How to Verify a Contractor License in New Hampshire

TL;DR — Verifying a Contractor License in New Hampshire in 60 Seconds

New Hampshire does not require a statewide general contractor license. However, electricians and plumbers must be licensed at the state level through the Office of Professional Licensure and Certification (OPLC). To verify a New Hampshire electrician or plumber, search at the OPLC website (oplc.nh.gov) or on LicensedCheck.com. Confirm the license is active and the classification matches your project. For general contractors, HVAC, and roofing, check with local municipalities as requirements vary by town and city.

Best Contractor License Verification Tools for New Hampshire

The New Hampshire Office of Professional Licensure and Certification at oplc.nh.gov provides the official license lookup for electricians and plumbers. The NH Electricians Board licenses master electricians, journeyman electricians, and apprentice electricians. The NH Board of Plumbers licenses master plumbers and journeyman plumbers.

LicensedCheck.com is expanding New Hampshire coverage — check back for OPLC trade license data.

For general contractors, check with local authorities. Manchester, Nashua, Concord, and other New Hampshire cities may have their own contractor registration or licensing requirements. Many smaller New Hampshire towns do not require contractor licensing but do require building permits.

Which New Hampshire Trades Require State Licensing

New Hampshire licenses electricians and plumbers at the state level through OPLC. Electricians include master electrician, journeyman electrician, and apprentice — each with specific examination and experience requirements. Master electricians can pull permits and supervise work. Plumbers include master plumber and journeyman plumber with similar tiered requirements.

General contractors are not licensed at the state level. New Hampshire's tradition of local governance means contractor regulation varies significantly from town to town. Some municipalities require contractor registration while others have no requirements beyond building permits.

HVAC technicians are not licensed at the state level but must hold EPA Section 608 certification for refrigerant handling. Gas fitters (working on gas piping and gas appliances) must be licensed through OPLC. Roofing and other specialty trades are generally unregulated at the state level.

New Hampshire requires building permits for most construction projects through local building departments. Fire sprinkler contractors and alarm installers are licensed at the state level through the Office of the State Fire Marshal.

Protecting Yourself When Hiring in New Hampshire

For electrical and plumbing work, always verify the tradesperson holds the correct New Hampshire license through OPLC. Make sure the license classification matches the scope of work — only master electricians and master plumbers can pull permits and supervise projects.

For general contracting and other trades, focus on insurance and references. Request proof of general liability insurance and workers compensation coverage. New Hampshire requires workers compensation for businesses with employees.

New Hampshire's Home Improvement Contractor Act provides some consumer protections for residential work. Get a written contract for any project that includes scope of work, total price, payment schedule, start and completion dates, and any applicable license numbers.

Watch for red flags: an electrician or plumber without a state license, no proof of insurance, demands for full upfront payment, and reluctance to pull required building permits. New Hampshire's limited state licensing means consumers should be especially diligent about verifying insurance coverage. Check trade credentials on LicensedCheck, verify local requirements with your town or city, and always get multiple written estimates.