California Plumbing Contractor License Cost & Requirements (2026)
The C-36 is CSLB's plumbing classification: the license a business needs to contract for plumbing work in California. In one respect it is the simplest specialty license on this site. We checked the CSLB fee schedule, the bond requirements, and the workers' compensation rules line by line for this page, and the C-36 appears in no special provision at all: no surcharge, no extra bond, no classification-specific bar. What you see on this page is the standard CSLB route, unchanged.
That plainness cuts both ways. Plumbing applicants make the same mistakes as everyone else, on experience paperwork and exam fees, but they also get one break that roofers and HVAC contractors do not: a C-36 holder with no employees can claim the workers' compensation exemption, as long as the exemption is actually filed with CSLB.
California Plumbing Contractor Fee Estimator
Regulatory fee breakdown for Class C-36 - Plumbing Contractor License
California requires a $25,000 surety bond. Its annual premium is set by the surety provider; the board publishes no rate, so it is not included in the total.
Itemized Fee Schedule
Need your $25,000 Surety Bond?
Boards do not sell bonds. Before you buy one, read how a surety bond works, what the premium is based on, and how a bond differs from liability insurance.
Read: Bonds vs Liability InsuranceContractors State License Board (CSLB)
All applications and exams must be registered directly with this board.
Fee figures on this page were checked against California Contractors State License Board (CSLB) on October 29, 2026. View the official source
Regulatory & Licensing Requirements Summary
| Official License Classification | Class C-36 - Plumbing Contractor License |
| Minimum Experience | 4 Years (Journeyman / Field Supervisor) |
| Mandatory State Surety Bond | $25,000 Bond Required |
| General Liability Insurance | LLCs only: $1,000,000 minimum (Bus. & Prof. Code §7071.19). California sets no GL minimum for other license types. |
| Estimated Application Processing Time | Not published by the board |
| Renewal Cycle & CE Requirement | Every 2 year(s), with no continuing education requirement |
Warning: Unlicensed Contracting Penalties in California
Misdemeanor: a first conviction can bring up to 6 months in county jail and/or a fine of up to $5,000 (Bus. & Prof. Code §7028), plus a possible CSLB administrative fine of $200 to $15,000 (§7028.7). Consumers harmed by unlicensed work can also sue for treble damages under Code Civ. Proc. §1029.8, with the added award capped at $10,000.
Note: In many states, unlicensed contractors also lose the ability to file mechanic's liens or sue for non-payment in civil courts.
Special Statutory Notes for California
The honest headline for the C-36 is that nothing about it is special. CSLB's plumbing classification runs the board's standard route: no surcharge, no extra bond, no classification-specific bar. The qualifier needs at least 4 years of journey-level plumbing experience within the last 10 years. Both PSI sittings together cost $102.86: Law & Business and the C-36 trade exam at $51.43 apiece, paid directly to PSI.
Live Scan fingerprinting is compulsory, and the checks behind it set the floor: DOJ $32 and FBI $17 make a $49 minimum, with the operator who rolls your prints charging a location-dependent fee on top. Issuance waits on bonds. Every applicant files a $25,000 contractor's bond, and where an RME or a minority-owner RMO qualifies the license, a $25,000 Bond of Qualifying Individual is required as well.
CSLB charges $200 to issue the license to a sole owner and $350 to a company. Workers' compensation is where plumbing sits on the flexible side of the rules: the licensee keeps either a workers' compensation certificate on file with CSLB or, if the business has no employees, an exemption. The exemption that roofing and HVAC contractors are barred from claiming stays open to this classification.
CSLB requires no continuing education for renewal, and every new applicant must complete the board's open-book asbestos examination before licensure (Business and Professions Code section 7058.5). Active licenses renew every 2 years at $450 for a sole owner or $700 for a company, with delinquent renewals at $675 and $1,050.
California licenses contractors through the CSLB. A license is required for any project where the combined cost of labor, materials and all other costs is $1,000 or more, and also whenever a building permit is required or employee labor is used, whatever the project costs.
The standard route: what applies to C-36 and what does not
Every CSLB applicant pays the same skeleton of fees, and the C-36 adds nothing to it. The application is $450. The two exams, Law and Business and the C-36 trade exam, are run by PSI at $51.43 per sitting.
The initial license fee is $200 for a sole owner or $350 for a company, and the bond is the standard $25,000 contractor bond under section 7071.6 of the Business and Professions Code. Even the renewal trap is somebody else's: CSLB's higher $470 renewal rate names the C-10 electrical classification only, so plumbers renew at the standard $450.
