A steep wooded Blue Ridge slope with a boulder creek and small waterfall, rhododendron thickets, a granite outcrop, and hazy ridgelines above a lake far below.
Oconee County One statewide code, county design maps

Barndominium Builders in Oconee County, SC

Oconee County has a zoning ordinance that covers the whole unincorporated county and, on most of the land in it, regulates nothing about how you use your acreage. The Zoning Enabling Ordinance applies countywide by its own jurisdiction clause, then drops every parcel into a Control Free District where, in the ordinance's words, use "shall not be regulated by this Chapter" — and land only leaves that district when the people who own it petition to rezone. So the usual question is the wrong one here. S.C. Code Section 6-29-330(A) lets a county zone "the total unincorporated area or specific parts of the unincorporated area", and Oconee has effectively done the second by handing the map to its citizens. Ask whether your parcel is zoned, not whether the county is. Then read the things that bind regardless: the flood chapter, the lake overlay, the septic regulation and the state building code.

Oconee County at a glance

County
Oconee County
Population
83,775

Building conditions in Oconee County

The building code is the same in every South Carolina county: S.C. Code § 6-9-10(A) requires each municipality and county to enforce the Building Codes Council's codes and to enforce only those, and SC Regulation 8-236(C) bars a local jurisdiction from writing one of its own. The design numbers are not local either, but they are not one number for the state — Regulations 8-1202 and 8-1203 send wind and seismic to the Council's own map for this county, and those maps are drawn as contours, so the figure is read at your address rather than off a county name. What is genuinely local is who issues the permit and inspects the work, what that office charges, the permit procedure it adopted by ordinance, whether your parcel is zoned at all, and the rest of Table R301.2 — frost depth, termite probability and flood — which the jurisdiction fills in for itself.

Build conditions for Oconee County , South Carolina . BUILD CONDITIONS OCONEE COUNTY, SCOconee CountyONE STATEWIDE CODEADOPTED RESIDENTIAL CODEONE STATEWIDE CODENo design wind speed is carried on this page. It is read off the Building Codes Council mapcovering the county and settled in writing with the authority over your parcel before the frame i…ZONING · CFD (CONTROL FREE DISTRICT)The Zoning Enabling Ordinance applies throughout the unincorporatedcounty (Sec. 38-1.3), but Sec. 38-10.2 makes Control Free the…WHO ISSUES THE PERMITOconee County Building Codes Division415 South Pine Street, Walhalla SC 29691, (864) 718-1005; permitsand plan-review uploads through CitizenServe. Planning & Zoning, at…
Build conditions for Oconee County, drawn from the sourced facts on this page. Every figure above is cited in the quick-facts panel below, with its source and vintage.
Every parcel starts in a district the ordinance does not regulate
Section 38-10.2 of the Zoning Enabling Ordinance: "The usage of parcels within areas designated as 'control free' shall not be regulated by this Chapter; however, said usage shall comply with all adopted performance standards, overlay districts, or any other applicable ordinance of Oconee County or chapter of the Oconee County Code of Ordinances. The Control Free District is intended to be the initial zoning district for all parcels within the jurisdiction at the time of initial adoption of zoning in Oconee County." The county's own zoning-districts page states it plainly: all parcels in Oconee County are zoned Control Free until rezoned. The county's published matrix of base zoning districts carries no Control Free column at all — there are no permitted, conditional or special-exception uses to list for it.

Oconee County Zoning Enabling Ordinance, Sec. 38-10.2, as published by the county Planning Department at https://oconeesc.com/documents/planning-zoning/zoning-info/base-zoning-districts.pdf ; county statement at https://oconeesc.com/planning-and-zoning-home/zoning-info/zoning-districts (both loaded 5 Sep 2026)

In Control Free the ordinance's setbacks, lot sizes and height caps do not apply either
Section 38-9.3 of the same ordinance sets out the general dimensional requirements — lot size and configuration, front, side and rear yards, garage-door setback, the buildable-area rule — and then closes the point in one line: "The control free district shall be exempt from the provisions of this section." Section 38-9.4's height provisions run with the district tables, and CFD has none. So on Control Free land the zoning ordinance imposes no minimum lot size, no yard setbacks and no height limit, and nothing in it caps an accessory building's size or height against the dwelling's. A shop half larger and taller than the living half is not a zoning question in Oconee. It is a foundation, span and engineering question.

