NC Mechanical License Lookup: Classifications and Complaints

To run an NC mechanical license lookup, go to the North Carolina State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors’ verification tool at public.nclicensing.org/Public/Search. The search is free, takes a minute, and tells you whether a contractor’s credential is currently active and what work it authorizes.¹

How to Run the Search

Every field on the search page is optional, but you have to fill in at least one. The available fields are classification type, license number, company name, first and last name, phone number, street address, city, state, and zip.¹

The license number is the fastest route if the contractor will give it to you. Ask. A legitimate contractor should hand it over without hesitation.

Without a number, combine a last name with a city. That usually produces cleaner results than the company name alone, because the registered business name on file often differs from what appears on a truck, website, or invoice. A checkbox next to the name field lets you include similar-sounding spellings, which helps when you’re working from a phone call rather than a business card. There is no county filter, so use city instead.

Reading the Results

The results page returns the contractor’s name, company, location, license classification, and status. The status field is what you’re really there for. “Active” means the contractor has met current requirements and can legally perform work. Anything else means they cannot.

Watch the calendar. All North Carolina mechanical licenses expire on December 31 each year. Contractors who miss the January deadline face a $25 late fee, and a license that lapses for more than three years cannot be reissued without the contractor retaking the examination.² If you’re signing a contract in late December or early January, check again right before work begins. An estimate written in November against an active license doesn’t guarantee that license is still active in February.

Then match the classification to your job. A Plumbing Class II license won’t cover a commercial sprinkler system. A Heating Group 3 license won’t cover a commercial HVAC project above 15 tons of refrigeration capacity. A mismatch shows up later as a permit denial or a failed inspection.

What the Classifications Mean

The board issues two broad classes: Class I covers all structures, and Class II is limited to single-family detached homes.³ Trade categories within those classes include:

Plumbing (Class I and Class II): water supply pipes, fixtures, and sewage or waste systems.³
Heating Group 1: steam, vapor, and hot water heating systems with associated piping, ducts, and equipment.
Heating Group 2: heating and cooling systems above 15 tons of mechanical refrigeration capacity. A system installed in a single-family home falls under Group 3 regardless of size.
Heating Group 3: direct heating and cooling systems, including typical forced-air residential HVAC, with 15 tons of refrigeration capacity or less. This is the common residential category.
Fire Sprinkler: installation contractors, inspection contractors, inspection technicians, maintenance technicians, and residential-specific categories.
Fuel Piping: gas line installation and service, with separate contractor and technician tiers.

For a home furnace or air conditioner replacement, look for Heating Group 3 at minimum. For a large commercial chiller, you need Heating Group 2.

One boundary worth naming: this board does not license electricians or general contractors. If you’re vetting an electrician, that lookup runs on a separate portal maintained by the NC Board of Examiners of Electrical Contractors.

Checking Complaint History

The license search shows current status, not disciplinary history. To see whether a contractor has faced past action, you request closed complaint files separately through the “Request Closed Complaint” section at public.nclicensing.org. Each file costs $10, and you need the complaint file number to submit the request.⁴

If you don’t have a file number, contact the board directly. The board is required by law to keep detailed complaint records on each licensee,⁵ so the information exists even when it doesn’t surface in the basic license lookup.

What It Costs You to Skip the Check

Performing plumbing, heating, or fire sprinkler work for pay without a license is a misdemeanor in North Carolina, and the board can also seek an injunction to stop work already underway.⁶ The board itself is direct with consumers: hire an unlicensed contractor and you have few legal recourses. Most carry no insurance, leaving you exposed to injury and property damage costs.⁷

A few warning signs worth watching for:

A contractor who asks you to pull the permits in your own name. Permits are the contractor’s responsibility, and the request often means they’re unlicensed or have code-violation history.⁷
Work that fails local inspection, which can hold up a home sale or complicate an insurance claim.
A contractor who claims to “work under” someone else’s license. License sharing is illegal.⁷

Filing a Complaint

If a contractor did substandard work, misrepresented their credentials, or turned out to be unlicensed, file a complaint through the board’s portal at public.nclicensing.org/Complaint/New.¹ Anyone can file charges alleging fraud, deceit, gross negligence, incompetency, or failure to comply with board rules. All complaints must be in writing.⁵ The board can revoke or suspend the license, issue a formal reprimand, or place the contractor on probation.

Federal Certifications to Verify Alongside the State License

A state license authorizes the trade work. Two federal certifications cover specific tasks and are worth checking depending on the job.

EPA Section 608 for Refrigerant Work

Any technician who handles refrigerants in air conditioning or refrigeration equipment must hold EPA Section 608 certification under the Clean Air Act, covering both ozone-depleting refrigerants and newer HFC substitutes.⁸ The certification does not expire and comes in different types tied to the equipment involved. A technician installing, repairing, or servicing an AC system should be able to produce their EPA card. Third-party testing organizations such as the ESCO Institute maintain online lookups to verify a technician by name.

EPA Lead-Safe Certification for Pre-1978 Homes

If your home was built before 1978, federal law requires any paid contractor whose work disturbs painted surfaces to be a lead-safe certified firm. That includes plumbing and HVAC work that involves cutting into walls, removing fixtures, or replacing windows. Minor repairs that disturb less than six square feet of paint per interior room, or 20 square feet on the exterior, are exempt, but window replacement and demolition of painted surfaces are always covered regardless of size.⁹

1
State Board of Examiners of Plumbing, Heating & Fire Sprinkler Contractors. Verify License Search
2
North Carolina General Assembly. North Carolina Code 87-22 – License Fee; Expiration and Renewal
3
North Carolina General Assembly. North Carolina Code 87-21 – Definitions; Contractors Licensed by Board
4
State Board of Examiners of Plumbing, Heating & Fire Sprinkler Contractors. Request for Copy of Closed Complaint Files
5
North Carolina General Assembly. North Carolina Code 87-23 – Revocation or Suspension of License for Cause
6
North Carolina State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors. Board Laws and Rules
7
North Carolina State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors. Consumer Awareness
8
United States Environmental Protection Agency. Regulatory Updates: Section 608 Refrigerant Management Regulations
9
United States Environmental Protection Agency. Renovation, Repair and Painting Program: Contractors