Rolling farmland and mixed hardwood near the fall line with red soil showing in a farm track, dense loblolly pine on one edge and a wooded creek bottom beyond.
Wake & Chatham Counties 2018 NC Residential Code, statewide

Barndominium Builders in Apex, NC

Apex is a town in Wake and Chatham counties, and it is one of the fastest-growing places in North Carolina: 64,366 people at the 2020 census base, 80,419 on the Census Bureau's 2025 estimate, a rise of 24.9 percent in five years. That growth is the honest answer to the question this page exists to settle. Land that would carry a barndominium — five acres, ten, twenty, with room for a shop bay and a drainfield — is not what changes hands inside the Apex town limits. Wake County as a whole is 11.7 percent farmland with a median farm of 32 acres, and the parts of it inside a fast-growing municipality are the parts already spoken for. So this page will not pretend you can buy acreage in Apex. It tells you what is genuinely useful about Apex instead, and where to look next. What is useful is jurisdiction. Apex runs its own building department: the Town of Apex Building Inspections and Permitting division enforces the North Carolina codes, reviews the plans and sends the inspectors, and it prices a new dwelling on gross square footage — $0.35 a square foot with a $500 minimum, and a published formula that charges the footage above 3,000 gross square feet at three-quarters of that rate. Its authority does not stop at the town line either. Under G.S. 160D-202 the town's zoning, subdivision rules and building-code enforcement reach into an extraterritorial jurisdiction beyond the corporate boundary — Apex's ETJ was expanded in 2007, with Wake County's approval, from roughly 3,860 acres to 13,510 — while the town's property tax and the town's ballot stop at the corporate line. And once you are outside both, the county line does the rest of the work: it decides which inspections department holds your file, how the fee is even calculated, which health department permits the septic system, and in Harnett's case what the design wind speed is. Chatham to the west and Harnett to the south are where a serious Apex land search ends up.

Apex at a glance

Counties
Wake & Chatham Counties
City rules outside city limits
Apex enforces its zoning, subdivision rules and the building code in an extraterritorial jurisdiction beyond the town line under G.S. 160D-202 — land that pays no Apex property tax and cannot vote in an Apex election.
Cities & counties covered
Wake County part 80,387 · Chatham County part 32
Site visits
Same week across Apex and the Triangle
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Building conditions in Apex

The building code does not change at a county line here. Under § 143-138(e) the North Carolina State Building Code applies throughout the state, and a city or county may adopt only a fire prevention code and floodplain regulations of its own — there is no general local amendment power, so there are no county amendments to look up. The edition in force is still the 2018 NC Residential Code, effective 1 January 2019; the 2024 edition has been delayed three times and carries no effective date at all. What genuinely differs is who issues the permit and inspects the work, what that office charges, how the parcel is zoned, what the local floodplain ordinance requires of the foundation — and two design numbers the code publishes county by county, the ultimate design wind speed and the seismic design category. The rest of Table R301.2 is set once for everyone: a flat 20 psf roof live load, a 12-inch frost line, Moderate weathering, and termite protection required everywhere in the state with no exemption. There is no ground snow load column in the residential code at all.

Build conditions for Apex , Wake & Chatham Counties, North Carolina : ultimate design wind speed 115 mph. BUILD CONDITIONS APEX, NCWake & Chatham Counties2018 NC RESIDENTIAL CODEULTIMATE DESIGN WIND SPEED115 mphWake and Chatham Counties are both unlisted in Table R301.2(4) of the 2018 NC Residential Code, soboth take its 115 mph default. Harnett County is listed in that same table at 120 mph.WHO ISSUES THE PERMITTown of Apex Building Inspections an…322 N. Mason Street, Apex. Outside the town limits and its ETJ, thepermit belongs to Wake County, Chatham County or Harnett County —…
Build conditions for Apex, drawn from the sourced facts on this page. Every figure above is cited in the quick-facts panel below, with its source and vintage.
Up 24.9 percent in five years — and 32 of those people are in Chatham
The Census Bureau's Vintage 2025 subcounty estimates put Apex at 80,419, against a 2020 census base of 64,366. That is a 24.9 percent rise in five years, the largest of any large town in the Triangle, ahead of Clayton at 24.0 percent and Wake Forest at 21.1. The same file splits the town across two counties: 80,387 on the Wake side and 32 on the Chatham side. Thirty-two people. That sliver is not a rounding artefact — it is a corporate boundary that has crossed the county line, and it is the reason the county question has to be asked of the parcel rather than of the town. Growth at that rate is also the plain reason a barndominium buyer does not find acreage here: the land inside the limits is being consumed, not released.