Oconee County Zoning Enabling Ordinance 2007-18 (adopted 6 Nov 2008, implemented 1 May 2009; text amendments 19 May 2009 and 17 Aug 2010), Secs. 38-9.3 and 38-9.4, https://oconeesc.com/documents/planning-zoning/zoning-info/zoning-enabling-orinance-amended.pdf (loaded 5 Sep 2026)

Your neighbours can put your land under zoning without your signature
Rezoning out of Control Free is petition-driven, and the petition threshold is a majority, not unanimity. Under the Small Area Method a group of owners holding at least 200 combined acres may petition County Council, signed by at least 51 percent of the owners of the properties in question and representing at least 75 percent of the acreage inside the proposed boundary; a platted subdivision route needs 25 contiguous acres or 20 parcels. The county's own FAQ spells out the consequence: the rules "only require the support of 51% of the property owners in any given area to initiate a rezoning request under the Small Area Method, which means that it is conceivable that up to 49% of the property owners did not sign a petition in support of initiating a request." A parcel that is Control Free the day you buy it may not be Control Free in five years.

Oconee County Planning Department, "Method 2 - Small Area Rezoning", https://oconeesc.com/documents/planning-zoning/zoning-info/small-area-method.pdf , "Method 1 - Planning District Initiated by Citizens", https://oconeesc.com/documents/planning-zoning/zoning-info/planning-district-method.pdf , and Planning & Zoning Common Questions, https://oconeesc.com/planning-and-zoning-home/common-questions (all loaded 5 Sep 2026)

The Building Codes Council publishes no wind or seismic map for this county
South Carolina replaced the residential code's wind and seismic sources with the Building Codes Council's own county maps: Regulation 8-1202 sends Section R301.2.1 to "the previously published maps by the South Carolina Building Codes Council" and Regulation 8-1203 does the same for the seismic design category. The Council's map page lists 35 of South Carolina's 46 counties. Oconee is one of the eleven with no approved map, alongside Anderson, Cherokee, Greenville, Greenwood, Laurens, McCormick, Pickens, Spartanburg, Sumter and Union. The page's own instruction for those counties is to consult a hazard tool "to determine the wind and seismic zones if a map has not been approved for that particular county." No wind speed or seismic design category is published by any South Carolina authority for Oconee County, and none should be quoted as though one were.

SC Building Codes Council, "Wind/Seismic Maps", https://llr.sc.gov/bcc/maps.aspx — served HTML enumerated 5 Sep 2026, 35 counties listed, Oconee absent; mechanism at SC Regs 8-1202 and 8-1203, 2021 Code Modifications, SC State Register Vol. 46 Issue 5 (27 May 2022)

And the fallback the code text names stopped operating at the end of 2024
The gap has a second half worth knowing before an engineer bills for it. The adopted 2021 modification tells the local building official the ATC hazard site may be consulted where no Council map exists, and the pending 2024 modifications point wind and seismic at the ASCE Hazard Tool from 1 January 2027. In between, the Council's own staff comment on the 2024 residential seismic item records: "The Committee should consider that the ATC Hazards by Location site ceased operation on December 31, 2024. Users are being encouraged to use the ASCE Hazard Tool in its place." So in Oconee County today there is no state-published map, and the site the in-force code text points to no longer exists. Settle the design criteria in writing with the county building official before anyone orders a frame.

