To legally perform plumbing work in California, contractors must hold a statewide C-36 California Plumbing Contractor License issued by the Contractors State License Board (CSLB). Applicants need at least four years of journeyman-level experience, must pass two exams, and provide a $25,000 surety bond.
California Plumbing Contractor License Regulatory Authority
- CSLB (Contractors State License Board) oversees plumbing licensing under California Business & Professions Code §7000.
- Address: 9821 Business Park Drive, Sacramento, CA 95827
- Phone: 800-321-CSLB (in CA), 916-255-3900 (outside CA)
Eligibility Requirements to Become Licensed Plumbing Contractor
- Age: Minimum 18 years.
- Experience: 4 years journeyman-level within last 10 years (8,000 hours).
- Education: Accredited degree may substitute up to 3 years.
- Background Check: Mandatory fingerprinting; criminal convictions reviewed.
- Bond: $25,000 surety bond required.
Exams
- Law & Business Exam: 115 questions, 3.5 hours, pass score 72%.
- C-36 Plumbing Trade Exam: 100 questions, 3.5 hours, pass score 72%.
- Covers California Plumbing Code, safety, estimating, and installation practices.
- Administered by PSI.
Fees & Renewal
- Application Fee: $450
- Initial License Fee: $200
- Fingerprinting: $49
- Total Initial Cost: ~$699
- Renewal: $450 every 2 years (no continuing education required)
Renewal Cycle of C-36 Plumbing Contractor License
- Active licenses: Expire every 2 years.
- Inactive licenses: Expire every 4 years.
- Renewal notices are mailed 60 days before expiration. If not received within 45 days, you can request one online or by calling 800-321-CSLB.
Renewal Fees
| License Type | Timely Renewal Fee | Delinquent Renewal Fee |
|---|---|---|
| Sole Owner Active | $450 | $675 |
| Sole Owner Inactive | $300 | $450 |
| Non-Sole Owner Active | $700 | $1,050 |
| Non-Sole Owner Inactive | $500 | $750 |
Renewal Process for C-36 Plumbing Contractor License
- Complete Renewal Application
- Must be received at CSLB headquarters before expiration.
- Processing times vary, so submit early.
- Pay Fees
- Online renewal available for single-qualifier licenses.
- Multiple-qualifier licenses must mail or hand-deliver forms.
- Workers’ Compensation Certification
- Active licensees must certify classification codes tied to payroll.
- Outstanding Fees
- Any unpaid Industry Expert Recovery Fees must be settled at renewal.
Risks of Missing Renewal of Plumbing License
- Unlicensed Time: Contractors cannot legally perform work until reinstated.
- Delinquent Fees: Higher costs apply after expiration.
- Reinstatement Window: Licenses can be reinstated within 90 days of expiration if renewal application and fees are submitted.
Quick Checklist
- Submit renewal application 60 days before expiration.
- Pay correct fee (active vs. inactive, sole vs. non-sole owner).
- Certify workers’ compensation codes.
- Clear outstanding enforcement fees.
- Verify business entity hasn’t changed.
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