U.S. Census Bureau, Vintage 2025 subcounty population estimates, sub-est2025_37, SUMLEV 157 county-part records for Apex town, census.gov

Apex writes its own permit, and it bills the whole slab
The Town of Apex Building Inspections and Permitting division issues the building permit inside the town limits and its ETJ, and its own fee schedule, effective 1 July 2026, prices a new single-family dwelling at $0.35 per gross square foot with a $500 minimum. The word is gross. Above 3,000 gross square feet the schedule publishes a formula — the first 3,000 at $0.35, and the additional footage at $0.35 times 0.75 — so a large unheated shop bay is fully inside the fee base but is billed at three-quarters of the base rate once the building passes 3,000 square feet under roof. Plan review is separate and does not come off the permit: $110 for a new single-family or townhome, non-refundable and expressly not applied toward the cost of the permit. Work started without a permit is billed at double.

Town of Apex, North Carolina Fee Schedule, effective 7/1/2026, One and Two Family Dwelling Permit Fees and Plan Review Fees, apexnc.org/184/Permit-Fee-Schedules, read 6 September 2026

Drive twenty miles south and the design wind speed changes
Wake and Chatham Counties are both absent from Table R301.2(4) of the 2018 NC Residential Code, so both take that table's unlisted default of 115 mph ultimate design wind speed — the code's floor, shared by 51 of the 100 counties. Harnett County is not absent from it. Harnett is listed, at 120 mph. So a shell engineered for a Chatham parcel is not automatically engineered for a Harnett one, even though the two sit in the same energy climate zone, the same seismic category and the same commute. It is a small step up and an easy one to design for — but it is a real difference in the code in force, and it is the kind of thing that gets discovered at plan review rather than at quote. Name the edition on the drawings: the 2018 code governs, and the 2024 edition has no effective date at all.

2018 NC Residential Code, Tables R301.2(4) and R301.2(7) and Table N1101.7, NC Office of the State Fire Marshal, ncosfm.gov

Apex's rules reach three miles out; Apex's tax rate stops at the line
Under G.S. 160D-202 a North Carolina municipality of 25,000 or more may enforce its zoning, its subdivision regulation, its building code and its minimum housing standards up to three miles beyond its corporate boundary. Apex, at 80,419, is well into that tier, and its extraterritorial jurisdiction was expanded in 2007 from roughly 3,860 acres to 13,510 with the Wake County Board of Commissioners' approval — that county approval being the statutory price of reaching past the first mile. What does not travel outward with those powers is the town's police jurisdiction, its trash collection, its noise and nuisance ordinances, its business licensing, its ballot and its property tax, which the town's own fee schedule sets at $0.3735 per $100 of valuation. A parcel in the ETJ is regulated by a council its owner does not fund and cannot vote against. G.S. 160D-307 answers part of that by requiring ETJ residents on the town's planning board and board of adjustment, appointed by the county commissioners.

Town of Apex Fee Schedule effective 7/1/2026 (tax rate) and Apex Extraterritorial Jurisdiction (ETJ) dataset, apexnc.org and gisdata-apexnc.opendata.arcgis.com, read 6 September 2026; UNC School of Government legal summary on extraterritorial jurisdiction and Coates' Canons, sog.unc.edu

Step outside the town and three counties measure the same house three ways
There is no North Carolina permit fee, and the three counties an Apex buyer actually shops in prove it. Wake County charges $75 plus $0.25 per square foot of gross floor area and states in terms that there is no deduction for a garage — the shop is billable. Chatham County charges $0.40 per square foot with a $400 minimum, does not define on its published schedule whether that footage is heated or under-roof, and adds an education impact fee of $3,500 on a single-family dwelling where required, which dwarfs the permit itself by roughly an order of magnitude. Harnett County does not use a rate at all: it charges from a bracket table running $600 for 1,000 to 1,200 square feet up to $1,390 at 4,501 to 5,000, and the dimension it brackets on is heated plus garage, so the shop moves you up the table. Same drawings, three bills, three different questions asked of them.

