Plumber License Requirements in Hawaii
| Licensing Authority | Contractors License Board — Department of Commerce and Consumer Affairs (DCCA) |
| License Type | C-37 Plumbing Contractor |
| Experience Required | 4 years of full-time hands-on plumbing experience within the last 10 years. Must provide chronological project documentation and certified references. |
| Education Substitute | Accredited plumbing or mechanical engineering degree may substitute for up to 2 years of experience |
| Exam Required | Yes — Hawaii Contractor Business & Law + C-37 Plumbing Trade Exam |
| Bond Required | Yes — $5,000 |
| Insurance | General liability: required. Workers comp: required with employees |
| Continuing Education | Not required |
| Processing Time | 8-12 weeks |
Fee Breakdown
| Application Fee | $50 |
| Exam Fee | $165 |
| Initial License Fee | $633 |
| RME initial license fee | $208 |
| RME renewal fee | $208 |
| Est. Initial Total | $1,264 |
Renewal: $338 every 2 years (expires September 30 of even years)
Exam Requirements
Hawaii Contractor Business & Law
80 questions3 hoursPass: 75%
C-37 Plumbing Trade Exam
100 questions4 hoursPass: 75%
Uniform Plumbing CodePlumbing systemsSafetyEstimating
Exam provider: PSI
Notes
- CPA-prepared financial statement required with application
- Clean credit report covering previous 5 years required
Frequently Asked Questions
Do I need a plumber license in Hawaii?
Yes, Hawaii requires a statewide plumber license through the Contractors License Board — Department of Commerce and Consumer Affairs.
How much does a plumber license cost in Hawaii?
The estimated initial cost is $848, including application, exam, and license fees.
Data last verified: 2026-04-02 | Source: DCCA