Unincorporated Lexington County, South Carolina requires building permits for covered construction, alterations, occupancy changes, and regulated trade work1. County zoning applies in unincorporated areas, while municipalities set zoning inside their limits2. SCDES—not the county or a municipality—issues septic permits for properties without public or community sewer; county or municipal building permits and zoning approval remain separate3.
At a glance
- Building permit
- Required to construct, enlarge, renovate, move, or change occupancy of a building or structure1
- Zoning
- County zoning applies in unincorporated areas; municipalities set zoning inside their limits2
- Septic permits
- SCDES issues septic approval and permits countywide; building permits and zoning approval are separate3
- Owner-builder
- Available for qualifying owner-occupied residential work, with personal supervision, licensed trades where required and recorded notice4
- Tiny homes
- Individual tiny homes are regulated by form, district and street classification; a typical lot needs at least 9,000 square feet5
- RV living
- A single residential RV follows Residential Detached standards; temporary housing with a primary residence has time limits67
- Short-term rentals
- A county zoning permit is required to operate in unincorporated areas8
- Manufactured homes
- Installation or replacement requires a permit; larger groupings are treated as mobile-home parks9
Who to call
Building permits
Lexington County Building/Safety Inspection Division (Community Development)
Building, electrical, gas, mechanical and plumbing permits, plan review and inspections for unincorporated Lexington County; offices are on the fourth floor of the county Administration Building
BuildingInspections@lexingtoncounty.sc.gov
212 South Lake Drive, Lexington, SC 29072
Zoning
Lexington County Zoning Division (Community Development)
New zoning applications, zoning map amendments and variances, zoning violation complaints, signs, short-term rentals and property-maintenance questions
CDCustomerService@lexingtoncounty.sc.gov
212 South Lake Drive, Lexington, SC 29072
Septic permits
South Carolina Department of Environmental Services (SCDES), Columbia Local Office
Septic system site evaluations, installation permits and final inspections for Lexington County
State Park Health Center, 8500 Farrow Road Bldg 12, Columbia, SC 29203
Floodplain permits
Lexington County Floodplain Management Program (Community Development / Land Development)
Floodplain determinations, Flood Insurance Rate Map review and floodplain-development compliance under the county's Flood Damage Prevention Ordinance
212 South Lake Drive, Lexington, SC 29072
Roads & driveways
Lexington County Public Works Department, Engineering Division
Encroachment permits for driveway and utility work in county road rights-of-way, plus maintenance of county roads and drainage
publicworks@lexingtoncounty.sc.gov
440 Ball Park Road, Lexington, SC 29072
Contact details are copied from each office’s official page and were checked against it on October 11, 2026.
Off-grid gear
Going off-grid in Lexington County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Lexington County, South Carolina?
Unincorporated Lexington County requires a building permit to construct, enlarge, renovate, move, or change the occupancy of a building or structure; regulated electrical, gas, mechanical, and plumbing work also requires the corresponding trade permits1. Ordinary repairs, maintenance, and listed exempt work are exceptions, but installing or replacing a manufactured home requires a building permit regardless of cost1. Lexington County applies the International Building Codes and state-adopted appendices in the version most recently adopted by SCLLR10.
Lexington County publishes building-permit and development-review fees; staff calculate building-permit fees from project valuation, subject to a $50 minimum11. A qualifying residential owner-builder may obtain a building permit for the owner's residence, but the home cannot be offered for sale or rent for two years and hired trades must be properly licensed when required4. A qualifying farm structure has a limited state building-code exemption, but the owner must file an affidavit before construction and local authority to require a building permit remains12.
Who issues building permits in Lexington County, and how do you reach them?
Lexington County's Building/Safety Inspection Division is the county building-permit contact at 212 South Lake Drive, Lexington, SC 29072; call (803) 785-8130 or email BuildingInspections@lexingtoncounty.sc.gov13. County applicants use the online building-permits portal to apply, request inspections, and upload documents14.
Town of Lexington, Cayce, and Town of Springdale handle their own building permits151617. Columbia, mainly in Richland County but extending into Lexington County, also handles its own building permits18. SCDES handles septic permits throughout Lexington County where public or community sewer is unavailable3. For county zoning applications, map amendments, and variances, contact the Zoning Division at (803) 785-8121 or CDCustomerService@lexingtoncounty.sc.gov1920.
