New Hampshire Contractor Examination Requirements

Examination requirements for contractors in New Hampshire vary by trade classification, license type, and the governing board or agency overseeing each discipline. Passing a qualifying examination is a mandatory step in the licensure process for electrical, plumbing, HVAC, and certain other specialty trades — while the general construction sector operates under a different regulatory structure. Understanding which examinations apply, who administers them, and what subject matter they cover is essential for any contractor seeking to operate legally within the state.

Definition and scope

Contractor examination requirements in New Hampshire refer to the formal testing standards that applicants must satisfy before a trade license is issued by the relevant state authority. These requirements are established under New Hampshire statutes and administered through the New Hampshire Office of Professional Licensure and Certification (OPLC), which oversees licensing boards for multiple construction trades.

The examination requirement is distinct from other licensing prerequisites such as work experience documentation, proof of insurance, or business registration. It specifically measures technical knowledge and competency in the applicable trade. Examinations are required at the point of initial licensure and are not typically repeated at renewal — though continuing education obligations apply separately, as outlined on the New Hampshire contractor continuing education page.

New Hampshire does not impose a single unified contractor examination. Instead, each trade board sets its own exam standards, and third-party testing providers are often contracted to deliver those exams. The OPLC coordinates licensing administration, but examination content and pass thresholds are set at the board level in accordance with state statutes.

Scope limitations: This page covers examination requirements applicable to contractor licensure under New Hampshire state law. Federal contractor certifications, municipal-level trade endorsements, and voluntary industry credentialing programs fall outside this scope. Requirements for contractors working exclusively on federal properties or projects administered under federal authority are not covered here. For an overview of the broader regulatory framework, see New Hampshire contractor regulatory agencies.

How it works

The examination process follows a structured sequence tied to the licensure application pathway:

1. Trade board identification — The applicant identifies the correct licensing board for their trade (e.g., Electricians' Board, Plumbers' Board, Mechanical Licensing Board) under the OPLC.
2. Application submission — A completed license application is submitted to the OPLC, along with documentation of work experience and applicable fees.
3. Eligibility determination — The relevant board reviews the application to confirm that experience and education prerequisites are met before approving the applicant to sit for examination.
4. Exam registration — Approved applicants register with the authorized testing provider. New Hampshire uses PSI Exams Online for most trade examinations, which administers tests at physical testing centers and, for some categories, via remote proctoring.
5. Examination — The applicant completes the required exam, which typically covers trade theory, state and local code compliance, safety regulations, and applicable statutory requirements.
6. Score reporting — Scores are reported to the OPLC or relevant board. Most examinations require a minimum passing score of 70 percent, though individual boards may set different thresholds.
7. License issuance — Upon passing, the board issues the license, subject to any remaining documentation or fee requirements.

Examination content is generally aligned with current editions of national model codes — such as the National Electrical Code (NEC) for electricians, or the International Plumbing Code (IPC) for plumbers — as adopted and amended by New Hampshire statute.

Common scenarios

Licensed electricians: New Hampshire requires separate examinations for Apprentice Electrician, Journeyman Electrician, and Master Electrician classifications. The Master Electrician exam is the most comprehensive, covering advanced electrical theory, NEC interpretation, load calculations, and state-specific rules. Candidates who fail an examination may retake it after a mandatory waiting period established by the Electricians' Board. Electrical licensing is detailed further on the New Hampshire electrical contractor services page.

Licensed plumbers: The Plumbers' Board administers licensure for Master Plumber and Journeyman Plumber classifications. Examination content covers plumbing code, pipe sizing, fixture requirements, and sanitation standards. New Hampshire adopted the 2021 International Plumbing Code (IPC) as its base plumbing standard, and exam content reflects that edition. More context on plumbing contractor operations appears on the New Hampshire plumbing contractor services page.

HVAC and mechanical contractors: The Mechanical Licensing Board oversees examination requirements for mechanical contractors, which address HVAC system design, refrigerant handling, ductwork, and fuel gas code compliance. Federal Environmental Protection Agency (EPA) Section 608 certification — a federally administered credential for refrigerant handling — is separate from but complementary to state licensure.

Contractors without a state exam requirement: General contractors in New Hampshire are not subject to a state-issued license requiring a trade examination. They operate under a registration framework rather than a licensure system. This structural distinction is covered in detail on the New Hampshire contractor registration vs licensing page.

Decision boundaries

Examination required vs. not required: The determinative factor is trade classification. Licensed trades (electrical, plumbing, mechanical/HVAC) require passage of a board-approved examination. General construction and most specialty subcontractor categories outside those licensed trades do not have a state examination requirement.

Master vs. Journeyman classification: Master-level licenses require higher exam scores and broader subject coverage than Journeyman-level licenses. A Journeyman Electrician may work under supervision but cannot independently pull permits or operate a contracting business — functions reserved for Master license holders.

Reciprocity and out-of-state applicants: New Hampshire maintains limited reciprocity agreements with certain states. Out-of-state applicants may be exempt from re-examination if their home state's exam is deemed equivalent by the relevant board. Specific reciprocity provisions are addressed on the New Hampshire contractor reciprocity agreements page. Applicants who cannot demonstrate reciprocal equivalency must sit for the New Hampshire examination regardless of prior licensure elsewhere.

Examination vs. continuing education: Passing an exam satisfies the initial competency standard. It does not replace or substitute for post-licensure continuing education obligations, which are independently mandated for license renewal by most boards under OPLC administration.

References

• New Hampshire Office of Professional Licensure and Certification (OPLC)
• New Hampshire Electricians' Board – OPLC
• New Hampshire Plumbers' Board – OPLC
• New Hampshire Mechanical Licensing Board – OPLC
• PSI Exams Online – New Hampshire Trades Licensing
• New Hampshire RSA Title XXX – Occupations and Professions
• U.S. EPA Section 608 Certification – Refrigerant Handling
• ICC International Plumbing Code (IPC)