Do I have to take the New Hampshire journeyman plumber exam if I'm licensed in Oklahoma?

Yes. New Hampshire requires the trade exam on this path.

What does it cost to get a New Hampshire journeyman plumber license from Oklahoma?

Published fees on this path total $198, not counting exam vendor fees or bonds.

Do my Oklahoma work hours count in New Hampshire?

Yes. Documented out-of-state experience counts toward New Hampshire's eligibility requirements.

Does it work the other way, from New Hampshire to Oklahoma?

Not necessarily. Reciprocity is directed. Going from New Hampshire to Oklahoma, the mechanism is endorsement.

Oklahoma to New Hampshire: journeyman plumber license reciprocity

Experience credit· Hours transferVerified September 23, 2026· 9 sources

New Hampshire has no reciprocity agreement with Oklahoma. Your Oklahoma experience counts toward eligibility, but you must pass the New Hampshire exam.

Reference only, not legal advice. Rules change; confirm with the licensing board before you apply. Full disclaimer.

Traditional application and New Hampshire plumbing examination (non-qualifying jurisdictions)

Nothing is waived, but your documented out-of-state hours count toward eligibility to sit the exam.

An out-of-state journeyman whose origin is not on OPLC's Plc 313.34 qualifying-jurisdiction list cannot use endorsement and applies through the traditional Mechanical Licensing Board process. Under Mec 302.12 and Mec 305.01(b)(4), proof of journeyman plumber licensure in another state or jurisdiction that licenses plumbers makes the applicant eligible for the New Hampshire journeyman exam in place of the New Hampshire apprenticeship, 600 hours of education and 8,000 hours of experience; the exam itself is not waived and must be passed with at least 70 percent. After passing, the applicant mails the paper application with the $198 two-year journeyman plumber fee (Plc 1002.25). Plc 313.11 lets an individual from a non-listed jurisdiction request a waiver of endorsement criteria based on education, training and experience, and OPLC's reciprocity FAQs allow a written request under Plc 210.03 to reconsider whether a jurisdiction is substantially similar.

Journeymen licensed in one of the 34 jurisdictions OPLC lists for journeyman plumber under Plc 313.34 on its New Changes for Reciprocity page may apply by endorsement instead, without the New Hampshire exam, provided the license is active and unencumbered.

At a glance

Trade exam: Required
Law / code exam: Not required
Out-of-state hours: Count toward eligibility

What you must already have

Your Oklahoma license must be active and in good standing.
At least 18 years old (Mec 302.02). The board may deny an application for fraud, disqualifying criminal convictions, or a similar license suspended or revoked in another jurisdiction and not reinstated (Mec 304.01(f)).

What you'll do to get licensed in New Hampshire

1Trade exam. Pass the destination's trade exam. New Hampshire journeyman plumber licensing examination (Mechanical Licensing Board; Prov candidate bulletin is linked from the board home page)..
2Application fee. Pay the application fee ($198). Journeyman plumber application / two-year license fee (Plc 1002.25 and OPLC Mechanical Safety and Licensing Board fee table)..
3Other. Demonstrate proof of origin-state plumber licensure with the application (Mec 302.12)..

Published fees on this path total $198, excluding exam-vendor fees, bonds, and insurance.

What you'll need to buy or arrange

Exam preparation

Most boards contract PSI, Prov, or ICC for exams. Check which code edition the exam is written to before buying a prep course.

Trade exam

How New Hampshire licenses journeyman plumbers

New Hampshire journeyman plumber · “Journeyman Plumber”

Statewide license

Verified September 23, 2026· 9 sources

Issued by New Hampshire Mechanical Licensing Board, Office of Professional Licensure and Certification (OPLC)

New Hampshire issues a statewide Journeyman Plumber license through the Mechanical Licensing Board in the Office of Professional Licensure and Certification (OPLC). The same board licenses trainee/apprentice plumbers, master plumbers and mechanical business entities, and also regulates fuel gas fitters; it does not license HVAC technicians. The published two-year journeyman plumber fee is $198 (OPLC Mechanical Safety and Licensing Board fee table; Plc 1002.25). Since 3 May 2024, out-of-state journeymen from jurisdictions OPLC has determined substantially similar under RSA 310:17 and Plc 313.34 may be licensed by endorsement without the New Hampshire exam; Plc 313.34 treats a comparable journeyman path as a four-year apprenticeship with 560 instruction hours plus an exam, and the origin code must be the same or a later edition of New Hampshire's building and fire codes. Everyone else uses the traditional route: Mec 302.12 makes an out-of-state plumber license sufficient to sit the New Hampshire plumbing examination (given by Prov); the exam itself is not waived.

Moving to New Hampshire Leaving New Hampshire

Compare: getting a New Hampshire license from scratch

Common questions

Do I have to take the New Hampshire journeyman plumber exam if I'm licensed in Oklahoma?: Yes. New Hampshire requires the trade exam on this path.
What does it cost to get a New Hampshire journeyman plumber license from Oklahoma?: Published fees on this path total $198, not counting exam vendor fees or bonds.
Do my Oklahoma work hours count in New Hampshire?: Yes. Documented out-of-state experience counts toward New Hampshire's eligibility requirements.
Does it work the other way, from New Hampshire to Oklahoma?: Not necessarily. Reciprocity is directed. Going from New Hampshire to Oklahoma, the mechanism is endorsement.

Sources

N.H. Code Admin. R. Mec 300 - Initial fuel gas fitting, plumbing, trainee, apprentice and business entity licensing · Mec 302.02; Mec 302.12; Mec 304.01; Mec 304.04; Mec 305.01; Mec 306.01; Mec 307 · New Hampshire General Court (Administrative Rules) · Admin Rule · verified September 23, 2026
NH OPLC - Mechanical Licensing Board (who we regulate; plumber licenses) · New Hampshire Office of Professional Licensure and Certification (OPLC) · Agency Page · verified September 23, 2026
NH OPLC - License Fees for the Mechanical Licensing Board · New Hampshire Office of Professional Licensure and Certification (OPLC) · Agency Page · verified September 23, 2026
OPLC - Reciprocity Licensing (HB 594 overview) · New Hampshire Office of Professional Licensure and Certification (OPLC) · Agency Page · verified September 16, 2026
NH OPLC - New Changes for Reciprocity in New Hampshire (endorsement qualifying jurisdictions by board) · RSA 310:17; Plc 313.34 · New Hampshire Office of Professional Licensure and Certification (OPLC) · Agency Page · verified September 23, 2026
N.H. Code Admin. R. Plc 1002.25 and Plc 1004.11 - Mechanical Licensing Board licensing and examination fees · Plc 1002.25; Plc 1004.11 · New Hampshire General Court (Administrative Rules) · Admin Rule · verified September 23, 2026
N.H. Code Admin. R. Plc 313.34 - Substantially similar requirements for Mechanical Licensing Board professions · Plc 313.34 (eff. 5-3-24, #13954); Plc 313.01; Plc 313.11 · New Hampshire General Court (Administrative Rules) · Admin Rule · verified September 23, 2026
RSA Chapter 153 - Fire Safety; Mechanical Licensing Board (plumber and fuel gas licensing) · RSA 153:27-a; RSA 153:28; RSA 153:29-a; RSA 153:36, VII · New Hampshire General Court · Statute · verified September 23, 2026
RSA 310:17 License Reciprocity · N.H. Rev. Stat. Ann. 310:17 · New Hampshire General Court · Statute · verified September 17, 2026

Verified dates are when a person last opened each source and confirmed the facts above. Cite the board, not us.

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