Home / Plumbers / Delaware / License
How much experience do you need in Delaware?
Two years under a master licensee after an apprenticeship journeyman certificate, or seven years under a master licensee without one2
Keep your own record of hours, employers and pay stubs. Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners can ask for proof when you apply.
What is the Delaware plumber exam like?
Yes, a master exam through ProV (70% to pass). Applicants without a journeyman certificate must also pass an apprenticeship by-pass exam. After three failed attempts an applicant must wait a year and reapply. ProV Exam (the apprenticeship by-pass exam is given by Delaware technical schools or ABC Delaware).1
How much does the plumber license cost?
Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners lists these fees.3
| Fee | Amount |
|---|---|
| Master plumber | $173 |
| Temporary | $40 |
How do you renew it?
Every 2 years; licenses expire October 31 of even-numbered years.4 Continuing education: 5 hours per 2-year renewal: 3 on code changes, 1 on safety and 1 on cross connections and backflow; reduced or none in the first two years of a license.5
Does a license from another state count in Delaware?
Master plumbers licensed in Connecticut, Iowa or Maryland are treated as substantially similar; holders from other listed states must show 7 years of practice after licensure.2
License levels in Delaware
Master Plumber (water supply, drain and waste, and gas piping) and a temporary plumber license.
Applications, exam booking and hour forms are on Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners's site.
More for plumbers in Delaware
Sources
- Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners: exam (dpr.delaware.gov, 2026-10-27)
- Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners: experience (dpr.delaware.gov, 2026-10-27)
- Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners: fees (dpr.delaware.gov, 2026-10-27)
- Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners: renewal (dpr.delaware.gov, 2026-10-27)
- Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners: continuing education (regulations.delaware.gov, 2026-10-27)
- Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners: licensing (dpr.delaware.gov, 2026-10-27)