SC Building Codes Council, "2024 Combined Continued Modifications with Index", staff comment on the 2024 IRC R301.2.2.1 item, https://llr.sc.gov/bcc/Forms/2024%20Combined%20Continued%20Modifications%20with%20Index.pdf (PDF downloaded and read as extracted text, 5 Sep 2026)

The county publishes the farm-structure affidavit and its own warning on top of it
Oconee County Building Codes hands out an Affidavit for Farm Structure reprinting S.C. Code Section 6-9-65 in full, including the definition that decides the question: a farm structure is "a structure which is constructed on a farm other than a residence or a structure attached to it." A barndominium is a residence, so it is outside the exemption in every case, and so is a shop attached to it. The county then adds its own position in writing: "a STRUCTURE built under this exemption and converted for any reason to another use (residential, mercantile, business, assembly, intuitional, industrial, factory, storage-nonfarm) would be in violation of State law and the Oconee Building Code and must be first brought up the resent minimum requirement of the current technical building codes." Building a shell as a barn and finishing it into a dwelling later is the plan this form exists to stop.

Oconee County Building Codes, "Affidavit for Farm Structure", 415 South Pine Street, Walhalla, https://oconeesc.com/forms/building-codes/farm-structure-affidavit.pdf (loaded 5 Sep 2026); statute at S.C. Code § 6-9-65

Also worth knowing before you build in Oconee County

Three feet of freeboard in the flood zone, and no basements
Chapter 16 of the county code is one of the things Control Free land still has to obey. Section 16-122(1) requires new residential construction and substantial improvements in zones A, AE, AH, AO and A1-30 to have "the lowest floor elevated no lower than three feet above the base flood elevation", and adds, flatly, "No basements are permitted." Non-residential construction gets the same three feet. In an AO shallow-flooding area with no depth number on the flood map, the floor goes at least three feet above the highest adjacent grade. Three feet of freeboard is well beyond the national minimum, and on a wide slab-on-grade building it is a fill, retaining and driveway-grade problem long before it is a paperwork problem.

Oconee County Code of Ordinances Ch. 16 (Floods), Secs. 16-122 and 16-123, as amended in its entirety by Ord. No. 2016-25, https://oconeesc.com/documents/planning-zoning/floodplain-management/floodplain-ordinance.pdf (loaded 5 Sep 2026)

Lake Keowee and Lake Jocassee carry an overlay that Control Free does not switch off
Section 38-11.1 applies within 750 feet of the full pond contour of Lakes Keowee and Jocassee, measured perpendicular to that contour, and overlays apply to CFD parcels by the express terms of Section 38-10.2. Inside it: residential net density no greater than 2 dwelling units per acre, no structure taller than 65 feet above finished grade, grade not to be altered "beyond that necessary to provide for structural soundness", and every non-residential project subject to a Board of Zoning Appeals special exception. Waterfront parcels whose property line falls within 25 feet of full pond must establish a 25-foot natural vegetative buffer, recorded on a plat as a dedication running with the land, triggered at sale or transfer and again at the first building-codes inspection of a new structure. The county's fact sheet gives full pond as 800 feet above mean sea level on Keowee and 1,110 feet on Jocassee, caps a view lane at 15 percent of the buffer area, and bars removal of trees over six-inch caliper measured four feet up. Lake Hartwell frontage is not in the overlay.

Oconee County Zoning Enabling Ordinance Sec. 38-11.1 as published at https://oconeesc.com/documents/planning-zoning/overlay-districts/section-38-11.0-of-article-xi.pdf and "Vegetative Buffer Requirements: An Overview" (Planning Department, updated July 2017), https://oconeesc.com/documents/planning-zoning/vegetative-buffer/vegetative-buffer-fact-sheet.pdf (both loaded 5 Sep 2026)

A post-frame or steel barndominium triggers plan review whatever its size
The Building Codes Division states that a building plan review is required before a permit issues for all commercial construction, "all single family-construction over 5000 square feet in size; and all projects utilizing alternate construction methods or engineering." A post-frame or rigid-steel-frame dwelling is exactly the second category, and a barndominium with a shop bay is frequently the first as well. That dovetails with the state modification that South Carolina wrote into the residential code's definitions: design that departs from the prescriptive method must be made to accepted design standards by a South Carolina licensed architect or engineer. Budget the stamped drawings at the outset rather than discovering them at the counter.

