Plumber License Requirements in North Dakota
| Licensing Authority | North Dakota State Plumbing Board (NDSPB) |
| License Type | Journeyman / Master Plumber |
| Experience Required | Journeyman: 4-year (7,600 hours) apprenticeship. Master: 2 years (3,400 hours) as licensed journeyman plumber. |
| Exam Required | Yes — ND Plumbing Exam |
| Bond Required | No |
| Insurance | General liability: required. Workers comp: required with employees |
| Continuing Education | 4 hours every 2 years |
| Processing Time | 2-4 weeks |
Fee Breakdown
| Application Fee | $50 |
| Initial License Fee | $100 |
| Master plumber license | $200 |
| Master plumber renewal | $200 |
| Est. Initial Total | $550 |
Renewal: $100 every 1 year (expires December 31)
Exam Requirements
ND Plumbing Exam
100 questions5 hoursPass: 80%
Plumbing code (closed book, 100 multiple choice)Open book sections (40 completion questions)Water pipe sizingDrain, waste, and vent calculations
License Tiers
Journeyman Plumber
4 years (7,600 hours) apprenticeship
Exam: Required
Master Plumber
2 years (3,400 hours) as licensed journeyman
Exam: Required
Notes
- Exam has 4 parts: closed-book multiple choice, open-book completion, water pipe sizing, and DWV calculations
- 6-month waiting period required after failing the exam before retaking
Frequently Asked Questions
Do I need a plumber license in North Dakota?
Yes, North Dakota requires a statewide plumber license through the North Dakota State Plumbing Board.
How much does a plumber license cost in North Dakota?
The estimated initial cost is $150, including application, exam, and license fees.
Data last verified: 2026-04-02 | Source: NDSPB