Plumbing Contractor Permit Requirements in Warwick, RI

Complete permit and license guide for starting a plumbing contractor in Warwick, Kent County, Rhode Island.

Updated 2026-03-15 5 stops $400–$1,200 est. 4–10 weeks to obtain all licenses
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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 or corporation. Free from the IRS.

    Official government source

    FreeImmediate (online application)

State of Rhode Island

1 stop

  1. Rhode Island Division of Taxation — Sales Tax Permit

    Required for all businesses selling tangible personal property or taxable services in Rhode Island. Rhode Island charges a 7% state sales tax with no local sales taxes. Register with the RI Division of Taxation online via the RI Tax Portal.

    Official government source

    FreeImmediate (online)

City of Warwick / Kent County

3 stops

  1. Rhode Island Board of Examiners of Plumbers and Gasfitters — Master Plumber License

    Plumbing contractors in Rhode Island must hold a Master Plumber License. Requires apprenticeship experience and passing a state exam.

    Official government source

    $100–$200 (initial)4–8 weeks

  2. City of Warwick City Clerk — Business License

    Warwick requires a Business License for regulated businesses within city limits. The City Clerk processes license applications and renewals. This license must be renewed annually and displayed at your place of business.

    Official government source

    $50–$500/year depending on business type and gross revenues1–3 weeks

  3. Kent County / Warwick Plumbing Permit (per project)

    A separate permit must be pulled with the local building/plumbing department for each job. Inspections are required upon job completion.

    Official government source

    $50–$300 per project1–5 business days

Terminus

Open for business — est. $400–$1,200 · 4–10 weeks to obtain all licenses

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Official Sources

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