Oconee County Building Codes, "About Permits & Inspections", https://oconeesc.com/building-codes-home/about-permits-and-inspections (loaded 5 Sep 2026); SC Reg. 8-1201 modifying IRC R202, 2021 Code Modifications

Zoning still has to sign off before any county permit issues
Control Free is not a bypass around the counter. Section 38-2.4(3) of the zoning ordinance provides that "No permit shall be issued by any department or agency of Oconee County prior to certification of zoning compliance by the Zoning Official." The Building Codes Division's own residential checklist repeats the practical version at the first inspection: "All set-backs to be approved by the Zoning and Planning Department. (If footings are poured and set-backs not met, you may be subject to concrete removal.)" On Control Free acreage that check confirms overlays, flood status and any recorded restriction rather than a district setback, but it is still a check, and it happens before the footing pour, not after.

Oconee County Zoning Enabling Ordinance Sec. 38-2.4, https://oconeesc.com/documents/planning-zoning/zoning-info/zoning-enabling-orinance-amended.pdf ; Oconee County Residential Building Codes Checklist, Footing Inspection item 4, https://oconeesc.com/documents/building-codes/residential-codes-checklist.pdf (both loaded 5 Sep 2026)

No county slope threshold is published — the numbers come from the code and the septic rule
Oconee is the steepest county in South Carolina and it is fair to expect a hillside ordinance. There is not one. The Zoning Enabling Ordinance contains no slope provision at all, and the county's Land Development and Subdivision Regulations at Chapter 32, Article VI regulate road grade and drainage rather than setting a slope above which a house needs extra review. What does bite on a mountain parcel comes from elsewhere. The county's own residential checklist tells builders to "be aware of the slope limitations in footings per section R403.1.5" — the residential code's own limit on how steeply the top surface of a footing may slope, and the rule that forces stepped footings across a grade change. And the state septic regulation keeps the infiltration area 15 feet back from the top of the slope of any embankment or cut of two feet or more of vertical height where the trench sits higher than the invert. Design to those, not to a county number that does not exist.

Zoning Enabling Ordinance searched in full, https://oconeesc.com/documents/planning-zoning/zoning-info/zoning-enabling-orinance-amended.pdf ; Oconee County Code Ch. 32 Art. VI, Land Development and Subdivision Regulations, https://oconeesc.com/documents/council/committees/planning-commission/2025/backup-material/2025-08-18-special-backup.pdf ; Residential Building Codes Checklist, https://oconeesc.com/documents/building-codes/residential-codes-checklist.pdf ; S.C. Code Regs. 61-56.200.6(1)(j), https://www.law.cornell.edu/regulations/south-carolina/S-C-Code-SS-61-56.200 (all loaded 5 Sep 2026)

Above the Fall Line the soil evaluation is dug, not drilled
Septic is a state permit, not a county one — the Building Codes Division says so itself, listing septic design and approval under what it does not do. It runs through the South Carolina Department of Environmental Services under Regulation 61-56, and two provisions matter more here than on the coast. Section 61-56.104 requires backhoe pits, rather than borings alone, above the Fall Line that separates the Piedmont from the Coastal Plain — which is all of Oconee. And suitability is judged on soil morphology, not a percolation test: Section 61-56.200.1 asks for "soil texture, depth of soil to restrictive horizons, and depth to the zone of saturation", determined by accepted soil-science methods. The setback table adds 75 feet from the mean high water of any impounded body of water, which on Keowee, Jocassee and Hartwell is measured from full pond, and 5 feet from a building and a property line.

S.C. Code Regs. 61-56.104 (backhoe pits above the Fall Line), https://www.law.cornell.edu/regulations/south-carolina/R-61-56.104 , and 61-56.200.1 and 200.6(1), https://www.law.cornell.edu/regulations/south-carolina/S-C-Code-SS-61-56.200 ; scope statement at Oconee County Building Codes, https://oconeesc.com/building-codes-home (all loaded 5 Sep 2026)

778 farms, an average of 79 acres, and people still arriving
The 2022 Census of Agriculture counts 778 farms in Oconee County working 61,599 acres — 15.4 percent of the county's 401,020 land acres, and an average holding of 79 acres, one of the smallest county averages in South Carolina. Inside that acreage sit 20,734 acres of woodland, 19,970 of pasture and 17,182 of cropland. Population reached an estimated 83,775 in mid-2025 against 78,607 at the 2020 census, a 6.6 percent rise driven by migration rather than births: net domestic migration of +1,421 and international of +242 against a natural change of −446. Small tracts, lake frontage and retirement in-migration are the market here, and the practical constraint on most of them is grade and access rather than permission.

