New Hampshire renewal guide
Master Plumber License
If this license is up for renewal, this page gives you the fee, the timeline, and the items that usually hold the filing up.
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Start here
What matters before you file.
Check the fee, the renewal window, and the documents or insurance records that can slow approval down.
Issuing authority
Renewal period
Every 24 months
Renewal fee
$330.00
Bond requirement
No
Insurance requirement
No
Continuing education
6 hours
Last verified
Oct 2026
Before you renew
Get the filing straight.
- 1
Finish the CE first
Complete the 6 required hours before you start the renewal.
- 2
File with the board
File through New Hampshire Mechanical Safety and Licensing Board (OPLC) and pay the $330.00 renewal fee once the supporting proof is ready.
Renew online - 3
Leave room for processing
Typical processing time is 30 days, so do not wait until the last minute.
Detailed notes
The fine print is here.
New Hampshire Master Plumber License
The New Hampshire Mechanical Safety and Licensing Board, under the Office of Professional Licensure and Certification (OPLC), issues the Master Plumber license under RSA 153:27-a through 153:29.
Examination and Experience Requirements
Under Mec 305.01, applicants must have held a New Hampshire journeyman plumber license for at least 6 months and pass the master plumber examination with a score of at least 75%.
Fees
- License Fee: $330 for a 2-year license — the same fee covers initial licensure, renewal, and reinstatement after expiration (Plc 1002.25)
- Exam Fee: $90 (Plc 1004.11 master plumber examination)
Continuing Education
Master Plumbers must complete 6 hours of continuing education per 2-year cycle for each endorsement, taken as two separate board-approved 3-hour code update sessions; the same session cannot count twice (Mec 404.01, 404.03).
Renewal Process
- Renewal Period: Every 2 years; the license expires on the last day of the month it was issued (Mec 402.01)
- Renewal Fee: $330
- Deadline: File on or before expiration. An expired license does not authorize you to practice until it is reinstated (RSA 310:8, III)
- Expired Under 1 Year: Reinstate through the renewal process at the same $330 fee (Mec 405.01; Plc 1001.13); there is no separate late fee
- Expired Over 1 Year: You must apply for initial licensure again (Mec 405.01)
Consequences of Operating Without a License
RSA 153 no longer has its own licensing penalty section (RSA 153:37 was repealed in 2023). Unlicensed practice is unlawful practice under RSA 310:13 — after notice and a hearing the board may fine up to $10,000 for each offense, or the gain from the violation if greater, and may seek an injunction.
*Disclaimer: This information is provided for general reference only and does not constitute legal advice. Always verify current requirements directly with the NH OPLC Mechanical Safety and Licensing Board.*
Official links
Check the board or agency directly.
Required documents
- exam_results
- proof_of_experience
- government_issued_id
Source notes
NH Office of Professional Licensure and Certification — Mechanical Safety and Licensing Board . https://www.oplc.nh.gov/license-fees-mechanical-safety-and-licensing-board-0 Re-verified 2026-09 against https://gc.nh.gov/rules/state_agencies/plc1000.html, https://gc.nh.gov/rules/state_agencies/mec300.html, https://gc.nh.gov/rules/state_agencies/mec400.html, https://gc.nh.gov/rsa/html/XII/153/153-mrg.htm, https://gc.nh.gov/rsa/html/XXX/310/310-mrg.htm. 2026-09-28: lateGracePeriodDays cleared (365). That window is the post-expiration late-renewal/reinstatement period, during which the credential is expired and may not be used until reinstated (RSA 310:8 III); it is not a penalty-free grace period, so it stays in prose only.
Rules move. Check New Hampshire Mechanical Safety and Licensing Board (OPLC) again before you pay, renew, or schedule work around this requirement.
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