Does Lexington County have zoning?
Lexington County zoning applies only in unincorporated areas21. Town of Lexington, Cayce, Town of Springdale, Town of South Congaree, and Town of Chapin administer their own zoning2223242526. Columbia, mainly in Richland County but extending into Lexington County, has its own zoning; SCDES remains the septic-permit authority countywide273.
County zoning maps show both district and street classification28. Residential accessory buildings need at least 5 feet from adjoining property lines, subject to buffering and other applicable setbacks29. Qualifying residential uses adjoining an agricultural operation in the Agricultural District overlay require a 50-foot property-line setback30.
Residential Detached (Limited) developments prohibit secondary dwellings; each dwelling lot must be 4,000–5,000 square feet and at least 50 feet wide, dwelling coverage is capped at 50%, and height at 2 stories or 30 feet31323334. These are development-specific standards; waterfront and airport overlays impose separate height controls3235.
How do septic permits work in Lexington County?
SCDES issues septic permits and inspects onsite systems throughout Lexington County, including inside municipalities; county or municipal building permits and zoning approval are separate363. For a home or manufactured home without public or community sewer, obtain SCDES approval and a Permit to Construct before seeking the building permit37. The application uses the D-1740 form and requires a plat or deed, a $150 fee, and submission through the state ePermitting portal38. The SCDES Columbia local office covers Lexington County; call (803) 896-062039.
SCDES inspects the installation and issues approval to operate when the system meets state standards40. Before covering a new installation, the installer must schedule the septic inspection; if the inspector has not arrived within 30 minutes of the appointment, a licensed installer may self-inspect and submit the approved final-inspection form41. Only 18.2% of county soils are rated without severe limitations for a conventional drain field, so make the site evaluation an early purchase contingency42.
Can you live in an RV or tiny home on your land in Lexington County?
A single RV used as a residence in unincorporated Lexington County follows Residential Detached standards, including density and setbacks, and must meet registration or licensing and vehicle parking/storage requirements6. Temporary RV housing is a separate accessory use with a primary residence, subject to buffering and other zoning conditions and an aggregate limit of 1 year7. During primary-home construction or after loss of an existing home, temporary occupancy follows the associated building permit and ends no later than 30 days after final inspection or permit expiration, whichever occurs first; that circumstance is exempt from density requirements43. Multiple habitation vehicles or rental use is classified as Transient Habitation and faces additional zoning rules44.
Unincorporated Lexington County regulates a tiny home by form, zoning district, and street classification; a Residential Detached, Mobile Home, or Tiny Home lot generally needs at least 9,000 square feet, with a conditional exception for pre-existing nonconforming lots5. Mobile-home and tiny-home parks require Board of Zoning Appeals special-exception approval, a detailed site plan, and a zoning permit45. We could not confirm a minimum habitable floor area; ask the Zoning Division to classify the unit and parcel20.
Building a home in Lexington County: the steps, in order
- Identify whether the parcel is unincorporated or inside a municipality, then get the zoning district, street classification, overlays, use approval, setbacks, and lot standards from the responsible zoning office2146.
- Verify sewer availability; SCDES cannot issue an onsite-wastewater permit where public sewer is accessible47.
- If sewer is unavailable, submit the SCDES septic-permit application, plat or deed, and fee before seeking a building permit38.
- For an individual residential well, submit the state Notice of Intent and $70 fee before construction48.
- Apply for the building permit through Lexington County's portal when the county is the building authority; inside a municipality, use its building-permit process4921.
- Contact Floodplain Management about mapped flood risk and Public Works about a driveway permit for work in a county road right-of-way5051.
- Request building inspections from the issuing building office, and schedule the SCDES septic installation inspection before covering the system4940.
What to check before you buy land in Lexington County
Before dividing land in Lexington County, confirm subdivision review: each new parcel needs publicly maintained or approved private-road access, adequate storm drainage, water, and sewer; private-road access requires Planning Commission approval52. Subdivision plats and land-development plans in unincorporated areas require county approval before recording53. Check mapped flood risk with Floodplain Management and county-road encroachment questions with Public Works5051.
