Johnston County building permits are issued by the Building Inspections Department from the Land Use Center at 309 E. Market Street in Smithfield (919-989-5060), for unincorporated Johnston and for nine towns that have no inspections department of their own: Archer Lodge, Benson, Kenly, Micro, Pine Level, Princeton, Selma, Smithfield, and Wilson’s Mills. Only Clayton and Four Oaks issue their own. The rule that changes how you prepare: since April 1, 2026 all construction drawings must be submitted digitally, for both residential and commercial projects. Paper plans are not accepted.
Johnston has been among the fastest-growing counties in North Carolina, sitting directly in Raleigh's path of expansion, and the department has responded by standardising intake harder than most counties its size — including a pre-approved plan system that genuinely shortens review for repeat designs.
Applies to unincorporated Johnston County and the towns of Archer Lodge, Benson, Kenly, Micro, Pine Level, Princeton, Selma, Smithfield, and Wilson’s Mills, where the town’s zoning permit comes first. Clayton and Four Oaks issue their own building permits inside their limits.
Digital drawings only. Since April 1, 2026 no paper construction plans are accepted for residential or commercial projects. The applications themselves are still published as fillable and print-only forms — it is the drawings that have to be digital.
What requires a permit in Johnston County?
A Johnston County building permit is required before most construction, alteration, repair, demolition, or change of occupancy in the county's jurisdiction. Johnston is one of the fastest-growing counties in North Carolina, which is why its Building Inspections Department has leaned harder into standardised intake than most counties its size.
Permit required
- New construction, additions, and accessory structures above the local size threshold
- Structural and load-bearing alterations and repairs
- Electrical service changes, panel work, and most wiring alterations
- Plumbing additions, repipes, gas piping, and non-identical water heater swaps
- Mechanical and HVAC installations and changeouts
- Swimming pools, including barrier and bonding requirements
- Demolition of structures, with a dedicated application
- Spray foam insulation, which carries its own required form
Typically exempt
- Nonstructural work costing $40,000 or less in a single-family home, farm building, or commercial building (G.S. 160D-1110(c))
- Replacement windows, doors, exterior siding, and porch/deck pickets, railings, stair treads, and decking
- Like-for-like plumbing swaps that keep size and capacity, and like-kind light fixtures, receptacles, and switches
- Same-spec water heater changeouts installed by a licensed contractor
- Painting, flooring, cabinetry, and other cosmetic work
North Carolina enforces one State Building Code statewide; the 2018 edition still governs while the 2024 edition waits on the State Fire Marshal and the new Residential Code Council. North Carolina rules
Johnston County building department: who handles permitting
The Johnston County Building Inspections Department is the building department for unincorporated Johnston and for most of its towns — Archer Lodge, Benson, Kenly, Micro, Pine Level, Princeton, Selma, Smithfield, and Wilson’s Mills — working out of the Land Use Center at 309 E. Market Street in Smithfield. In those towns you first get the town’s zoning or land use permit, then take that approval to the county for the building permit. Clayton has its own Inspections Department and Four Oaks issues its own permits; a Clayton mailing address outside the town limits still goes to the county.
The department has moved decisively to digital intake: effective April 1, 2026, all construction drawings for residential and commercial projects must be submitted digitally. No paper plans. Applications remain available as fillable and print-only forms, and completed packages can still be dropped at the Land Use Center — but the drawings themselves are digital now.
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|---|---|
| Office | Land Use Center, 309 E. Market Street, Smithfield, NC 27577 · 919-989-5060 · Mon–Fri 8am–5pm (permits issued to 4:30pm, inspections scheduled to 3pm) |
| inspections@johnstonnc.gov | |
| Plan format | Digital only for all construction drawings, effective April 1, 2026 |
| Permit search | By address, permit number, township and date range, or work type |
| Record depth | Six years online; older records by direct request |
| Forms | Every application published in fillable and print-only versions |
Johnston runs a pre-approved plan system. If a house design has already been approved in the county, a re-stamped pre-approved plan application replaces a fresh full review — a real advantage for builders repeating a plan across a subdivision.
This guide covers Johnston County, North Carolina, seated in Smithfield. Johnston County, Wyoming does not exist, but Johnson County — one letter different — exists in Kansas, Texas, Indiana, Iowa, and a dozen other states. The spelling is the distinguishing detail.
In 2025, building permits issued in unincorporated Johnston County authorized 2,523 new privately owned housing units, 2,175 of them single-family homes, according to the U.S. Census Bureau Building Permits Survey.