USDA NASS, 2022 Census of Agriculture County Profile, Oconee County, South Carolina (cp45073), https://www.nass.usda.gov/Publications/AgCensus/2022/Online_Resources/County_Profiles/South_Carolina/cp45073.pdf ; Census Bureau Vintage 2025 county estimates and components of change, and 2025 Gazetteer land area (loaded 5 Sep 2026)

The county enforces the state code, and it is the state's code everywhere
Ordinance 2022-26 amended Article II of Chapter 6 of the county code to adopt the 2021 International Building, Residential, Fire, Plumbing, Mechanical and Fuel Gas Codes with South Carolina modifications, the 2020 National Electrical Code and the 2009 International Energy Conservation Code, effective 1 January 2023 — the same set, on the same date, as every other county in the state, because S.C. Code Section 6-9-10(A) requires each county to enforce those codes and to enforce only those. The Building Codes Division describes its job as administering the permitting and inspection programme "as required of the County by state law", from 415 South Pine Street in Walhalla, with permits through CitizenServe and a Building Board of Appeals. There is no local amendment to the residential code here; in the whole state exactly one has been granted under the 2021 codes, and it belongs to Greenville County.

Oconee County Ordinance 2022-26, https://oconeesc.com/documents/building-codes/adopted-codes.pdf ; Oconee County Building Codes department page, https://oconeesc.com/building-codes-home ; S.C. Code § 6-9-10(A), https://www.scstatehouse.gov/code/t06c009.php (all loaded 5 Sep 2026)

An excavator grading a compacted building pad on a cleared lot, with orange clay in the cut face, survey stakes and a drainage swale.
Below the slab

The expensive surprises are in the ground, not the building

What moves a South Carolina budget is usually below grade, and more often than not it is the drainfield rather than the foundation. R.61-56 § 200.1 settles whether a parcel can take an onsite system from soil morphology — texture, structure, depth to a restrictive horizon and depth to the zone of saturation — and § 200.2 then rules out two conditions outright: soils exhibiting massive or platy structure, and soils with substantial amounts of expansible layer clay minerals or smectites. That second clause is the one that bites on the mafic Piedmont, where the shrink-swell series sit in quantity under York, Fairfield, Chester, Laurens, Union, Newberry, Greenwood, McCormick, Lancaster, Saluda, Abbeville and Edgefield. A foundation problem has a price and an answer; an unbuildable septic parcel has neither, which is why we look at it first. Bedroom count is the number to settle early, because § 61-56.501 drives design flow from bedrooms, design flow drives trench length, and trench length plus a repair area decides how much good soil the parcel has to have — shop square footage adds nothing to it. Above the Fall Line the evaluation is done in backhoe pits rather than borings alone, so the answer comes from a dug hole and not a form. The site work, the foundation and the drainfield therefore get resolved together rather than one at a time. We price the dirt before we price the building.

What a build looks like

Three stages every Oconee County project passes through, from a raw parcel to a finished home. Site work first, because that is where the budget is decided.

Aerial view of an undeveloped rural lot with cleared rough grass, planted pine along one boundary, and a red dirt access track cut through orange clay.
Stage one

The parcel

Zoning, setbacks, flood zone and utility access get checked before anything is drawn.

An excavator grading a compacted building pad on a cleared lot, with orange clay in the cut face, survey stakes and a drainage swale.
Stage two

Pad and permit

Clearing, grading and a compacted pad, while the submittal works through whichever office issues the permit where you are building.

