Overview
New Hampshire takes a narrow approach to contractor regulation. There is no statewide general contractor or home improvement contractor license, so a remodeler, framer, or builder can run a residential or commercial job without a state credential tied to the job itself. What the state does license is the skilled trades where safety is on the line: electrical and plumbing work carry mandatory state licenses, administered through the Office of Professional Licensure and Certification in Concord. Everything outside those licensed trades falls to local rules and general business law. That split is the single most important thing to understand before you bid a job here. Get the trade licenses right, register your business with the state, and check what your specific town or city expects.
Trades Licensed At The State Level
Two trades dominate the state licensing picture. Electricians answer to the Electricians' Board: any work at 30 volts or higher requires an active New Hampshire electrician license, and apprentices must register and work under the supervision of a master electrician. Plumbers fall under the Mechanical Safety and Licensing Board, which issues Master, Journeyman, and Apprentice credentials and ties renewal to ongoing code education. The OPLC also oversees related mechanical trades such as fuel gas fitting through that same board. Each license carries its own exam, experience path, and renewal cycle, so a tradesperson moving into New Hampshire should start with the board that matches their craft rather than hunting for a single all-purpose contractor card. License lookup tools on the OPLC site let you verify any credential before you hire or subcontract.
Why There Is No General Contractor License
General contracting in New Hampshire sits outside the state professional licensing system entirely. The chapter of state law that defines OPLC's regulated occupations covers engineers, architects, land surveyors, home inspectors, and similar professions, but it does not name general or home improvement contractors. That means the accountability for a remodel or new build runs through other channels: your contract, your insurance, consumer protection law, and the building permit and inspection process at the municipal level. Towns and cities can impose their own registration, permit, or inspection requirements, and many require permits even where they ask for no contractor registration. Before you sign a contract, register your business with the Secretary of State, carry workers' compensation if you have employees, and call the building department in the jurisdiction where the work will happen.
The Electrician Licensing Ladder, Step By Step
Electrical work is where New Hampshire draws its sharpest line. Any work on systems carrying 30 volts or more requires an active state electrician license, and the Electricians' Board runs a three-rung ladder to get there. You start as a registered apprentice, which calls for a high school diploma or equivalent and 30 hours of classroom instruction each year before the ID card renews. The journeyman rung is the heavy lift: four years of full-time work, or 8,000 hours logged within six years, paired with at least 560 hours of classroom instruction through an approved apprenticeship program. Pass the journeyman exam and you can work unsupervised. The master rung adds a minimum of 2,000 hours of on-the-job experience as a licensed journeyman, certified by each employer, before you sit the master exam and gain the authority to pull permits and run crews. Renewal is not passive. Every code cycle, journeymen and masters must show 15 hours of instruction on changes to the latest NFPA 70 National Electrical Code, including at least one hour on changes to RSA 319-C. Track your apprentice hours from day one through the board's electrician applications page, because undocumented time rarely counts later.
Plumbing And Gas Fitting Under The Mechanical Board
Pipes and fuel gas answer to a different authority: the Mechanical Safety and Licensing Board. It licenses plumbers at trainee, journeyman, and master levels, and fuel gas fitters at the trainee and full installation-service levels. The journeyman plumber path mirrors the electrical trade in structure. You register as an apprentice, file an apprenticeship agreement with every new employer so your hours actually count, and complete an approved program built around four years of full-time work and roughly 560 hours of instruction before sitting the journeyman exam. Master plumber comes next, requiring documented experience as a licensed journeyman plus a separate master examination that tests code mastery and supervisory knowledge. Fuel gas fitting runs as its own track because gas carries its own hazards, with trainee registration feeding into installation and service licensure. Continuing education is lighter here than on the electrical side: every licensee above the trainee and apprentice tiers shows three hours of code update annually, totaling six hours across the two-year renewal cycle. Application checklists, exam candidate bulletins, and the governing rules all live on the Mechanical Safety and Licensing Board page. Skip the apprenticeship agreement and you risk redoing years of logged time.
