Maine Plumbing License Requirements
Yes. Maine licenses plumbers through the Maine Plumbers' Examining Board (OPOR). It issues apprentice, journeyman, master and contractor credentials. A journeyman license takes 4,000 hours of work experience.
State plumber license · By BrazeJobs Team · Updated
License tiers
| Apprentice | Trainee |
| Journeyman | State license (plus Journeyman-in-Training, 4-year one-time license) |
| Master | State license (1 year / 2,000 hours as journeyman) |
| Contractor | Master |
Requirements
| Journeyman experience | 4,000 over 2 years as licensed trainee |
| Exam | State exam (70%) |
| Renewal | 2 years |
| Local license | No (state license covers) |
| Board | Maine Plumbers' Examining Board (OPOR) |
Licensed in another state or the military
| Military experience credit | Yes: military training and experience considered for exam eligibility and licensure |
| Military spouses | Spouses moving on military orders may get a license under SCRA; temporary license for active or recently separated military or spouse while applying |
Veterans and Gold Star spouses get processing priority.
- Source: maine.gov · checked November 6, 2026
Apprenticeship
| Registering agency | State Apprenticeship Agency (Maine DOL Apprenticeship Program) |
- Source: apprenticeship.gov · checked November 6, 2026
- Source: maine.gov · checked November 6, 2026
Plumbing code
| Code in force | 2021 UPC with state amendments |
Plumbers' Examining Board Chapter 4, effective Jan 1, 2022.
- Source: maine.gov · checked November 5, 2026