Wake County Permits and Inspections Fee Schedule, wake.gov; Chatham County Central Permitting Fee Schedule, effective for fees paid after 30 June 2026, chathamcountync.gov; Harnett County Central Permitting fee schedule cp-fees-23-24.pdf, header dated 11 August 2023, harnett.org. All read 5 September 2026. Harnett's is the last schedule that county publishes and states no fiscal year.

Where the acreage actually is: Chatham and Harnett
The 2022 Census of Agriculture measures Wake County at 664 farms on 62,323 acres — 11.7 percent of the county, median farm 32 acres. Chatham County runs 1,076 farms on 114,051 acres, 26.1 percent of the county, median farm 49 acres. Harnett County runs 563 farms on 109,179 acres, 28.7 percent, median 40. Both ring counties are growing hard on their own account — Chatham 11.6 percent since 2020 and Harnett 12.4 percent — and Harnett is the rarer case of a county that anchors its own micropolitan statistical area, named for the Anderson Creek community, which the Census counts at 13,636 people. Statewide the median North Carolina farm is 48 acres, so a parcel of the size this building type wants is an ordinary thing to buy in either county and an extraordinary thing to buy in Apex.

USDA NASS, 2022 Census of Agriculture, county profiles for Wake, Chatham and Harnett, nass.usda.gov; U.S. Census Bureau Vintage 2025 county and place estimates, census.gov

Also worth knowing before you build in Apex

Well and septic cost more than the building permit, and the county sets that too
Environmental health is a separate department on a separate schedule almost everywhere in North Carolina, and a buyer reading only the building fee schedule under-budgets. Wake County Environmental Services, Onsite Water Protection charges $400 for the improvement permit and $400 for the construction authorization, which it states includes the operation permit, and $800 for a new private drinking-water well permit covering the contamination-source review, the inspections and the laboratory analysis — $1,600 before a single inspection of the house itself. Harnett County is the unusual one: building, trades, environmental health, fire marshal and land use all sit on one schedule paid at one counter, at $750 for the combined soil analysis and improvement permit and $250 for a new well. Chatham County scales the improvement permit by bedroom count — $150 at two bedrooms rising to $400 at six — then prices the construction authorization separately by system type, $160 for Type I up to $1,000 for Type VI, with a $340 well permit that includes the analyses state law requires within thirty days.

Wake County Onsite Water Protection wastewater and well fee pages, wake.gov; Harnett County Central Permitting fee schedule, harnett.org; Chatham County Public Health Department Division of Environmental Health fee schedule stated effective 1 July 2024, chathamcountync.gov. All read 5 September 2026.

Forty thousand dollars is the number that changes who may hold the permit
The Town of Apex's own permitting instructions require any project costing more than $40,000 to submit a workers' compensation affidavit, a certificate of insurance issued to the Town of Apex and a lien agent form. That threshold is not a town invention — it is the general contractor licensing line. N.C.G.S. § 87-1(a) sets $40,000 as the cost of the undertaking above which the work is general contracting, and § 87-14(b) makes it unlawful for an inspector to issue a permit for such a job to anyone not licensed under Article 1 of Chapter 87 or exempt from it. A barndominium is essentially always above the line. The owner-builder exemption at § 87-14(a)(1) exists, but it is narrower than it reads: the owner must personally superintend the work, may not delegate it to unlicensed persons, and must be personally present at every inspection — unless the plans were drawn and sealed by a licensed architect.