What General Contractors Actually Need Here
No state card exists for general contractors in New Hampshire, but that absence is not a free pass. The real obligations sit in three places. First, registration: anyone running a business in the state files with the Secretary of State, and a basic registration runs $100. Second, local permitting: building permits, inspections, and any town-level contractor registration are handled by the municipality where the work happens, and requirements vary widely from Manchester to a small lakes-region town. Call the local building department before the first nail goes in. Third, the trades you cannot self-perform: the moment a job touches electrical above 30 volts, plumbing, or gas, that scope must go to an OPLC-licensed tradesperson, full stop. Beyond the legal minimum, the market expects general liability insurance, workers' compensation if you carry employees, and a written contract for residential work. None of those are issued by a licensing board, yet skipping them is how reputable builders lose clients and lawsuits. The smart move is to treat the missing GC license not as one fewer hurdle but as a signal to over-document everything else, because the state will not vouch for your competence the way a license would.
How To Verify A License And Protect The Job
Because no statewide GC license exists, the burden of vetting falls on whoever hires the contractor. For any licensed trade, that vetting is straightforward. The OPLC publishes a free License Lookup tool that returns a tradesperson's license type, status, and expiration in seconds, and the agency's status definitions page explains exactly what active, lapsed, or suspended means. Run that search before electrical, plumbing, or gas work begins, and confirm the name on the license matches the person on site rather than a distant license holder lending a number. General contracting work cannot be verified this way because there is nothing to look up, so judgment has to come from elsewhere: proof of general liability insurance, references from recent local jobs, a signed written contract, and lien-waiver discipline on payments. New Hampshire's consumer protection statute, RSA 358-A, governs unfair and deceptive business practices and gives homeowners a path to the Attorney General's Consumer Protection Bureau when a job goes wrong. Document everything from the first estimate. The paper trail you build at the start is the leverage you hold if the relationship sours later.
Frequently Asked Questions
Do I need a state license to work as a general contractor in New Hampshire? No. New Hampshire issues no statewide general or home improvement contractor license. You can perform general contracting work without a state contractor credential, though local permits and registration may still apply.
Which trades require a state license? Electricians and plumbers are the core licensed trades, regulated by the Electricians' Board and the Mechanical Safety and Licensing Board. Related mechanical trades such as fuel gas fitting are also licensed through OPLC.
When does electrical work require a license? Any work at 30 volts or higher requires an active New Hampshire electrician license. Apprentices must register with OPLC and work under a master electrician's supervision.
Who regulates these licenses? The Office of Professional Licensure and Certification, based in Concord, administers the trade boards, processes applications, and runs the public license lookup.
What should I do if my town has its own rules? Contact the local building department directly before bidding. Confirm permit requirements, inspections, and any municipal contractor registration, then register your business with the Secretary of State and carry the right insurance.
Do I need a license to do electrical work under 30 volts in New Hampshire? No. The state license requirement attaches to systems carrying 30 volts or more. Low-voltage work below that threshold falls outside the Electricians' Board mandate, though local rules and manufacturer requirements can still apply.
How long does it take to become a master electrician in New Hampshire? Plan on years, not months. You first complete the journeyman path, four years or 8,000 hours plus 560 classroom hours, then add at least 2,000 hours of certified work as a licensed journeyman before sitting the master exam. Six years from a standing start is a realistic floor.
Can a general contractor in New Hampshire install their own plumbing or gas lines? Only if they personally hold the matching OPLC license. The lack of a GC license does not extend to the regulated trades. Plumbing and gas fitting must be performed by someone licensed through the Mechanical Safety and Licensing Board, regardless of who runs the overall project.
Where do I report a contractor who took my money and disappeared? New Hampshire's consumer protection law, RSA 358-A, covers deceptive business practices, and complaints go to the Attorney General's Consumer Protection Bureau. For licensed trades, you can also file a complaint with the OPLC, which can investigate and discipline the license holder.
Editor’s Note
One practical tip for anyone reading job postings or marketing that promises a New Hampshire contractor license: treat it with skepticism. There is no such statewide credential to hand out. When you see a license number on a New Hampshire tradesperson's materials, it points to a specific trade board, usually electrical or plumbing, and you can verify it through the OPLC license lookup in under a minute. That habit protects homeowners and general contractors alike from subs who are not actually licensed for the work they are quoting.