Requirements, license levels, and the issuing authority — sourced from Illinois's official board.
CE now confirmed at 4 hours annually.
| Requirements | Governed by the Illinois Plumbing License Law (225 ILCS 320). Plumber: employed as a licensed apprentice for a minimum of 4 years (48-72 months), completion of at least 2 years of high school (or equivalent) plus approved coursework through a college/university/trade school, then pass the state licensing exam. Apprentice: sponsored/registered. |
| Reciprocity | Not established statewide. |
| Renewal | Plumber licenses renew annually by April 30; 4 hours of continuing education required annually. (Plumbing-contractor registrations expire annually Sept. 30.) |
| Notes | CE now confirmed at 4 hours annually. |
Sources: dph.illinois.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.