Transfer Your Plumber License to California: Reciprocity & Endorsement (2026)

The structural fact first: California does not issue a statewide journeyman plumber license, so "which board do I apply to" has no state-level answer and there is no state credential to carry across. Your first task is to identify the authority that governs the jobsite — a contractor-level board, or the city or county where you will work — and read its exam and experience rules directly. Just as important on the way out: a credential earned under California's regime generally will not satisfy another state's condition that you hold a state license earned by examination, so expect new-applicant treatment if you later move to a state that does license at the state level. Treat the notes below as directions to the right authority, not a transfer checklist.

California has no state journeyman/master plumber license; the CSLB licenses only plumbing CONTRACTORS (C-36), which requires 4 years of journey-level experience and passing the trade + law/business exams. Because the canonical journeyman credential does not exist at the state level, endorsement_available, full_reciprocity, and reciprocity_partners are false/empty. CSLB's contractor-tier reciprocity maps to C-36 only with Arizona (C-37 / C-37R; trade exam may be waived, Law & Business exam always required, five-year good-standing license required); its agreements with Louisiana, Mississippi, Nevada, and North Carolina map to general building or sanitation classifications, not C-36. No journeyman license lookup exists (CSLB 'Check a License' verifies contractors). An aggregator claim that California has no plumbing reciprocity with any state is contradicted by CSLB's own classification list and was rejected.