Plumber License Requirements in California
License Not RequiredLast verified March 9, 2026
Agency And Exam
Issuing agency: California Contractors State License Board
Official licensing agency website
Exam provider: PSI
Reciprocity And License Levels
License levels
C-36 Plumbing Contractor
Reciprocity states
None listed
Notes
California does not maintain a separate statewide journeyman plumber license in the way it certifies electricians. Instead, CSLB licenses plumbing contractors in the C-36 classification for projects that require a building permit, use employees, or involve at least $1,000 in combined labor and materials. Verified against California Contractors State License Board materials on 2026-03-09.