Johnston County permits: record types and what each covers
Johnston publishes each permit as its own application rather than routing everything through a universal form, so choosing the right Johnston County permit type up front avoids a rejected intake. These are the records the department issues:
Residential permit types
| Permit type | What triggers it | Review path | Fee basis |
|---|---|---|---|
| New construction | New dwellings, additions, and accessory structures above the local size threshold | Full plan review against the 2018 NC Residential Code, plus zoning | Valuation-based |
| Renovation / alteration | Load-bearing changes, work over $40,000, or added or redesigned plumbing, HVAC, or electrical | Plan review scaled to scope; 15-business-day residential clock applies | Valuation-based |
| Reroof | Roof covering replacement costing over $40,000, and any work that adds rather than replaces roofing | Inspections set by the local department; plan review rarely required | Valuation or squares |
| Solar photovoltaic | Rooftop or ground-mount PV, with or without battery storage | Electrical review led, with structural review of the attachment | Flat or system-size based |
| Battery energy storage | Wall or floor-mounted ESS added to a dwelling | Electrical review plus fire separation and location check | Flat or per-permit minimum |
| Electrical | Service changes, panel upgrades, new circuits, EV chargers, most rewiring | Trade review by the electrical inspector; filed as its own record | Per-permit minimum or per-device |
| Plumbing | New piping, repipes, fixtures, gas piping, and non-identical water heater swaps | Trade review; like-for-like same-capacity swaps are statutorily exempt | Per-permit minimum or per-fixture |
| Mechanical / HVAC | All HVAC equipment installs and changeouts, including like-for-like swaps, plus ductwork and refrigeration | Trade review by the mechanical inspector | Per-permit minimum or per-unit |
| Deck and porch | New decks and structural rebuilds; pickets, rails, treads, and decking are exempt replacements | Footing and framing review against the residential code | Flat or valuation-based |
| Pool and spa | In-ground and above-ground pools, spas, barriers, and bonding | Structural, barrier, and electrical bonding review | Valuation-based |
| Accessory structure | Sheds, detached garages, and carports above the local size threshold | Zoning first, then structural review where applicable | Flat or valuation-based |
| Demolition | Full or partial demolition of a structure | Utility disconnect verification and asbestos notification | Flat |
| Re-stamped pre-approved plan | A house design already approved by the county, reused | Reduced review path instead of a fresh full residential review | Reduced review fee |
| Spray foam insulation form | Required supplementary submittal wherever spray foam is used | Reviewed with the building record; holds a final if missing | No separate fee |
| Owner licence exemption | The statutory owner-builder route, on its own form | Attestation reviewed with the permit application | No separate fee |
Not sure this scope needs a permit?
Get a free quote →Commercial permit types
| Permit type | What triggers it | Review path | Fee basis |
|---|---|---|---|
| New construction | Ground-up commercial, industrial, and multifamily buildings | Full multi-discipline review; sealed plans required | Valuation-based |
| Upfit / tenant improvement | Interior build-outs and suite fit-ups in an existing shell | Concurrent building, trade, and fire review | Valuation-based |
| Renovation / alteration | Structural, envelope, or system changes to an existing building | Plan review scaled to scope; accessibility triggers attach | Valuation-based |
| Change of occupancy | Converting a building from one occupancy classification to another | Life-safety, accessibility, and zoning review | Valuation or flat |
| Shell building | A building permitted without a known tenant or use | Shell review only; no certificate of occupancy until an upfit closes | Valuation-based |
| Reroof | Commercial roof covering replacement or recover | Structural check on added dead load; fire review where applicable | Valuation or squares |
| Solar photovoltaic | Commercial rooftop, carport, and ground-mount arrays | Structural, electrical, and fire access review | Valuation or system-size based |
| Electrical | Service, distribution, and branch circuit work | Trade review; separate record from the building permit | Valuation or per-device |
| Plumbing | Supply, waste, vent, grease, and gas systems | Trade review; backflow and grease interceptor sign-offs attach | Valuation or per-fixture |
| Mechanical / HVAC | Rooftop units, ductwork, exhaust, and refrigeration | Trade review; energy compliance documentation required | Valuation or per-unit |
| Fire protection | Sprinkler, standpipe, alarm, hood, and suppression systems | Fire prevention review, often a separate submittal | Valuation or per-device |
| Sign | Wall, monument, and illuminated signage | Zoning review plus electrical where illuminated | Flat or per-sign |
| Backflow preventer test report | Backflow assembly installation and periodic testing | Cross-connection control review | Flat |
| Certificate of completion | Closing out work that does not warrant a certificate of occupancy | Final inspection sign-off across affected trades | Flat |
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- Single-discipline review in most cases
- One permit covers simultaneous same-address residential projects (G.S. 160D-1110(d))
- Initial review due within 15 business days; after 20, 10% of the fee is refunded for each business day late (up to 10 days)
- No engineer's or architect's seal may be demanded unless the code itself requires it
Commercial — multi-discipline
- Concurrent review across building, trades, fire, and zoning
- Signed and sealed plans where state law requires them; small commercial buildings can be exempt (G.S. 83A-13)
- Third-party plan review available under G.S. 160D-1110.1 when review stalls
- Accessibility and life-safety review attach to any change of occupancy
Records you will actually see in Johnston
| Record | What it covers |
|---|---|
| Residential building permit | New dwellings, additions, and alterations in the county's jurisdiction |
| Re-stamped pre-approved plan | A previously approved house design reused, bypassing a fresh full plan review |
| Commercial permit | Ground-up commercial, upfits, and alterations, with digital drawings required |
| Residential trade permit | Electrical, plumbing, and mechanical work filed by the licensed contractor |
| Swimming pool permit | Pools and spas with barrier, structural, and bonding review |
| Demolition permit | Full or partial demolition with utility disconnect verification |
| Owner licence exemption | The statutory owner-builder route, filed on its own form |
| Spray foam insulation form | A required supplementary submittal where spray foam is used |
Rather not deal with the Johnston County building department?
