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 |
| Est. Initial Total | $848 |
Related & additional fees
Separate or ongoing costs — not included in the estimate above.
| RME initial license fee | $208 |
| RME renewal fee | $208 |
Renewal: $338 every 2 years (expires September 30 of even years)
Exam Requirements
Hawaii Contractor Business & Law
C-37 Plumbing Trade Exam
Exam provider: PSI
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- 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. A $5,000 surety bond is also required.
What experience do I need for a plumber license in Hawaii?
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
What exams are required for a plumber license in Hawaii?
You must pass the Hawaii Contractor Business & Law and C-37 Plumbing Trade Exam exams. A passing score of 75% is required. Exams are administered by PSI.
Do I need a bond for a plumber license in Hawaii?
Yes, a $5,000 surety bond is required. Bond amount determined case-by-case by the Board, from $5,000 to $300,000.
How long does it take to get a plumber license in Hawaii?
Processing time is typically 8-12 weeks after submitting a complete application.
Is continuing education required for plumbers in Hawaii?
No, Hawaii does not currently require continuing education for plumber license renewal.
Next steps
You know the requirements for plumbers in Hawaii— here's how to actually pass and apply.
Data last verified: 2026-04-02 | Source: DCCA