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§ NH Office of Professional Licensure and Certification
Contractor licensing

New Hampshire

New Hampshire does not have a broad statewide general contractor license for ordinary residential building. Homeowners usually need to verify specific regulated trades through the Office of Professional Licensure and Certification and then rely on local permit offices to confirm any local requirements for general contractors or remodelers.

Verify a license at Office of Professional Licensure and Certification ↗ New Hampshire permits
§ 01

How it works

The New Hampshire licensing system in plain English

New Hampshire's system is narrower than a full statewide contractor board. Trade professionals may be licensed through state channels, but general builders are often governed more by local permitting and business compliance than by one statewide GC credential. For homeowners, the practical result is a layered process: verify trades through the state, and verify the contractor's authority to work through the municipality or town where the property sits. That becomes especially important in areas with active local code enforcement.
§ 03

What to verify

Before you sign anything

Use the OPLC portal to confirm any state-regulated trade licenses tied to the project. Then contact the local building or code office to ask whether your town or city requires any local registration, insurance filing, or contractor approval for the general contractor. Match the contract's legal business name to whatever official record you find. If the contractor works across the Maine or Massachusetts border, make sure you are checking New Hampshire-specific compliance rather than out-of-state credentials.
§ 04

Homeowner tips

Practical guidance for New Hampshire

  1. 01
    Small-town permitting practices vary in New Hampshire, so call the local office for your address instead of assuming a statewide answer.
  2. 02
    For septic, electrical, and heating work, verify the trade credentials directly even if the general contractor seems established.
  3. 03
    If the contractor says no state license is required, ask what local approvals still apply to your town.
  4. 04
    Use the exact property municipality during verification; neighboring towns can have very different expectations.
  5. 05
    Border-state contractors are common in New Hampshire, so verify they can lawfully work there before signing.
§ 05

Frequently asked

New Hampshire-specific licensing questions

01 Does New Hampshire require general contractors to be licensed statewide? ▸
No. New Hampshire has no statewide general contractor license or registration requirement. Requirements for residential and commercial general contractors are set at the local level — by cities, towns, and counties. The New Hampshire Consumer Protection Act (RSA 358-A:2) provides the primary statewide consumer remedy for homeowners dealing with contractor fraud or deceptive practices, administered by the New Hampshire Attorney General's Consumer Protection Bureau.
02 How do I verify a contractor is legitimate in New Hampshire without a state license to check? ▸
Confirm the contractor is registered with the New Hampshire Secretary of State at sos.nh.gov. Ask whether they pull permits in your local jurisdiction — permit history is your best proxy for legitimacy in a state without a GC license. Request current certificates of general liability insurance and workers' compensation and verify both directly with the issuing insurers. Check the Better Business Bureau and ask for references from recent New Hampshire projects.
03 Are specialty trade contractors licensed in New Hampshire? ▸
Yes. Electrical contractors and master/journeyman electricians are licensed through the New Hampshire Office of Licensed Tradesman (OLT) under RSA 319-C — verify at olt.nh.gov. Plumbers are licensed through the same OLT under RSA 329-A. HVAC and mechanical contractors performing certain work may also require OLT licensing. Always verify specialty trade license status at olt.nh.gov before hiring any tradespeople for your project.
04 Does my city or county require contractors to be licensed in New Hampshire? ▸
Some do. Manchester and Nashua have contractor registration or licensing requirements through their respective building departments. Concord's building department may also have local requirements — contact them at concordnh.gov. Many smaller New Hampshire towns have minimal local licensing requirements but do require permits and inspections for substantial projects. Always contact your local building official before hiring to understand what local verification is available.
05 What insurance should I require from a contractor in New Hampshire? ▸
Require general liability insurance and workers' compensation insurance. New Hampshire requires workers' compensation for employers with one or more employees under RSA 281-A. Without a statewide contractor licensing board, insurance verification falls entirely on you — request certificates of insurance and verify the policies are active and adequate with the insurer directly. For larger projects, request to be named as an additional insured on the general liability policy.
06 Is a written contract required for home improvement work in New Hampshire? ▸
New Hampshire has no specific home improvement contract statute requiring written contracts for general contractors. General contract law and the New Hampshire Consumer Protection Act (RSA 358-A:2) apply to contractor relationships and prohibit deceptive practices. Always insist on a detailed written contract for any project — it should describe the scope of work, materials, total price and payment schedule, start and completion dates, and include a clause requiring lien waivers at each payment milestone.
07 What recourse do I have if a contractor does poor work or abandons my project in New Hampshire? ▸
File a complaint with the New Hampshire Attorney General's Consumer Protection Bureau under RSA 358-A at doj.nh.gov. The AG can seek civil penalties up to $10,000 per violation and restitution for consumers harmed by deceptive contractor practices. You may also file in New Hampshire small claims court (up to $10,000) or Superior Court for larger claims. If the contractor took a deposit and abandoned the project, this may also constitute criminal theft — contact local law enforcement.
08 Where do I find contractor requirements for my city or county in New Hampshire? ▸
Contact your local building department directly. Manchester's building inspections are at manchesternh.gov; Nashua's building division is at nashuanh.gov; Concord's building permits are at concordnh.gov; Portsmouth's building and inspections department is at portsmouthnh.gov. For smaller towns, contact your town clerk or selectmen's office. New Hampshire has no central directory of local contractor licensing requirements.
09 How do mechanic's liens work in New Hampshire and how can I protect myself? ▸
Under RSA §447:2 et seq., a contractor, subcontractor, or material supplier who is not paid can file a mechanic's lien against your property. In New Hampshire, a lien must be filed in Superior Court within 120 days of the last work or materials furnished. A sub or supplier the GC failed to pay can lien your home even if you paid the GC in full. Protect yourself by requiring signed lien waivers from the general contractor and all major subs and suppliers at each payment milestone.
state New Hampshire agency Office of Professional Licensure and Certification tier 2
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Office of Professional Licensure and Certification is the official source for contractor licensing information in New Hampshire. Always verify a contractor's license before hiring. Jaspector is not affiliated with Office of Professional Licensure and Certification; this page is informational guidance only.