Get a free quote →Solar permits in Johnston
Solar in Johnston files as an electrical-led record with structural backup, and the digital drawing requirement applies to the array layout and attachment detail exactly as it does to a house plan.
Roofing permits in Johnston
Reroofs in the county's jurisdiction are county permits. The permit search by work type is useful here — you can pull every roofing permit issued in a township over a date range, which makes checking a property's roofing history quick.
Solar covenants and the roofing permit exemption are set by state law, and utilities run interconnection on their own timeline. North Carolina rules
Johnston County permit cost
Johnston County building permit fees follow the department's published fee schedule, with separate charges for the building record and each trade permit. The schedule is the authoritative source and is adopted on the county's own cycle.
Budget for the review path as much as the fee. The pre-approved plan route can materially compress a repeat build's timeline, while a first-time custom design carries a full residential review with the statutory clock attached to it.
| Fee component | How it works |
|---|---|
| Building permit | Published county fee schedule, by scope and record type |
| Trade permits (E/P/M) | Charged separately per trade record |
| Plan review | Full review for new designs; reduced path for re-stamped pre-approved plans |
| Re-inspection | Charged on failed inspections before final or certificate |
| Records | Six years of permits searchable online at no cost |
| Digital submittal | Required for all construction drawings since April 1, 2026 |
Want a precise number for a specific Johnston project? Send us the scope and we will price the permit path before you file.
Johnston County trade permits
Johnston County trade permits for electrical, plumbing, and mechanical work are separate records pulled by the state-licensed contractor performing the work, filed on the county's residential or commercial trade applications.
Electrical permits
Required for services, panel upgrades, circuits, EV chargers, and solar interconnection. Electrical work takes a contractor licensed by the NC State Board of Examiners of Electrical Contractors, unless owners wire their own home that is not for sale or rent.
Plumbing permits
Required for new piping, repipes, fixtures, gas piping, and water heater changeouts that alter capacity, fuel, location, or venting.
Mechanical (HVAC) permits
Required for all installations and changeouts, including like-for-like swaps, plus ductwork and refrigeration, by a state-licensed heating contractor.
Specialty submittals
Spray foam insulation carries a required form, and backflow preventer testing has its own report — both are easy to miss and both hold up a final.
Want this handled start to finish?
Get a free quote →Johnston County permit application: how to apply step by step
Here is how to get a building permit in Johnston County, from confirming the requirement through to close-out. Each step below corresponds to a real decision point where projects commonly stall.
Establish whether the parcel falls under the county or an incorporated municipality, and confirm the work triggers a permit under the state code.
If the house design already exists in the county's pre-approved system, file the re-stamped application instead of a full plan review.
All construction drawings must be digital. Assemble the plan set, code summary, and supporting forms before you submit.
File the matching application — residential, commercial, trade, pool, or demolition — with the digital drawings attached.
Resolve comments and resubmit. On residential plans the state's 15-business-day clock and its fee-refund remedy apply.
Pay the scheduled fees, request inspections against the permit, and run through to your certificate of occupancy or completion.
Inspections in Johnston County
Johnston County inspections are requested against the permit record, and inspection status is visible through the department's online lookups alongside the permit itself. Typical checkpoints run footing and foundation, rough-in trades, framing, insulation, and final.
