California to Louisiana: journeyman plumber license reciprocity

Louisiana licenses Journeyman Plumbers statewide through the State Plumbing Board of Louisiana (SPBLA), which also registers apprentices and licenses Residential Plumbers, Master Plumbers, natural gas fitters and medical gas and WSPS endorsements. A new in-state applicant must be a registered apprentice with 7,000 hours (indentured, in a Louisiana Workforce Commission-approved program) or 8,000 hours (unindentured) of supervised plumbing work documented by payroll records or W-2s, file a notarized application with $135 ($125 exam + $10 processing), and pass a Board-administered 80-question, 3-hour written exam on the 2021 IPC/IRC plus a 1-hour practical, scoring at least 70% in each category. The first license costs $50; licenses expire December 31 each year and renewal requires 3.5 hours of continuing professional education each year. A journeyman works under a licensed Louisiana Master Plumber and must be employed by a licensed master company for the license to be 'workable'. The Board has signed journeyman reciprocity agreements only with Texas and Arkansas; a plumbing license from any other state qualifies the holder to sit the Louisiana journeyman exam without Louisiana apprentice registration, provided the origin state required at least 8,000 on-the-job hours. Act 908 of the 2026 session transfers plumbing licensing to the Louisiana State Licensing Board for Contractors on January 1, 2027; existing licenses carry over, and the Act lowers the experience needed for the journeyman license to 2,500 hours of verified apprentice work.

California does not issue a statewide journeyman plumber or master plumber license. The only state plumbing credential is the C-36 Plumbing Contractor classification from the Contractors State License Board (CSLB), which is a contractor license qualified by a named individual, not a personal tradesperson card. Business and Professions Code §7053 takes wage employees outside the Contractors State License Law, so a plumber who works for a C-36 contractor needs no CSLB license; California's personal electrician certification (Labor Code §108) has no plumbing counterpart. Some cities and counties still examine and card journeyman plumbers (certificate of competency / journey-level plumber) for work in that jurisdiction. Those cards are not statewide, are not issued by CSLB, and an out-of-state journeyman plumber license is not recognized by any state board. An arriving journeyman should ask the building department where the job is whether a local plumber card is required and sit that city's exam; contracting independently requires a C-36 license, described at the master level.