Illinois to Wisconsin: journeyman plumber license reciprocity

Wisconsin issues a statewide Journeyman Plumber license through the Department of Safety and Professional Services (DSPS); under Wis. Stat. 145.06 no person may engage in or work at plumbing in the state unless licensed by DSPS, and there is no municipal plumber licensing. Under SPS 305.93 a journeyman works under the general supervision of a Master Plumber, Master Plumber Restricted or Utility Contractor licensee, qualifies by completing a plumbing apprenticeship under Wis. Stat. ch. 106, and must complete 24 hours of approved continuing education to renew. A new applicant files Form 3126 (with the Form 3126T experience table) in the LicensE portal at license.wi.gov, is made eligible to test, and must pass the DSPS journeyman plumber examination, which is a two-part, open-book exam with a 70% passing score covering Wis. Stat. ch. 145, SPS 305, the SPS 381-387 plumbing code, NFPA 13D/24 and the POWTS component manuals (the updated plumbing code applies to exams from October 1, 2026). DSPS's plumber pages name no reciprocity states, and the electrical reciprocity statute (Wis. Stat. 101.874) does not extend to plumbers.

Illinois has no journeyman plumber licence. Under the Illinois Plumbing License Law (225 ILCS 320) the Department of Public Health issues a single Plumber licence plus an Apprentice Plumber licence; there is no intermediate journeyman card and no master tier, and the City of Chicago's parallel programme under Section 16 follows the same two-tier structure. Every person who performs plumbing must hold one of those two licences (Section 3(1)). An out-of-state journeyman therefore has nothing to transfer to: the choices are (1) register as an Illinois Apprentice Plumber (age 16 or older, sponsored by an Illinois licensed plumber or an approved apprenticeship programme, maximum six years as an apprentice) and work under supervision, or (2) qualify for the full Illinois Plumber licence, where Section 17(b) lets a plumber licensed by another state with substantially equal requirements sit the Illinois examination without first serving the four-year Illinois apprenticeship. Whether a journeyman-level origin licence counts as 'substantially equal' to the Illinois Plumber licence is decided by the State Board of Plumbing Examiners case by case and is not addressed on the IDPH page reviewed; see the master level for the licence route.