California to Maine: master plumber license reciprocity
Maine has no reciprocity agreement with California. A California master plumber applies by endorsement.
Reference only, not legal advice. Rules change; confirm with the licensing board before you apply. Full disclaimer.
Licensure by endorsement (32 M.R.S. §3501-C); examination if origin requirements are not substantially equivalent
The board reviews your out-of-state credentials case by case. Some exam is usually still required, often only a law or code exam.
There is no Maine-published list of master-plumber reciprocity agreements. The inbound default is licensure by endorsement under 32 M.R.S. §3501-C and 10 M.R.S. §8003-H: hold a substantially equivalent master-level license in another U.S. jurisdiction, be in good standing everywhere licensed, and pay the fee. Chapter 49 does not require a Maine trade or jurisprudence exam on that path. If the origin license is not substantially equivalent, or if the board has not yet implemented endorsement for the master grade, the applicant uses §3501(2-A): application, §3501-B fee, 2,000 hours as a journeyman or 8,000 hours as a trainee under a master (or the equivalent), and a passing grade on the master's examination. Out-of-state master or journeyman hours may be offered as 'the equivalent.' Contracting in Maine still requires a person who holds this master license (or employs one) to supervise any trainee; this file does not separately model a plumbing-contractor registration because chapter 49 licenses individuals.
Same gaps as journeyman: fee amounts, SBI background-check fee, exam vendor/pass mark/sitting fee, existence of a board endorsement rule, any reciprocity partners, CE, timeline. Maine's master experience floor (2,000 hours as a journeyman, or 8,000 as a trainee) is lower than many states' master thresholds, so a bona fide out-of-state master license will often be substantially equivalent on hours even if the board has not published an equivalence chart. examTradeRequired is false for endorsement; the Maine master exam is required on the §3501(2-A) examination route.
At a glance
- Trade exam
- Waived
- Law / code exam
- Not required
- Out-of-state hours
- Count toward eligibility
What you must already have
- Your California license must be active and in good standing.
- You must have no disciplinary action or unresolved complaints on your record.
- Origin jurisdiction's master requirements must be substantially equivalent to Maine's (10 M.R.S. §8003-H). Maine's own exam pathway is 2,000 hours as a journeyman plumber or 8,000 hours as a trainee under a master, or the equivalent, plus a passing grade on the master's examination (32 M.R.S. §3501(2-A)).
- You must document at least 2,000 hours of qualifying work experience.Statutory exam-route minimum as a journeyman plumber (one year / 2,000 hours), or alternatively 8,000 hours as a trainee plumber under a master, or the equivalent. Endorsement applicants meet this only insofar as the origin pathway is substantially equivalent.
What you'll do to get licensed in Maine
- 1Application fee. Pay the application fee. Fee set under 32 M.R.S. §3501-B (and OPOR 02-041 CMR ch. 10). Statute opened: fees by rule, not to exceed $350 biennially..
- 2License fee. Pay the license or certificate fee. Master Plumber license fee under 32 M.R.S. §3501-B..
- 3Other. Sworn application on a form prescribed by the board, with proof of the valid, active out-of-state master license (license verification from the issuing board).
- 4Trade exam. Pass the destination's trade exam (if applicable). Board-approved master plumber examination with a passing grade determined by the board (32 M.R.S. §3501(1-A), (2-A)) — required only if endorsement under §3501-C is not available..
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 · if applicable
How Maine licenses master plumbers
Maine master plumber · “Master Plumber”
Statewide license
Maine issues a statewide Master Plumber license through the same Plumbers' Examining Board. By examination the applicant pays the §3501-B fee and shows either one year / 2,000 hours as a journeyman plumber or four years / 8,000 hours as a trainee plumber under a master (or the equivalent), then obtains a passing grade on the board-approved master's examination (32 M.R.S. §3501(2-A)). A Maine master may supervise trainee plumbers; the trainee license itself is issued without examination to a person employed by a licensed master. Out-of-state masters use the same statutory endorsement process as journeymen (32 M.R.S. §3501-C / 10 M.R.S. §8003-H) when the origin master requirements are substantially equivalent; otherwise they sit the Maine master exam with comparable hours credited. Board applications, fees, exam bulletin and CE rules were not reachable (PFR 404).
Common questions
- Do I have to take the Maine master plumber exam if I'm licensed in California?
- No. The trade exam is waived on this path.
- Do my California work hours count in Maine?
- Yes. Documented out-of-state experience counts toward Maine's eligibility requirements.
- Does it work the other way, from Maine to California?
- Not necessarily. Reciprocity is directed. Going from Maine to California, the mechanism is experience credit.
Sources
- Maine Plumbers' Examining Board (Office of Professional and Occupational Regulation) - expected board home · Maine Office of Professional and Occupational Regulation (OPOR), Department of Professional and Financial Regulation · Agency Page · verified September 16, 2026
- Maine Office of Professional and Occupational Regulation - Professions and Boards · Maine Office of Professional and Occupational Regulation (OPOR) · Agency Page · verified September 16, 2026
- 10 M.R.S. §8003-H - Licensure by endorsement (OPOR general provision) · 10 M.R.S. §8003-H · Maine Legislature, Office of the Revisor of Statutes · Statute · verified September 16, 2026
- 32 M.R.S. §3501 - Issuance of licenses (journeyman, master, journeyman-in-training, trainee) · 32 M.R.S. §3501 · Maine Legislature, Office of the Revisor of Statutes · Statute · verified September 16, 2026
- 32 M.R.S. §3501-B - Fees (Plumbers' Examining Board) · 32 M.R.S. §3501-B · Maine Legislature, Office of the Revisor of Statutes · Statute · verified September 16, 2026
- 32 M.R.S. §3501-C - Licensure by endorsement (Plumbers' Examining Board) · 32 M.R.S. §3501-C; PL 2021, c. 642, §16 · Maine Legislature, Office of the Revisor of Statutes · Statute · verified September 16, 2026
- 32 M.R.S. Chapter 49 - Plumbers (table of contents) · 32 M.R.S. ch. 49 · Maine Legislature, Office of the Revisor of Statutes · Statute · verified September 16, 2026
Verified dates are when a person last opened each source and confirmed the facts above. Cite the board, not us.