Plumber License Requirements in Delaware
| Licensing Authority | Division of Professional Regulation — Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners (DPR) |
| License Type | Master Plumber |
| Experience Required | With journeyman certificate: Complete apprenticeship program plus 2 years work experience under a master plumber. Without journeyman certificate: 7 years work experience under a master plumber. |
| Education Substitute | Completion of a registered apprenticeship program (4 years, 144+ hours/year classroom) satisfies journeyperson requirements |
| Exam Required | Yes — Master Plumber Exam |
| Bond Required | No |
| Insurance | General liability: recommended. Workers comp: required with employees |
| Continuing Education | 5 hours 2 years |
| Processing Time | 4-8 weeks |
Fee Breakdown
| Application Fee | $153 |
| Est. Initial Total | $153 |
Renewal: $153 every 2 years (expires October 31 of even years)
Exam Requirements
Master Plumber Exam
100 questions3 hoursPass: 70%
Delaware Plumbing CodePlumbing systemsSafety practicesCode compliance
Exam provider: ProV
Notes
- 2026 change: Continuing education (5 hours per renewal period) is now required for plumbers starting October 31, 2026
- Master Plumber exam is open-book
Frequently Asked Questions
Do I need a plumber license in Delaware?
Yes, Delaware requires a statewide plumber license through the Division of Professional Regulation — Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners.
How much does a plumber license cost in Delaware?
The estimated initial cost is $153, including application, exam, and license fees.
Data last verified: 2026-04-02 | Source: DPR