Plumbing Contractor Permit Requirements in Warwick, RI

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

Verified 2026-09-06 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. Key agencies and fees on this page were re-checked against official government sources on .

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 DLT Board of Examiners of Plumbers - Master Plumber License

    Plumbing contractors in Rhode Island must hold a Master Plumber license issued by the RI Department of Labor and Training's Professional Regulation unit (Board of Examiners of Plumbers and Irrigators). RI DOH does not license plumbers, and the Contractors' Registration and Licensing Board directs plumbing applicants to DLT. Requires documented apprenticeship hours and passing the state exam.

    Official government source

    $75 non-refundable application/exam processing fee, plus a $240 two-year license fee for Master Plumber, invoiced after a passing score of 70 or better. Journeyperson Plumber is $75 plus a $72 one-year fee.Not published by DLT; the license fee is invoiced after the exam is passed.

  2. No General Business License in Warwick

    Warwick issues no general business license or business tax certificate. The city's Licensing Division, administered through the Warwick Police Department and filed on the city's OpenGov portal, licenses only specific activities - liquor, second class victualler, inside and outside entertainment, food truck/cart/trailer, general and produce peddlers, daily vendor, kennel, massage therapy, permanent make-up, second hand dealer, used car dealer, tobacco, private detective, laundromat, dry cleaners and similar. Mobile dog grooming appears nowhere in that catalogue, and Rhode Island has no state grooming license.

    Official government source

    No fee - Warwick issues no general business license, and neither Warwick nor the state licenses dog grooming.Not applicable - no general business license is issued.

  3. City of Warwick Building Department - Plumbing Permit (per project)

    A plumbing permit must be pulled from the Warwick Building Department for each job, filed through the city's OpenGov permitting portal. Rhode Island counties have no government, so there is no Kent County plumbing permit. Inspections are required upon job completion.

    Official government source

    Valuation-based: $10 per $1,000 up to $10,000; $100 + $8 per $1,000 from $10,001-$50,000; $420 + $6 per $1,000 above $50,000. $75.00 minimum fee, plus the Rhode Island CE/ADA surcharge.Not published by the city.

Terminus

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

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