential-well fee is $70; the irrigation-well fee is $50.¹³ The well driller must notify SCDES 48 hours before installation with the exact date, time and location.¹³ Contact the SCDES Private Drinking Water Wells Program about residential well construction approvals.²⁹

South Carolina has 28 counties inside a special groundwater management regime, but construction approval and groundwater withdrawal approval are separate questions.³⁰¹³ A well or system withdrawing more than 3 million gallons in a month also needs a Groundwater Withdrawal Permit.¹³ Wells supplying multiple households or a small business follow public-water-supply permitting procedures.¹³

Watch-outs

• County counts concern unincorporated land; municipalities have their own building-official jurisdictions, so identify the applicable local office before applying.⁵
• South Carolina's adopted 2024 building codes are scheduled to take effect January 1, 2027; ask the local building official which edition will govern your application.¹⁵
• A South Carolina farm-structure code exemption excludes residences and attached structures, requires an affidavit before construction, preserves local building-permit authority and retains applicable flood standards.³¹
• A driveway or entrance onto a South Carolina primary highway requires Department of Transportation approval before opening, construction or reconstruction.³²

Sources

1. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: South Carolina counties that require a residential building permit in unincorporated areas
2. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: South Carolina counties that require a residential building permit only in some cases (for example floodplain or certain structures)
3. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: South Carolina counties that do not require a residential building permit in unincorporated areas
4. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: South Carolina counties with no county-wide zoning
5. South Carolina: South Carolina Code Title 6, Chapter 9 — Building Codes, quoted and re-checked
6. South Carolina: Septic Tanks - Residential, Single Home Builder, quoted and re-checked
7. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: South Carolina counties' answers on living in an RV on your own land
8. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: South Carolina counties' answers on living in a tiny home on your own land
9. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: South Carolina counties with county zoning
10. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: South Carolina counties with neither a residential building permit nor county-wide zoning
11. South Carolina: Septic Tanks - Residential, Single Home Builder, quoted and re-checked
12. South Carolina: South Carolina Code Title 40, Chapter 59 — Residential Home Builders, quoted and re-checked
13. South Carolina: Private Drinking Water Wells, quoted and re-checked
14. South Carolina: Building Code Adoption, quoted and re-checked
15. South Carolina: 2024 Building Code Modification Index, quoted and re-checked
16. South Carolina: Building Codes Council Frequently Asked Questions, quoted and re-checked
17. South Carolina: Building Codes in Effect for South Carolina, quoted and re-checked
18. South Carolina: South Carolina Code Title 6, Chapter 29 — Local Government Comprehensive Planning Enabling Act, quoted and re-checked
19. South Carolina: South Carolina Local Land Development Regulation Provisions, quoted and re-checked
20. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: Who issues septic permits across South Carolina's counties: a state agency, a multi-county health district, or the county
21. South Carolina: Professional Soil Classifiers - Sewer Accessibility Verification, quoted and re-checked
22. South Carolina: Septic Tanks - Frequently Asked Questions, quoted and re-checked
23. SCDES Onsite Wastewater Customer Support (des.sc.gov)
24. South Carolina: South Carolina State Register Vol. 45, Issue 5 — Regulation 61-56, quoted and re-checked
25. South Carolina: South Carolina State Register Vol. 45, Issue 5 — Regulation 61-56, quoted and re-checked
26. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: The 8 highest-scoring South Carolina counties on the Bolthole Index (off-grid and homestead land score out of 100), with each one's building-permit, zoning and septic answers
27. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: Median farmland value per acre across South Carolina's counties (USDA census, the middle county's value; USD/acre), with the five least expensive counties
28. Bolthole Index county rulebook, 46 South Carolina counties, as of October 10, 2026: Median of South Carolina's county effective property tax rates and median county property tax bills
29. SCDES Private Drinking Water Wells Program (des.sc.gov)
30. South Carolina water rights and groundwater management: National Agricultural Law Center and Bolthole Index groundwater review
31. South Carolina: South Carolina Code of Laws, Section 6-9-65, quoted and re-checked
32. South Carolina: scstatehouse.gov, quoted and re-checked

Written October 10, 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.