Town of Apex, Obtaining a Building Permit, apexnc.org/596/Obtaining-A-Building-Permit, read 6 September 2026; N.C.G.S. §§ 87-1 and 87-14

The town charges to tell you where the riparian buffer is
Apex's fee schedule carries two lines that most municipal schedules do not: a riparian buffer determination at $400 and a riparian buffer authorization at $200. That is worth knowing before a land purchase rather than after, because in the North Carolina nutrient strategies a buffer is created by a blue line on the USGS topographic map or the county soil survey, not by anything visible on the ground, and an on-site determination is what removes one that is not really there. The town also carries a water bacteriological sample fee of $250, states that it does not install water or sewer taps for new residential construction, and prices a four-inch sewer tap at $2,500 with $1,500 more for a street cut — figures that only apply on the town's utilities, which is precisely the trade a buyer makes when they leave for a well and a drainfield in the county.

Town of Apex, North Carolina Fee Schedule, effective 7/1/2026, apexnc.org/184/Permit-Fee-Schedules, read 6 September 2026; 15A NCAC 02B riparian buffer rules, NC Office of Administrative Hearings

An excavator grading a compacted building pad on a cleared lot, with survey stakes, a drainage swale and a silt fence along the downhill edge.
Below the slab

The expensive surprises are in the ground, not the building

What moves a North Carolina budget is usually below grade, and the thing most often got wrong is which clay to worry about. Cecil — the red Piedmont clay everyone pictures, and the state soil — is kaolinitic and low shrink-swell; it does not heave. The soil that does is Iredell, formed over diabase and gabbro, which the USDA describes as vertic, very high shrink-swell, with a perched water table a foot or two down from December through April. The tell is colour: Cecil is red and Iredell is dark grey-brown, and they sit within a few miles of each other across the central Piedmont. West of that the question stops being clay and becomes slope, rock and colluvium; east of the fall line it becomes water, and in the Tidewater it becomes organic soil that subsides irreversibly once it is drained. Then the same ground decides the septic system, and North Carolina rewrote those rules recently enough that most of what is published about them is out of date. 15A NCAC 18E replaced the old subchapter on 1 January 2024 and was amended again on 1 June 2026: the site is classified on soil morphology — the word "percolation" does not appear anywhere in it — and there is no "provisionally suitable" any more, only suitable or unsuitable, on a single failed parameter. There is no statewide minimum lot size either; the area you need is derived from the soil result and then doubled, because a site that cannot fit both the initial field and its repair area is unsuitable. And the order matters more than people expect: the county health department's Improvement Permit and Construction Authorization come first, and the building permit is available on the strength of the Construction Authorization, not before it. One more thing that catches people: disturb more than an acre and you need an approved erosion and sedimentation control plan in hand before work starts, with penalties up to $5,000 a day, and a pad plus a drive plus a drainfield plus a laydown area crosses an acre faster than it sounds. So the site work, the foundation and the drainfield get resolved together rather than one at a time. We price the dirt before we price the building.

What we build in Apex

All nine services are available in Apex. What a build costs depends far more on the parcel than on square footage, so we price against your land rather than publishing a rate card.

Barndominium Kits

Engineered shell packages drawn to your own county's wind and seismic numbers under the 2018 NC Residential Code, with the exclusions written down.

Custom Plans

Barndominium floor plans drawn for your parcel, your county's design figures and the septic system your bedroom count will actually need.

Metal Homes

Metal building homes finished to live in — envelope, insulation, condensation control and interior finish specified to your NC county's climate zone.

See all nine services

What a build looks like

Three stages every Apex 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 grass, a mixed oak, hickory and pine treeline, exposed red clay in one corner and a pale gravel access track.
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 survey stakes, a drainage swale and a silt fence along the downhill edge.
Stage two

Pad and permit

Clearing, grading and a compacted pad, while the septic authorization and the building submittal work through whichever offices cover your parcel.

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 Apex. Tell us what you want to build and we will draw it to them.