Workers' compensation is where the C-36 genuinely differs from its neighbors. Every active licensee must have either a workers' compensation certificate or a signed no-employee exemption on file with CSLB. Five classifications are barred from the exemption and must carry the insurance even with no employees. Plumbing is not one of them. A one-person C-36 operation can file the exemption, but filing is not optional paperwork: with neither a certificate nor an exemption on file, the license is not compliant.
Experience and exams for plumbing applicants
The qualifier needs at least four full years of experience at journey level, or working as a foreman, supervisor, or contractor in the classification, gained within the ten years before filing. Apprentice years do not convert into journey-level years, and experience older than the ten-year window does not count at all, which is the arithmetic that catches experienced plumbers who spent years working outside the trade or outside California.
After CSLB accepts the application, the qualifier sits the two PSI exams at $51.43 each, charged per attempt, with 3.5 hours allowed per exam. Fingerprinting is mandatory for the qualifier and the other personnel of record: $32 to the Department of Justice and $17 to the FBI, plus a Live Scan rolling fee that varies by location. First-time qualifiers also complete CSLB's open-book asbestos examination under section 7058.5 before the license issues. It is an awareness test, not asbestos certification.
Mistakes that delay a California Plumber application
- Budgeting a $470 renewal because a website quoted it as the California rate. That rate belongs to the C-10 electrical classification only; C-36 renewals are $450 for a sole owner.
- Working with no employees and never filing the workers' compensation exemption. The exemption is available to C-36 holders, but only once it is on file with CSLB.
- Treating the PSI exam fees as part of the $450 application fee. The $102.86 for the two exams is paid separately, to PSI, per attempt.
- Counting apprenticeship years toward the four years. CSLB credits journey-level, foreman, supervisor, or contractor experience inside the last ten years.
- Assuming the bond premium is a set figure. CSLB publishes no premium for the $25,000 bond; surety companies price it, and quotes vary.
California Plumber Licensing FAQ
Does a C-36 plumber with no employees need workers' compensation insurance?
No, provided the exemption is filed. C-36 is not among the five classifications barred from the no-employee exemption under section 7125 (those are C-8 concrete, C-20 HVAC, C-22 asbestos abatement, C-39 roofing, and C-61/D-49 tree service). A C-36 licensee must have one or the other on file with CSLB: a workers' compensation certificate, or the signed exemption.
Is there a C-36-specific bond or fee surcharge?
No. We checked the CSLB fee schedule for classification-specific charges and the C-36 appears in none of them. The bond is the standard $25,000 contractor bond, the renewal is the standard $450 for a sole owner, and CSLB's one named surcharge, the $470 renewal, applies to the C-10 electrical classification only. A second $25,000 Bond of Qualifying Individual can apply to any classification when the qualifier is an RME or a minority-owner RMO.
Can a C-36 contractor install or remove underground storage tanks?
Only with an additional credential. C-36 licensees are eligible to apply for CSLB's Hazardous Substance Removal certification, and it is that certification, not the base C-36, that covers installing and removing underground storage tanks that serve a building. It has its own application and examination and is not part of the standard licensing route costed on this page.
Can a Class B general contractor do a plumbing-only job without a C-36?
Only by subcontracting the plumbing to a licensed C-36 contractor, or by holding the C-36 as well. Under section 7057, a prime contract for a single trade outside framing and carpentry needs at least two unrelated trades in the project, the specialty classification, or a licensed specialty subcontractor doing that trade. A stand-alone plumbing contract is C-36 work.
How much does a Plumbing Contractor license cost in California?
The filing and licensing fees on the California Plumbing Contractor schedule total approximately $752.86. This consists of a $450 application fee, a $102.86 examination fee, and a $200 initial license fee. A $25,000 surety bond is also required; its annual premium is set by the surety provider and no official rate is published.
How long does it take to get a Plumbing Contractor license in California?
Contractors State License Board (CSLB) does not publish a fixed end-to-end processing time for this license. CSLB publishes the application receipt dates it is currently processing rather than a fixed timeframe, so check CSLB's processing page for the live position.
What are the penalties for working as an unlicensed Plumber in California?
Misdemeanor: a first conviction can bring up to 6 months in county jail and/or a fine of up to $5,000 (Bus. & Prof. Code §7028), plus a possible CSLB administrative fine of $200 to $15,000 (§7028.7). Consumers harmed by unlicensed work can also sue for treble damages under Code Civ. Proc. §1029.8, with the added award capped at $10,000.
How often do you need to renew a Plumber license in California?
Licenses must be renewed every 2 year(s) with a renewal fee of $450. No continuing education is required for renewal.