How to Become a Plumber in California

Thinking about becoming a plumber in California? It's a smart choice. With growing housing demand, strict water regulations, and an aging infrastructure, licensed plumbers are in high demand across the Golden State.

Whether you're right out of high school or switching careers, this guide walks you through how to become a licensed plumber in California - backed by info from the California Contractors State License Board (CSLB)[^1], U.S. Department of Labor[^2], and state-approved apprenticeship programs.

🧰 Do Plumbers Need a License in California?

Yes. To legally perform plumbing work valued at $500 or more (labor + materials), you must hold a C-36 plumbing contractor license issued by the CSLB[^1].

“Anyone performing plumbing work in California for $500 or more must be licensed by the CSLB.” - California Contractors State License Board[^1]

If you're working under a licensed contractor (like during an apprenticeship), you don't need your own license right away.

🪜 Step-by-Step: How to Become a Plumber in California

1. Meet Basic Requirements

• At least 18 years old
• High school diploma or GED
• Legal right to work in the U.S.
• Able to pass a background check[^3]

2. Enroll in a Plumbing Apprenticeship or Trade School

Most new plumbers start by enrolling in a state-registered apprenticeship or plumbing trade school. Apprenticeships are the most common route.

“California apprenticeships combine paid on-the-job training with classroom instruction, preparing you for long-term success.” - California Division of Apprenticeship Standards[^4]

Where to Apply:

• PHCC of California
• UA Local Unions
• Summit College

3. Log Required Work Experience

To apply for your own CSLB license, you must prove at least 4 years (8,000 hours) of journey-level experience in plumbing within the last 10 years[^1].

• Work experience must be verified by an employer or union representative
• Time spent in an approved apprenticeship counts toward this

4. Apply for the C-36 Plumbing Contractor License

Once you meet the experience requirement, you're eligible to apply for the C-36 license through the CSLB.

5. Pass the California Plumbing License Exams

Exams are administered by CSLB and PSI. You must pass both sections to be licensed.

💰 Estimated Cost Breakdown

🔗 Explore More California Trades

• Electrician in California
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• Welder in California
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• Carpenter in California

🙋 Frequently Asked Questions

Do plumbers need to be licensed in California?
Yes - if you perform plumbing jobs worth $500 or more, a CSLB license is required.

How long does it take to become a plumber in California?
It typically takes 4-5 years through an apprenticeship to become licensed.

Do I need a license to work as a plumbing apprentice?
No. You can work under a licensed contractor while training.

Can I get financial aid for plumbing school?

📚 Citations

[^1]: California Contractors State License Board - Plumbing Licensing: https://www.cslb.ca.gov
[^2]: U.S. Bureau of Labor Statistics - Plumbers, Pipefitters, and Steamfitters: https://www.bls.gov/ooh/construction-and-extraction/plumbers-pipefitters-and-steamfitters.htm
[^3]: California Department of Justice - Background Checks: https://oag.ca.gov/fingerprints
[^4]: California Division of Apprenticeship Standards: https://www.dir.ca.gov/das
[^5]: CSLB Surety Bond Info: https://www.cslb.ca.gov/Contractors/Surety_Bonds