Missouri to California: master plumber license reciprocity

California does not issue a license titled 'master plumber'. The statewide credential that sits above municipal journeyman cards is the C-36 Plumbing Contractor license from the Contractors State License Board. The license is issued to a business entity (sole owner, partnership, corporation or LLC) but is qualified by a named individual who personally meets the experience and exam requirements and is responsible for the classification, so an out-of-state master plumber or plumbing contractor who intends to contract in California applies as that qualifying individual. A master plumber who only wants to work as an employee needs no C-36 license (B&P §7053) and should instead check city journeyman-card rules. To qualify C-36, the individual documents at least four years of journeyman-level or higher plumbing experience within the past 10 years, pays the $450 original application fee, passes both the CSLB Law and Business exam and the C-36 trade exam through PSI within 18 months of application acceptance, is fingerprinted (DOJ $32 plus FBI $17 plus Live Scan rolling fees), posts a $25,000 contractor's bond (and a $25,000 bond of qualifying individual where applicable), carries workers' compensation or files an exemption, and pays the initial license fee of $200 (sole owner) or $350 (non-sole owner) for a two-year license. CSLB reciprocity can waive the C-36 trade exam for a contractor who has held an active license in good standing for the previous five years in an Arizona classification mapped to C-36 (C-37, C-37R Plumbing, K-37, K-77, L-37, L-77). Louisiana, Mississippi and North Carolina reciprocity entries are general building only; Nevada's published list as extracted has no class mapped to C-36. Even when reciprocity is granted CSLB retains the right to require the trade exam, and the Law and Business exam, bond, fingerprinting and all other licensure requirements still apply.

Missouri issues no statewide master plumber or plumbing contractor license. RSMo chapter 341 leaves plumber licensing to cities over 15,000 and first-classification counties, whose boards examine master plumbers, set fees and license terms and (in counties) require master plumber and master drainlayer surety bonds; no state agency licenses the trade and the voluntary statewide contractor license that exists for electrical work has no plumbing counterpart. The master credential therefore exists only locally: Springfield's Master Plumber certification (4 years as a certified journeyman or 10 years' experience, ICC exam, $50), Kansas City's plumbing contractor license qualified by a supervisor holding a certificate of qualification (Prometric or ICC exam, $60 application, $181 four-year renewal; contractor license $55 application, $181 issuance), St. Louis County's Master Plumber license and certified contractor list, and the City of St. Louis Plumbers and Drainlayers Board of Examiners' master plumber and drainlayer licenses. An out-of-state master plumber license carries no state-level recognition; Springfield accepts an identical ICC, Prometric, Experior or Block exam score of 75% or better in place of retesting and Kansas City may accept a comparable exam it deems equivalent, while the St. Louis County and City of St. A master arriving from another state should expect to qualify in each jurisdiction separately and then obtain that jurisdiction's contractor license and bond to pull permits.