Overview
Plumbing licenses are required in most states for commercial or large residential work, but requirements vary: some states mandate statewide licensing, others defer to local jurisdictions. Common paths involve apprenticeships (typically 4,000-8,000 hours), journeyman/master exams, and fees from $120-$400. BLS data shows median pay at $61,550 (2023), 2% job growth to 2033, and 43,300 annual openings.
General Steps to Licensure
- Apprenticeship: Log 4,000-8,000 supervised hours (e.g., Alabama: 4,000; Alaska/Arizona: 8,000).
- Exams: Pass trade exam (IPC/UPC-based) and often business/law test.
- Experience: 1-4 years as journeyman for master level.
- Other: Proof of insurance, bonding, background check; CEUs (0-16 hours).
OSHA notes plumbing's injury rate at 2.9 per 100 workers (higher than average); safety training is key.
State Requirements
Check your state's board (e.g., CSLB in CA). Examples:
- California: C-36 license for jobs over $500/$1,000; 4 years (6,800 hours) experience, trade/business exams, $10,000 bond. CSLB authority.
- Florida: 8,000 hours; certified contractor needs 4 years (1 as supervisor), exams, background check. 14 CE hours.
- Nebraska: No statewide; local (e.g., Omaha) licenses for apprentice/journeyman/master; DOL registration.
- Wisconsin: Master plumber for business; 1,000 journeyman hours + exam. DSPS.
- No State License: Kansas, Wyoming (local only); Missouri, Pennsylvania vary locally.
Full table at LicenseMap: 33 states require journeyman/master; codes like IPC (most) or UPC.
Apprenticeships and Career Data
UA/IEC programs offer 4-5 year apprenticeships combining work/school. 43,300 openings/year due to retirements. Start as trainee; advance to journeyman (exam after hours), then master.