Plumbing Contractor Permit Requirements in San Diego, CA

Complete permit and license guide for starting a plumbing contractor in San Diego, San Diego County, California.

Updated 2026-02-15 6 stops $1,200–$3,500 est. 3–6 months (dominated by CSLB exam scheduling)
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Not legal advice. Requirements may change — always verify with your local government authority before applying. This guide was compiled from public and official sources (last updated ) and has not yet been independently source-verified — confirm each requirement before acting on it.

Federal — start here

1 stop

  1. EIN (Employer Identification Number)

    Required if you have employees or operate as an LLC/corporation. Free from the IRS.

    Official government source

    FreeImmediate (online application)

State of California

3 stops

  1. California C-36 Plumbing Contractor License

    Required to contract for plumbing work in California. Issued by the California Contractors State License Board (CSLB). Applicants must pass a trade exam and law/business exam, have at least 4 years of journey-level experience, and provide proof of a $25,000 contractor's bond and workers' compensation insurance.

    Official government source

    $450 application fee + $200 exam fee3–6 months (application review, exam scheduling)

  2. California Contractor's Bond ($25,000)

    All licensed contractors in California must maintain a $25,000 surety bond filed with the CSLB. Required for initial licensure and renewal.

    Official government source

    $100–$300/year (bond premium)1–3 days

  3. California Workers' Compensation Insurance

    Required for all contractors with employees. Sole owners must carry workers' comp or file a certification of exemption with the CSLB.

    Official government source

    Varies by payroll and classification1–5 days to obtain policy

City of San Diego / San Diego County

2 stops

  1. City of San Diego Business Tax Certificate

    All businesses operating in San Diego must obtain a Business Tax Certificate from the City of San Diego Development Services Department. Plumbing contractors must list their California C-36 license number. Renew annually.

    Official government source

    $75–$150/year (based on business size)1–5 days (online application)

  2. San Diego Development Services — Contractor Registration

    Contractors pulling permits in San Diego must register with the City of San Diego Development Services Department. The state C-36 license must be verified on file. No separate city plumbing contractor license is required beyond state license verification.

    Official government source

    No additional fee (covered under Business Tax Certificate)1–3 days

Terminus

Open for business — est. $1,200–$3,500 · 3–6 months (dominated by CSLB exam scheduling)

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Official Sources

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