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Where we build around Apex

Wake & Chatham Counties and the rural land around it. The buildable acreage for a project this size usually sits outside the town limits — which does not automatically put it under the county, because a town's zoning and building-code enforcement reach one to three miles past its limits into its extraterritorial jurisdiction. Inside the limits, in the ETJ, or in neither are three different answers to who issues your permit.

The Apex service area, including the rural acreage outside the built-up edge, which is where the parcels big enough for a build like this usually sit. The map marks the territory we build in. It is not a branch location, and there is no office at this pin.

Keep reading

The questions that usually come next once you know what Apex allows.

Barndominium Cost Guide

What the named, dated sources actually publish for North Carolina, with a calculator built on the same figures.

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Is It Legal in North Carolina?

Why a "farm building" is defined as nonresidential, and the ten-acre right § 160D-903(b) gives you in exchange for building to the code.

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How Long Does It Take?

Census build-duration data, and what actually sets the permit clock where you are building.

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Nearby areas we build in

Others we cover nearby. Every North Carolina municipality sits inside a county — there are no independent cities here — but that does not settle who regulates a given parcel. A town's zoning, subdivision rules and building-code enforcement extend one to three miles beyond its limits, by population, into what the statute calls its extraterritorial jurisdiction; town taxes and town elections do not follow. So the office that issues the permit, what it charges and how the land is zoned can all differ from one card to the next, and the mailing address will not tell you which case you are in.

