New Hampshire HVAC License Lookup — Verify Any Contractor

Where to Verify a New Hampshire HVAC License

If you are a homeowner hiring a contractor or a general contractor vetting a subcontractor, the fastest way to confirm someone's mechanical trade credentials in New Hampshire is through the OPLC's online license verification portal. The Office of Professional Licensure and Certification maintains the official database for all state-issued mechanical licenses, including fuel gas fitters, plumbers, oil heating technicians, and domestic appliance technicians.

The portal lets you search by the individual's name or license number. The public record identifies the license type, license number, and current status. For disciplinary history, check the OPLC's Board Actions pages separately. Business entity licenses are searchable too — if someone tells you they operate under an LLC, you can confirm that the business itself holds an active Mechanical Business Entity license and separately verify its designated qualifying licensee.

What the Results Actually Mean

A few things that catch people off guard when they run a lookup:

No result does not always mean unlicensed. New Hampshire does not issue a general HVAC license. If a contractor only installs air conditioning and refrigeration equipment without touching fuel gas lines, they are not required to hold an OPLC mechanical license at all. Their credentials would be a federal EPA Section 608 certification (which is not in the OPLC database) and potentially a local electrical or mechanical permit for the project. The OPLC lookup only covers fuel gas fitting, plumbing, oil heating, and domestic appliance licenses.

"Expired" is not the same as "revoked." License renewal cycles in New Hampshire run on a two-year period. An expired license means the individual has not renewed and is not currently authorized to perform regulated mechanical work until it is renewed or reinstated. The key distinction is between expired (lapsed, potentially reinstatable) and revoked or suspended (a disciplinary action by the Mechanical Licensing Board). If you see a revoked or suspended status, that contractor should not be performing any regulated mechanical work.

Business entity status matters separately. Even if an individual's personal gas fitter license is active, they cannot legally pull permits or contract under a business name unless the business itself holds a current Mechanical Business Entity license. The entity license requires a designated qualifying license holder and active commercial general liability insurance. Search for both the person and the company.

When the OPLC Database Is Not Enough

Three situations where you need to look beyond the OPLC portal:

Municipal permit requirements — cities like Manchester and Nashua maintain their own building departments and permit processes. A state license does not replace the local permit. Contact the municipality's building or code enforcement office directly.

State Fire Marshal inspections — for work in unincorporated areas or towns without a local code enforcement office, the New Hampshire Division of Fire Safety handles building permits and inspections. If a contractor claims to have done permitted work in one of these areas, the Fire Marshal's Office is the verifying authority, not the OPLC.

EPA Section 608 certification — for refrigerant handling, the EPA issues the credential directly. There is no state-level database for this. Ask the contractor to show documentation of their EPA certification type (Type I, II, III, or Universal).

Protecting Yourself as a Homeowner

Before hiring any HVAC contractor in New Hampshire, run the OPLC lookup on both the individual and their business entity. Ask for their license number upfront — a licensed contractor will have it ready. Confirm that their insurance certificates are current, and check with your municipality's building department for the permit and inspection requirements for the project.

If you are a contractor trying to understand what credentials you actually need and how the OPLC licensing ladder works, the New Hampshire HVAC License Guide lays out the full sequence from trainee registration through business entity formation, including the examination-first rule and the CE Broker tracking mandate.

See more New Hampshire guides →