Plumber License Requirements in Idaho
License RequiredLast verified March 9, 2026
Agency And Exam
Issuing agency: Idaho State Plumbing Board
Official licensing agency website
Exam provider: IAPMO / PSI
Reciprocity And License Levels
License levels
Journeyman PlumberPlumbing ContractorSpecialty JourneymanSpecialty Contractor
Reciprocity states
None listed
Notes
Idaho DOPL requires initial Plumbing Journeyman applicants to meet experience requirements and pass the IAPMO examination before applying for licensure. The plumbing information page directs applicants to register for and pass the IAPMO exam through PSI, and the Board fee table lists Journeyman, Contractor, Specialty Journeyman, and Specialty Contractor license types. Verified against Idaho State Plumbing Board licensing and exam pages on 2026-03-09.