The county's permit search is unusually flexible — by address, by permit number, by township and date range, or by work type — with six years of records online. If a local government reviews residential plans at all, G.S. 160D-1110(b) requires the initial review within 15 business days of submission — and if it slips past 20 business days, the jurisdiction must refund 10% of the total permit fee for every business day of delay, up to 10 days (a full refund). The same subsection bars requiring an engineer's or architect's seal on one- and two-family plans unless the code itself demands it.
Keep the permit and approved plans on site. A North Carolina building permit expires six months after issuance if work has not begun (local ordinance can set less), and immediately if work stops for 12 months (G.S. 160D-1111); changes from approved plans need written approval from the inspection department first, unless the code clearly allows the change (G.S. 160D-1112). Records older than six years are held by the department and released on request, per state records retention.
Johnston County permit search and official resources
Run a Johnston County permit search by address, township, or work type, download an application, or check inspection status with the official links below.
- Johnston County Building Inspections
- Johnston County permit searches
- Applications and forms
- NC Licensing Board for General Contractors
- LiensNC — designate a lien agent (jobs of $40,000 or more)
- NC State Building Code (OSFM)
Inspections are where schedules slip.
Get a free quote →Frequently asked questions
Who issues building permits in Johnston County?
The Johnston County Building Inspections Department, working from the Land Use Center at 309 E. Market Street in Smithfield (919-989-5060). It covers unincorporated Johnston and the towns of Archer Lodge, Benson, Kenly, Micro, Pine Level, Princeton, Selma, Smithfield, and Wilson’s Mills (town zoning approval first). Clayton and Four Oaks issue their own permits inside their limits.
Does Johnston County accept paper construction drawings?
No. Effective April 1, 2026, all construction drawings for residential and commercial projects must be submitted digitally. Applications themselves are still published in fillable and print-only versions, but the drawings have to be digital.
How do I run a Johnston County permit search?
The department offers several lookups: by address, by permit number, by township and date range, and by work type. Six years of building permits are available online, which is the retention period the department maintains for online access.
What is a pre-approved plan in Johnston County?
A house design already approved by the county, which can be reused through a re-stamped pre-approved plan application rather than a fresh full review — useful for builders repeating a design across a subdivision.
How much does a Johnston County building permit cost?
Fees follow the department's published fee schedule, with separate charges for the building record and each trade permit. Because the schedule is adopted on the county's own cycle, confirm current figures before budgeting rather than relying on any published article.
How long does a Johnston County residential plan review take?
State law requires the initial review of residential plans within 15 business days, and if it runs past 20 business days the jurisdiction must refund 10 percent of the total permit fee for each additional business day, up to a full refund.
Can I pull my own permit as a homeowner in Johnston County?
North Carolina allows an owner-builder exemption from general contractor licensure in defined circumstances, and Johnston publishes a dedicated Owner Licence Exemption form for it. Read the form's attestations carefully — a false claim carries real consequences.
Do I need a permit for a swimming pool in Johnston County?
Yes. Pools have their own application and carry barrier, structural, and electrical bonding review. The barrier requirements in particular are checked at final and are a frequent cause of a failed inspection.
When is a general contractor licence required in Johnston County?
On projects of $40,000 or more, under G.S. 87-1 and the NC Licensing Board for General Contractors, with licence tiers capping single-project value at $750,000, $1,500,000, or without limit.
Do I need a lien agent for a Johnston County project?
For work costing $40,000 or more, yes — the owner must designate a lien agent through LiensNC before the permit can issue. Improvements to an owner-occupied existing single-family residence are exempt.
What extra forms does Johnston County require?
Two catch people out: a spray foam insulation form where spray foam is used, and a backflow preventer test and maintenance report where a backflow assembly is installed. Both are easy to overlook and both can hold a final inspection.
When does a Johnston County building permit expire?
Under G.S. 160D-1111 a permit expires six months after issuance if work has not commenced, and expires if work is discontinued for 12 months. Changes to approved plans need written approval from the inspection department before the work is done.
Simplify Johnston County permitting with Alliance Permitting
A digital-only plan requirement, a pre-approved plan route worth using, and supplementary forms that quietly hold finals — Johnston rewards a filer who knows the department's habits. That is what a permit expediter for Johnston County provides: we prepare the digital set, pick the review path, and carry the record through to certificate.
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Contractors and builders choose Alliance for Johnston because the work is done by people who have stood at the counter:
- Digital-ready submittals — plan sets prepared to the county's format the first time, not after a rejected intake.
- Complete oversight — every Johnston permit and inspection tracked across your jobs in one place.
- Complete submissions — the supplementary forms that hold finals are caught before they do.
Alliance Permitting is a permit documentation and expediting service. We are not a law firm and do not provide legal advice, and we are not the permitting authority.
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More North Carolina permitting guides
This guide is provided by Alliance Permitting for general information about Johnston County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.