Requirements, license levels, and the issuing authority — sourced from Minnesota's official board.
CORRECTION: renewal is biennial (expires Dec 31 of odd years) with 16 hours CE per cycle, not annual as in current data.
| Requirements | Journeyworker: pass a written exam (70%) and complete a DLI-registered apprenticeship (7,000 hours over 4 years + 576 hours related classroom instruction), or show sufficient experience as a registered unlicensed plumber, or hold an equivalent out-of-state license. Master: pass exam and hold a journeyworker license for at least 1 year (or equivalent out-of-state master, or restricted master + 5 years as a MN plumbing contractor). Contractor: business license requiring a master plumber as responsible person. |
| Reciprocity | Equivalent out-of-state licenses accepted toward journeyworker/master eligibility. |
| Renewal | Biennial - journeyworker and plumber licenses expire December 31 of odd-numbered years; 16 hours CE per 2-year period (at least 8 hours on the State Plumbing Code). |
| Notes | CORRECTION: renewal is biennial (expires Dec 31 of odd years) with 16 hours CE per cycle, not annual as in current data. |
Sources: www.dli.mn.gov. Always confirm current requirements with the issuing authority.
New licenses, ladder upgrades, classification changes and lapses, by market and credential tier. Read the quarterly free, or license the underlying data.