A finished barndominium at dusk with warm interior lighting glowing through its large windows.
Stage three

Frame to finish

Shell erected and dried in, then systems, insulation and interior finish through to CO.

Those are the rules where you are building in Oconee County. Tell us what you want to build and we will draw it to them.

Nearby areas we build in

Others we cover nearby. One may be a county and another a municipality inside one — and a South Carolina municipality can sit in two counties at once — so the office that issues the permit, the fees it charges, whether the land is zoned at all, and which design map covers it can all differ from one card to the next.

Building in Oconee County: common questions

7 questions we get asked most often about building in Oconee County. If yours is not on the list, ask it directly.

Is Oconee County zoned or not?
Both answers are true, which is why the question needs rephrasing. The Zoning Enabling Ordinance is adopted, it is administered by a Zoning Official, it has a Board of Zoning Appeals, and Section 38-1.3 makes it applicable within the unincorporated areas of Oconee County. But Section 38-10.2 puts every parcel into the Control Free District as its initial district, and in that district use "shall not be regulated by this Chapter". The county's own page says all parcels in Oconee County are zoned Control Free until rezoned. S.C. Code Section 6-29-330(A) permits exactly this: a county may exercise its planning powers "in the total unincorporated area or specific parts of the unincorporated area". So the useful question is not whether the county is zoned. It is whether this parcel is. Look the tax map number up on the county's GIS parcel viewer and read the zoning classification, or ask Planning & Zoning, before you make an offer — and get the answer in writing if a large detached shop is central to your plan.
Can the shop be bigger and taller than the house?
On Control Free land, yes as far as zoning is concerned, and that is unusual enough to be worth stating carefully. Section 38-9.3 lists the ordinance's dimensional requirements — lot size, front, side and rear yards, buildable area — and then says the control free district is exempt from that section. The district itself has no dimensional table and no height cap. So nothing in Oconee's zoning measures an accessory building against the dwelling the way many South Carolina counties do. What still governs is real: the structural code for the span and the clear height you want, the flood chapter if any of the pad is in a mapped hazard area, the 65-foot height limit and 2-unit-per-acre density inside the Lake Keowee/Jocassee overlay, the septic layout, and any covenant recorded against your deed, which the county does not enforce and does not check. And if the parcel has been rezoned out of Control Free — into TRD, AD, RRD or another district — the ordinary district standards apply and this answer changes. Confirm the classification first.
Can I build it as a farm building and finish it out later?
No, and Oconee County has put its answer in writing on the form itself. S.C. Code Section 6-9-65 exempts farm structures from the building code, but defines a farm structure as one built on a farm "other than a residence or a structure attached to it". A barndominium is a residence, and the shop half under the same roof is attached to it, so neither is ever a farm structure. The exemption also has to be claimed before construction by filing an affidavit with the building official, and it evaporates on conversion. The county's Affidavit for Farm Structure reprints the statute and then adds its own position: a structure built under the exemption and later converted to residential use "would be in violation of State law and the Oconee Building Code" and must first be brought up to the current technical codes. In practice that means a shell built to no code, with no footing inspection, no framing inspection and no engineered drawings on file, has to be opened up and proved after the fact. It is the most expensive way to save money on a permit that exists.
What wind speed and seismic category should my engineer design to?
Ask the Oconee County building official, in writing, and be suspicious of any number quoted without one. South Carolina does not use the national maps for houses: Regulations 8-1202 and 8-1203 replace the residential code's wind and seismic sources with the Building Codes Council's own county maps. The Council has approved maps for 35 of the 46 counties. Oconee is one of the eleven it has not — the others are Anderson, Cherokee, Greenville, Greenwood, Laurens, McCormick, Pickens, Spartanburg, Sumter and Union. The Council's page tells the building official to consult a hazard tool where no map exists, and its own 2024 staff comment records that the ATC Hazards by Location site "ceased operation on December 31, 2024", pointing users at the ASCE Hazard Tool in its place. From 1 January 2027 the 2024 modifications move the code text itself to that tool. Until then the honest position is that no South Carolina authority publishes a design wind speed or seismic design category for Oconee County, the local official has the delineation power, and the figure belongs in the plan-review correspondence before the frame is ordered rather than in a builder's brochure. The same goes for ground snow load and frost depth: the state's residential code leaves those cells of Table R301.2 to the jurisdiction, Oconee publishes none, and the 12-inch minimum footing depth below undisturbed ground in Section R403.1.4 applies regardless.
