Plumber License Requirements in New Hampshire
| Licensing Authority | Office of Professional Licensure and Certification, Mechanical Safety and Licensing Board (OPLC) |
| License Type | Journeyman / Master Plumber |
| Experience Required | Journeyman: minimum 3,000 hours of on-the-job training. Master: must have been a licensed journeyman plumber for at least 6 months. |
| Exam Required | Yes — NH Master Plumber Exam |
| Bond Required | No |
| Insurance | General liability: recommended. Workers comp: required with employees |
| Continuing Education | 6 hours every 2 years |
| Processing Time | 3-6 weeks |
Fee Breakdown
| Application Fee | $75 |
| Exam Fee | $90 |
| Initial License Fee | $310 |
| Apprentice plumber application/renewal | $88 |
| Journeyman plumber renewal | $180 |
| License verification fee | $10 |
| Est. Initial Total | $753 |
Renewal: $300 every 2 years
Exam Requirements
NH Master Plumber Exam
Exam provider: PSI
License Tiers
Apprentice Plumber
Entry level — must work under supervision
Exam: Not required
Journeyman Plumber
3,000 hours of on-the-job training
Exam: Required
Master Plumber
6 months as licensed journeyman plumber
Exam: Required
Frequently Asked Questions
Do I need a plumber license in New Hampshire?
Yes, New Hampshire requires a statewide plumber license through the Office of Professional Licensure and Certification, Mechanical Safety and Licensing Board.
How much does a plumber license cost in New Hampshire?
The estimated initial cost is $475, including application, exam, and license fees.
What experience do I need for a plumber license in New Hampshire?
Journeyman: minimum 3,000 hours of on-the-job training. Master: must have been a licensed journeyman plumber for at least 6 months.
What exams are required for a plumber license in New Hampshire?
You must pass the NH Master Plumber Exam exam. A passing score of 70% is required. Exams are administered by PSI.
How long does it take to get a plumber license in New Hampshire?
Processing time is typically 3-6 weeks after submitting a complete application.
Is continuing education required for plumbers in New Hampshire?
Yes, 6 hours per every 2 years is required for license renewal.
Data last verified: 2026-04-02 | Source: OPLC