Idaho Plumbing License Requirements
Yes. Idaho licenses plumbers through the Idaho Plumbing Board (DOPL). It issues apprentice, journeyman and contractor credentials. A journeyman license takes 8,000 hours of work experience.
State plumber license · By BrazeJobs Team · Updated
License tiers
| Apprentice | Registration |
| Journeyman | State license |
| Master | No state license |
| Contractor | Plumbing Contractor |
Requirements
| Journeyman experience | 8,000 + 4 years school, or 16,000 |
| Classroom hours | 4 years approved schooling |
| Exam | State exam |
| Continuing education | None |
| Local license | No (state license covers) |
| Board | Idaho Plumbing Board (DOPL) |
Exam
| Exam provider | PSI (for DOPL) |
| Format | Open book |
| Questions | Journeyman: 100; Contractor: 100 |
| Time | Journeyman: 180 minutes; Contractor: 240 minutes |
| Passing score | Journeyman: 70; Contractor: 75 |
| Bulletin date | 2025-12-10 |
Combined PSI bulletin effective Dec 10, 2025; exam fee $75. DOPL plumbing exam bulletin (July 2023) also says all plumbing exams are open book.
Licensed in another state or the military
| Military experience credit | Yes: credit for relevant military training; expedited processing |
DOPL page covers service members, veterans and spouses; active military may get renewal fee waivers (Idaho Code 67-2606).
- Source: dopl.idaho.gov · checked November 6, 2026
Apprenticeship
| Registering agency | U.S. Department of Labor Office of Apprenticeship (no state agency) |
Programs register through the Office of Apprenticeship; use the Partner Finder for local sponsors.
- Source: apprenticeship.gov · checked November 6, 2026
Plumbing code
| Code in force | Idaho State Plumbing Code (state code) |
- Source: dopl.idaho.gov · checked November 5, 2026