Contractor licensing

New Hampshire contractor license requirements

New Hampshire does not license general or home improvement contractors at the state level. Electricians, plumbers, and gas fitters are licensed through the Office of Professional Licensure and Certification (OPLC), and building permits are handled by each town.

A contractor and plan reviewer discuss drawings and permit paperwork across an office desk.
Keep plans, permit requirements and approvals together when preparing construction work. AI-generated illustration.

New Hampshire has no statewide general contractor license. The state Attorney General's office has said it plainly in its consumer alerts: in New Hampshire, contractors do not need to be licensed. That covers general contractors, remodelers, and most finish trades. The work that does need a state license is the regulated trade work: electrical, plumbing, gas fitting, and a few others such as asbestos and lead abatement, septic, and well pump work, which the Attorney General lists among the jobs contractors cannot legally do without a license.

New Hampshire contractor licensing at a glance
RuleNew Hampshire requirement
Statewide general contractor licenseNone
Home improvement contractor licenseNone at the state level
Licensing agency for tradesOffice of Professional Licensure and Certification (OPLC)
ElectricalElectricians' Board: license required to work with 30 volts or higher
Plumbing and gasMechanical Safety and Licensing Board: plumbers, fuel gas fitters, and related licenses
Other licensed workAsbestos and lead abatement, septic, and well pump work need their own licenses
Building permitsIssued by the town or city where the work is
License lookupNew Hampshire Online Verification at forms.nh.gov/licenseverification

What no state license means in practice

No license does not mean no rules. A general contractor in New Hampshire still registers the business, carries insurance, pulls permits, and follows the state's consumer protection law. The Attorney General's office lists home improvement scams among the most common complaints it receives, and consumers report contractors taking deposits without doing the work. Misrepresenting your business to a homeowner is a consumer protection problem. If you are not licensed, do not say you are. If you are insured, be ready to prove it.

The Attorney General's consumer guidance also shows what homeowners are told to look for, which tells you what to put in your own paperwork. Homeowners are warned about contractors who ask for a down payment over 50 percent of the final cost, who want full payment before the job is done, who only take cash or app payments, or whose proposals lack detail. They are told to get at least three written, itemized estimates, ask for references, and ask for proof of insurance. A remodeler in Manchester who hands over a detailed written scope, a reasonable deposit schedule, and a current certificate of insurance up front answers every one of those concerns before the homeowner asks.

Licensed trades through the OPLC

Electricians

The Electricians' Board licenses apprentices, journeymen, masters, and high and medium voltage electricians, and it also licenses business entities such as corporations, LLCs, and partnerships. An active New Hampshire electrician license is required to work with 30 volts or higher. Journeyman and master licensees must show 15 hours of instruction on changes to the latest National Electrical Code every code cycle, with at least 1 of those hours covering RSA 319-C, the board rules, and installation concerns. Reciprocity applicants need one year of professional experience in the license category sought.

Plumbers and gas fitters

The Mechanical Safety and Licensing Board covers plumbers (trainee, journeyman, master), fuel gas fitters (trainee, installation, service, piping, domestic appliance, hearth system installation and service), voluntary oil heating technicians, and business entities. The board updated to the 2021 codes effective July 1, 2024. For inspections or safety concerns, the board refers people to the Department of Safety.

For a general contractor, the practical rule is simple. Every electrical and plumbing subcontractor on your job needs the right OPLC license, and you should check it before the sub starts. The Attorney General's office tells homeowners to be wary of any contractor who says they can do electrical, plumbing, septic, well pump, or abatement work without a license, so expect owners to ask.

Local permits and business basics

Building permits and inspections run through the town or city. Requirements, fees, and inspection steps differ from Nashua to Portsmouth to a small town with a part-time building inspector, so call the building department before you price the job. The residential permit guide covers the general process.

  • Register the business with the New Hampshire Secretary of State if you operate as an LLC or corporation, or use a trade name.
  • Carry workers' compensation if you have employees, and confirm current requirements with the New Hampshire Department of Labor.
  • Carry general liability insurance. The state does not require it for a license, but homeowners and general contractors will ask for proof.
  • Verify trade licenses for every electrical, plumbing, and gas sub through the OPLC verification tools.

Working across the border changes the picture. Neighboring states set their own rules, so check the Massachusetts, Maine, and Vermont pages before you take work there. On collections, the New Hampshire mechanics lien page explains your lien rights.

Frequently asked questions

Do you need a contractor license in New Hampshire?

Not for general contracting or home improvement work. The New Hampshire Attorney General's office states that contractors do not need to be licensed. Electricians, plumbers, gas fitters, and some specialty trades do need state licenses.

How do I look up a contractor license in New Hampshire?

Use the OPLC license lookup. Electricians and many other professions are searchable through New Hampshire Online Verification at forms.nh.gov/licenseverification, and the Mechanical Safety and Licensing Board links its own license lookup for plumbers and gas fitters.

Can a New Hampshire general contractor do electrical work?

Only with an electrician license. An active New Hampshire electrician license is required to work with 30 volts or higher, so electrical scope goes to a licensed electrician or electrical business.

Does New Hampshire have a home improvement contractor registration?

No state home improvement contractor license or registration was found on the official sources checked. Towns handle permits, and consumer protection law covers how contractors deal with homeowners. Check with the OPLC and your town for any recent changes.

Sources

  1. NH Office of Professional Licensure and Certification: Electricians' Board
  2. NH Office of Professional Licensure and Certification: Mechanical Safety and Licensing Board
  3. NH Office of Professional Licensure and Certification: License Lookup
  4. State of New Hampshire: Online License Verification
  5. New Hampshire Department of Justice: Consumer alert on home improvement scams (March 10, 2022), archived copy

Laws and rates change. Confirm current requirements with the state agency before you bid, file, or pay. This page is general information, not legal advice.

Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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