Delaware Division of Professional Regulation · checked 2026-10-21
Delaware Plumber License Requirements
Statewide master plumber license issued under 24 Del. C. chapter 18, subchapter II. The subchapter read covers the master license only. Master plumber: 2 years of experience at minimum, plus an exam.
- 1MP · Master plumber 2 years after the prior level
License levels in Delaware
Delaware has one credential on this path: the Master plumber. The source states the time in years.
| Level | Experience | Classroom | Time from start | Exam | Fees |
|---|---|---|---|---|---|
| MP Master plumber | 2 years at the prior level | — | 2 years after the prior level | Yes | Not printed |
Master plumber (MP)
A journeyman's certificate from a plumbing apprenticeship meeting federal apprenticeship standards, then two years of plumbing under a master plumber (or equivalent out-of-state licensee); or seven years under a master plus the board's apprenticeship equivalency test given by a Delaware vocational-technical school. Then a written standardized exam, offered at least quarterly. Source: 24 Del. C. §§ 1808-1809, Master plumber qualifications and exam.
Exam
1 of the 1 level listed here requires an exam: Master plumber. The source does not print a pass mark.
Fees
The Delaware source read prints no dollar amounts for this license. The code sections read print no fees.
Reciprocity
The Delaware sources read for this trade name no reciprocity agreement and no route for out-of-state licensees.
How Delaware compares
Delaware's source gives 2 years for the master plumber on top of the earlier level, but no time for the earlier level itself, so the full path cannot be ranked against other states.
Same trade elsewhere: California · Texas · Florida · Illinois · Ohio. All states side by side: Plumber license requirements by state.
Other trades in Delaware
- Electrician: Master electrician: 4 years of experience at minimum, plus an exam.
- HVAC: Master HVACR: 2 years of experience at minimum, plus an exam.
All covered trades on one page: Delaware trade licenses.
Background reading: From apprentice to master: how long each state takes · How trade license exams work.
Questions
Who issues the plumber license in Delaware?
Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners. Statewide master plumber license issued under 24 Del. C. chapter 18, subchapter II. The subchapter read covers the master license only.
How long does it take to qualify for the Master plumber in Delaware?
2 years by this site's count, plus however long the earlier level takes. A journeyman's certificate from a plumbing apprenticeship meeting federal apprenticeship standards, then two years of plumbing under a master plumber (or equivalent out-of-state licensee); or seven years under a master plus the board's apprenticeship equivalency test given by a Delaware vocational-technical school. Then a written standardized exam, offered at least quarterly.
Does Delaware have plumber license reciprocity?
The Delaware sources read name no reciprocity agreement for this trade.
Sources and last checked
| What | Source | Checked |
|---|---|---|
| Issuing authority | Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners | 2026-10-21 |
| MP requirements | 24 Del. C. §§ 1808-1809, Master plumber qualifications and exam | 2026-10-21 |
| Law cited | 24 Del. C. §§ 1808, 1809 | 2026-10-21 |
This page summarises what the Delaware source said on 2026-10-21. It is general information, not legal advice; the board's own page and the statute are the authority and can change. Confirm with Delaware Division of Professional Regulation before applying. The free official route is the board itself: its page, application forms and staff answer eligibility questions.