New Hampshire Plumbing License Requirements
Yes. New Hampshire licenses plumbers through the NH Mechanical Licensing Board (OPLC). It issues apprentice, journeyman, master and contractor credentials.
State plumber license · By BrazeJobs Team · Updated
License tiers
| Apprentice | Apprentice ($88) |
| Journeyman | State license ($198) |
| Master | State license ($330) |
| Contractor | Master |
Requirements
| Classroom hours | Apprenticeship classroom |
| Exam | State exam (journeyman $190, master $310) |
| Fees | License: apprentice $88, journeyman $198, master $330 |
| Renewal | 2 years |
| Continuing education | 3 hours code update/year (6 per cycle) |
| Local license | No (state license covers) |
| Board | NH Mechanical Licensing Board (OPLC) |
Licensed in another state or the military
| Reciprocity | Per Plc 313.34 qualifying jurisdictions |
- Source: oplc.nh.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 | 2024 IPC with state amendments |
RSA 155-A:1 IV state building code, with amendments approved as of Oct 10, 2025 and ratified by the legislature.
- Source: gencourt.state.nh.us · checked November 5, 2026