Installing or replacing a manufactured home requires a building permit regardless of cost1. County zoning allows 2 mobile homes on a parcel, adjoining parcels, or parcels in the vicinity, or 3 if the owner lives in one; larger groupings are mobile-home parks requiring special-exception approval54. Active agricultural operations in the Agricultural District overlay have specified noise and Neighborhood Appearance District exemptions, rather than a blanket exemption from county requirements55.
An unincorporated short-term rental requires a zoning permit and annual renewal, with occupancy limited to septic capacity856. Lexington County's effective property-tax rate is about 0.5%, with a median annual bill of about $1,1365758.
Watch-outs
- Residential Detached (Limited) developments in Lexington County prohibit secondary dwelling units regardless of density31.
- A new septic system must be inspected before it is covered, although a licensed installer may self-inspect if the SCDES inspector misses the scheduled appointment by 30 minutes41.
- A tiny home's small size does not itself authorize occupancy; its form, zoning district, street classification, lot area, building requirements, and septic approval still control5.
Sources
- Building Permits FAQs, quoted and re-checked
- Zoning FAQs, quoted and re-checked
- Septic Tanks - Residential, Single Home Builder, quoted and re-checked
- Building Permits FAQs, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- New Short Term Rental Permitting Requirements, quoted and re-checked
- Building Permits FAQs, quoted and re-checked
- Building Code Ordinance, quoted and re-checked
- Development Review and Permit Fees, quoted and re-checked
- South Carolina Code of Laws, Section 6-9-65 (South Carolina statewide rule), quoted and re-checked
- Lexington County Building/Safety Inspection Division (Community Development) (lex-co.sc.gov)
- Building Permits, quoted and re-checked
- Town of Lexington: official source (Lexington County), quoted and re-checked
- Cayce: Building Services (Lexington County), quoted and re-checked
- Town of Springdale: Sec. 5-21. - Building permit—Required (Lexington County), quoted and re-checked
- Columbia: Planning & Development Services Annual Report, Fiscal Year 2023-2024 (Lexington County), quoted and re-checked
- Zoning Ordinance Information, quoted and re-checked
- Lexington County Zoning Division (Community Development) (lex-co.sc.gov)
- Zoning FAQs, quoted and re-checked
- Town of Lexington: Planning & Building (Lexington County), quoted and re-checked
- Cayce: Planning and Zoning (Lexington County), quoted and re-checked
- Town of Springdale: Appendix B, Sec. 9-3. - Permits (Lexington County), quoted and re-checked
- Town of South Congaree: Zoning | South Congaree, SC (Lexington County), quoted and re-checked
- Town of Chapin: Planning & Zoning (Lexington County), quoted and re-checked
- Columbia: Code of Ordinances - Planning & Development - City of Columbia (Lexington County), quoted and re-checked
- Zoning FAQs, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- lex-co.sc.gov, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- Site Inspections, quoted and re-checked
- Septic Tanks - Residential, Single Home Builder, quoted and re-checked
- Septic Tanks - Residential, Single Home Builder, quoted and re-checked
- South Carolina Department of Environmental Services (SCDES), Columbia Local Office (des.sc.gov)
- Site Inspections, quoted and re-checked
- Septic Tanks - Residential, Single Home Builder, quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- Revised Zoning Ordinance Draft - Ordinance 23-17, quoted and re-checked
- Lexington County Zoning Ordinance — June 23, 2026, quoted and re-checked
- Zoning FAQs | County of Lexington, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- Professional Soil Classifiers - Sewer Accessibility Verification (South Carolina statewide rule), quoted and re-checked
- Private Drinking Water Wells (South Carolina statewide rule), quoted and re-checked
- Building Permits, quoted and re-checked
- Lexington County Floodplain Management Program (Community Development / Land Development) (lex-co.sc.gov)
- Lexington County Public Works Department, Engineering Division (lex-co.sc.gov)
- Subdivision FAQs, quoted and re-checked
- Subdivision Regulations and Plat Review, quoted and re-checked
- Zoning FAQs, quoted and re-checked
- Lexington County Zoning Ordinance, quoted and re-checked
- New Short Term Rental Permitting Requirements, quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written October 11, 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.