Could my land end up zoned after I buy it?
Yes, and the mechanism is worth understanding because it is unusual. Land leaves the Control Free District only by petition or by Council action, and the petitions do not need everyone. Under the Planning District Method, the signatures of 15 percent of the owners of parcels in one of the county's seventeen Planning Districts — whose boundaries follow the service areas traditionally used by local fire stations — can start a process that ends in a new zoning map for the whole district, with a survey of owners and a Planning Commission recommendation along the way. Under the Small Area Method, owners of at least 200 combined acres, signed by 51 percent of the owners and representing 75 percent of the acreage, can petition to rezone their area; a platted subdivision or a cluster of small parcels can do it at 25 acres or 20 parcels. The county's FAQ acknowledges that up to 49 percent of the owners in an area may not have signed. And County Council can initiate a rezoning of any parcel at any time under Method 3. None of that unbuilds a lawfully built structure — the ordinance treats an existing lawful use as non-conforming until it is willfully abandoned for a year — but it can change what you may add later. If your plan depends on a future second shop, a home business or an outbuilding, build it or permit it while the ground rules are the ones you bought under.
Septic and water — who permits it and what is different in the Upstate?
The county does not do septic. Its Building Codes page says so directly, listing septic design, inspection and approval under what the division does not do. Onsite wastewater is permitted by the South Carolina Department of Environmental Services under Regulation 61-56, and two things differ from the Lowcountry. First, above the Fall Line — all of Oconee — Section 61-56.104 requires backhoe pits rather than borings alone, so the evaluation is a machine on site, not a hand auger, and the parcel has to be cleared, cornered and the house location staked before anyone comes out. Second, suitability turns on soil morphology, not a percolation test: Section 61-56.200.1 asks for soil texture, depth to restrictive horizons and depth to the zone of saturation, and the long-term acceptance rate comes from textural class. You may hire a licensed Professional Soil Classifier privately and file the soil report with the application rather than wait in the department queue. Watch the setbacks on a lake parcel: 75 feet from the mean high water of an impounded body of water, 15 feet back from the top of the slope of any cut or embankment two feet or more high where the trench sits above the invert, and 5 feet from the building and from the property line. And note the trap that catches edge-of-town acreage: a septic permit cannot issue where public sewer is accessible, however rural the parcel feels.
I am looking at lake frontage. What changes?
A great deal, and it applies even though the parcel is Control Free, because Section 38-10.2 keeps overlay districts in force there. Within 750 feet of the full pond contour of Lake Keowee or Lake Jocassee — 800 feet above mean sea level on Keowee, 1,110 on Jocassee — the Lake Overlay caps residential net density at 2 dwelling units per acre, caps building height at 65 feet above finished grade, and forbids altering the grade beyond what structural soundness requires, which is the provision that bites hardest on a big level pad cut into a slope. Waterfront parcels whose property line falls within 25 feet of full pond must establish a 25-foot natural vegetative buffer measured perpendicular from that contour, recorded on a plat in the Register of Deeds as a dedication running with the land in perpetuity — triggered at sale or transfer, and again at the first building-codes inspection of a new or expanded structure. Inside the buffer a view lane may take no more than 15 percent of the area, trees over six-inch caliper at four feet up may not be removed without a forester's or arborist's hazard certification, and trees may be limbed to half their height on an approved removal plan. Lake Hartwell frontage sits outside the overlay, but the septic setback from mean high water still applies. Add the county's three-foot freeboard and the no-basement rule wherever the mapped flood hazard reaches the site.

Building in Oconee County?

Start with the plan. Tell us what you want to build and we will draw it, then confirm which office issues the permit for your parcel, what it will let you put there, and what wind load it has to meet. That conversation costs nothing.