Chatham County

Chatham County
Cary

Wake, Chatham & Durham Counties
Wake County

Wake County
Harnett County

Harnett County

Building in Apex: common questions

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

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Can I actually build a barndominium in Apex?
Honestly, almost never on the kind of parcel this building type wants. Apex went from 64,366 people to 80,419 between 2020 and 2025, a rise of 24.9 percent, and Wake County as a whole is only 11.7 percent farmland with a median farm of 32 acres. Acreage inside a town growing at that rate is being built on, not listed. The realistic search is Chatham County to the west — 1,076 farms on 114,051 acres, 26.1 percent of the county, median farm 49 acres — or Harnett County to the south, 563 farms on 109,179 acres, 28.7 percent, median 40. Both are inside a normal Triangle commute, both are growing on their own account, and in both a five-to-twenty-acre parcel is an ordinary purchase. Saying that plainly is more use to you than a page implying otherwise.
Who issues the building permit for an Apex address?
Inside the town limits, the Town of Apex Building Inspections and Permitting division at 322 N. Mason Street. It reviews the plans, issues the permit and sends its own inspectors, enforcing the North Carolina State Building Codes. The same is true in the town's extraterritorial jurisdiction, which is the part people get wrong: under G.S. 160D-202 a municipality of Apex's size may enforce its zoning, subdivision regulation and building code up to three miles past the corporate boundary, on land the town does not tax and whose residents cannot vote in town elections. Apex's ETJ was expanded in 2007 from roughly 3,860 acres to 13,510 with the Wake County commissioners' approval, and the boundary is drawn on the town's Official Zoning District Map and published as a GIS layer on its open-data portal. Outside both, the answer is the county: Wake County Permits and Inspections, Chatham County Central Permitting in Pittsboro, or Harnett County Central Permitting in Lillington. A rural mailing address settles none of this. The zoning map and the register of deeds do.
Which county is my parcel in, and why does it matter here?
Apex spans Wake and Chatham, and the Census estimates split it 80,387 to 32 — so the town is almost entirely a Wake place with a Chatham sliver, which is exactly why the distinction gets missed. Once you are shopping outside the limits the county decides four things the town cannot. It decides which inspections department holds your file. It decides how the fee is calculated: Wake charges $75 plus $0.25 per square foot of gross floor area with no deduction for a garage, Chatham $0.40 per square foot with a $400 minimum plus a $3,500 education impact fee where required, Harnett from a bracket table measured on heated plus garage. It decides which health department permits your septic system and your well, and 15A NCAC 18E .0201(e) ties that to the county where the taxes are paid. And in one case it decides a design number: Harnett County is listed in Table R301.2(4) of the 2018 NC Residential Code at 120 mph, while Wake and Chatham take the unlisted 115 mph default.
What does the permit actually cost in Apex?
The Town of Apex fee schedule effective 1 July 2026 prices a new single-family dwelling at $0.35 per gross square foot with a $500 minimum, and for a building over 3,000 gross square feet publishes a formula charging the first 3,000 at that rate and the additional footage at $0.35 times 0.75. Because the base is gross area, an unheated shop bay is fully inside it — though above 3,000 square feet it is inside at the reduced rate. Plan review is $110 for a new single-family or townhome, non-refundable, and the schedule states expressly that it is not applied toward the cost of the permit. Re-inspections are $100 and $150 where previous violations have not been corrected, and work started without a permit is charged at double. Those are the town's own published figures, and they are the only kind of dollar figure worth quoting to you — this site publishes no construction price of its own, because no reliable North Carolina cost-to-build figure exists to publish.
Do I need to check Apex's building-code amendments?
There are none, and it is worth saying because it is the opposite of what most sites in this trade imply. N.C.G.S. § 143-138(e) provides that the State Building Code applies throughout the State, and the only things a city or county may adopt of their own are a fire prevention code — which needs Residential Code Council approval and cannot reach one- and two-family dwellings beyond what the Residential Code prescriptively requires — and floodplain management regulations. There is no general local building-code amendment power in North Carolina at all, so no town here can impose a stricter structural, foundation or energy requirement on a house. What genuinely varies, and what this page is about, is a different list: zoning and subdivision regulation under Chapter 160D, the extraterritorial jurisdiction, the fee schedule and its basis, the health department, floodplain and watershed regulation, and the wind and seismic values published county by county inside the one statewide code.
What are the design numbers for a build around Apex?
Wake and Chatham Counties are both unlisted in Table R301.2(4) of the 2018 NC Residential Code, so both carry its default of 115 mph ultimate design wind speed. Harnett County is listed at 120 mph. None of the three appears on the Table R301.2(7) list of Seismic Design Category C counties, so all three fall in Category A or B, and all three are IECC climate zone 4A under Table N1101.7. Several figures do not vary anywhere in the state and are worth having: a flat 20 psf roof live load, a 12-inch frost line depth, Moderate weathering, and termite protection required in all of North Carolina at a Moderate-Heavy severity. There is no ground snow load column in the code at all, because Section R301.2.3 is deleted, and R403.3 — the frost-protected shallow foundation route — is deleted too, which matters to a slab design. One more that catches metal-building buyers: North Carolina deleted cold-formed steel framing from the accepted methods of termite protection, so a steel-framed house here still needs chemical treatment or baiting.
Will I need an engineer?
For a metal-frame or post-frame building, usually yes, and it is better to budget it than to meet it at plan review. Section R301.1.2 of the residential code requires framing systems outside its prescriptive scope to demonstrate equivalent detailing, and North Carolina provides no residential escape from the engineering requirement: § 83A-13(c)(1) exempts a family residence from the architect requirement, but § 89C-25 carries no equivalent carve-out for engineering — the subdivisions that would have provided one were repealed in 2011 and 2014. So a barndominium in the Triangle is normally an engineered building, sealed by a professional engineer licensed in North Carolina. There is a second reason to think about sealed drawings early: § 87-14(a)(1) requires an owner-builder to personally superintend the work and attend every inspection, unless the plans were drawn and sealed by a licensed architect.
Is Apex in a hurricane or wind-borne debris zone?
No. North Carolina writes its wind-borne debris region as a geographic line rather than a wind-speed trigger — east of the Intracoastal Waterway from the South Carolina line up to Beaufort Inlet, and then the barrier islands north of there — which produces a result that surprises people: a 150 mph mainland site in Brunswick County is outside the region, while a 130 mph site at Nags Head is inside it. The Triangle is nowhere near it, so Section R301.2.1.2's impact-glazing and shutter requirements do not apply to a build here, and neither Wake nor Chatham carries anything above the code's 115 mph floor. Any quote that prices hurricane-rated glazing for an Apex-area build is pricing a requirement the code does not impose here.

Building in Apex?

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.

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