Plumber License Guide for Every State in 2024

Within the U.S., there are variations on what’s needed to obtain a plumber license. This includes differences in cost and who issues the license in each state.

Whether you are a plumbing business owner who works with apprentices or are a plumber in training, it’s important to understand the licensing requirements in your state or region!  

Some states allow transferring a license from specific other states, this is called reciprocity. Others require licensed plumbers from other states to start fresh and apply for a unique license for that state.

This complete guide will provide:

  • An overview of every U.S. state’s requirements for quick reference
  • A link to each state’s issuing body for a plumber license
  • Notice of testing requirements to receive a plumber license
  • Any costs required when applying in each state

Plumber License Requirements by State

State Issuing Body Exam Required Reciprocity Agreement Costs
Alabama Alabama Plumbers & Gas Fitters Examining Board Yes N/A Application Fee: $35-175
Alaska Regulation Of Mechanical Administrators Yes N/A Application Fee: $150

License Fee: $200

Arizona Arizona Registrar of Contractors Yes N/A Application Fee: $100-$200

License Fee: $270-$580

Arkansas Arkansas Department of Health – Plumbing & Natural Gas Yes N/A Application Fee: $0-$150

License Fee: $25-$200

California Contractors State License Board Yes Yes Application Fee: $450

License Fee: $200-$350

Colorado Colorado Division of Professions and Occupations, Plumbing Board Yes N/A Online Portal
Connecticut Department of Consumer Protection Yes N/A License Fee: $90-$150
Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners Yes Yes License Fee: $163
Florida Department of Business and Professional Regulation Yes N/A Application Fee: $145-$245
Georgia State Construction Industry Licensing Board, Division of Master and Journeyman Plumbers Yes No Application Fee: $30-$50
Hawaii Professional Vocational Licensing – Board of Electricians and Plumbers Yes Yes Application Fee: $40
Idaho Division of Building Safety Yes Yes Application Fee: $22.50-$50
Illinois Illinois Department of Public Health Yes Yes Application Fee: $175-$225
Indiana Indiana Plumbing Commission Yes Yes Application Fee: $30-$50

License Fee: $50-$100

Iowa Iowa Plumbing and Mechanical Systems Board Yes Yes Application Fee: $25

License Fee: $50-$240

Kansas No Statewide Plumbing Licensing* N/A N/A N/A
Kentucky Department of Housing Buildings and Construction Yes N/A Journeyman License: $60

Master License: $250

Louisiana State Plumbing Board of Louisiana Yes Yes Exam Fee: $135

Application Fee: $75

Maine Office of Professional and Occupational Regulation Yes N/A License Fee: $200

Criminal Background Check Fee: $21

Maryland Maryland Board of Plumbing Yes Yes Application Fee: $15-$70
Massachusetts The Board of Registration of Plumbers and Gas Fitters Yes N/A Exam Fee: $31

License Fee: $52

Michigan Department of Licensing and Regulatory Affairs Yes N/A License Fee: $40
Minnesota Department of Labor and Industry Yes Yes Application Fee: $50
Mississippi Mississippi State Board of Contractors Yes Yes Application Fees: $50-$400
Missouri No Statewide Plumbing Licensing* N/A N/A N/A
Montana Montana Board of Plumbers Yes Yes Application Cost: $270
Nebraska No Statewide Plumbing Licensing* N/A N/A N/A
Nevada Nevada Board of Plumbing Examiners Yes N/A Application Fee: $125
New Hampshire Mechanical Safety and Licensing Board Yes N/A Application Fee: $90-$310
New Jersey State Board of Examiners of Master Plumbers Yes Yes Application Fee: $100
New Mexico Mechanical Plumbing Bureau Yes N/A N/A
New York No Statewide Plumbing Licensing* N/A N/A N/A
North Carolina State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors Yes N/A License Fee: $150
North Dakota North Dakota State Plumbing Board Yes N/A License Fee: $25-$150
Ohio Ohio Construction Industry Licensing Board Yes N/A Application Fee: $50
Oklahoma Construction Industries Board Yes Yes Application Fee: $75-$330
Oregon Building Codes Division Yes Yes Application Fee: $100
Pennsylvania No Statewide Plumbing Licensing* N/A N/A N/A
Rhode Island Division of Professional Regulation Yes N/A Application Fee: $72-$240
South Carolina Contractor’s Licensing Board Yes Yes Application Fee: $350
South Dakota South Dakota Plumbing Commission Yes Yes Application Fees: $10-$375
Tennessee Department of Commerce and Insurance Yes N/A Application Fee: $75
Texas Texas State Board of Plumbing Examiners Yes N/A License Fee: $35
Utah Division of Occupational and Professional Licensing Yes Yes Application Fee: $116
Vermont Department of Public Safety, Division of Fire Safety Yes N/A Application Fee: $50-$120
Virginia Department of Professional and Occupational Regulation Yes Yes Application Fee: $130
Washington Washington State Department of Labor and Industries Yes Yes Exam Fee: $189.80

Certification Fee: $227.90

West Virginia Division of Labor Yes Yes Application Fee: $25-75
Wisconsin Department of Safety and Professional Services Yes N/A License Fee: $180
Wyoming No Statewide Plumbing Licensing* N/A N/A N/A

*For the states without a statewide plumbing licensing, you’ll still need a license. The issuer would be a regional or local office within the state where you intend to operate.

Also, if you’re looking to fill out your team with licensed plumbers, download our FREE Plumbing Hiring Guide for all of the best recruiting tips!

What To Expect in a Plumber License Exam 

Plumber license exams typically cover a range of topics to assess candidates’ knowledge and competency in plumbing-related tasks. Topics covered may include:

  • Plumbing codes and regulations
  • Plumbing systems and components
  • Pipe installation and repair
  • Blueprint reading
  • Water heaters and plumbing fixtures
  • Backflow prevention
  • Gas piping and venting
  • Drainage systems
  • Plumbing tools and equipment
  • Safety and OSHA regulations

Below are some sample questions you might encounter in a plumber license exam:

  • Question: Provide examples of essential plumbing tools and explain how each tool is used in various plumbing tasks.
  • Question: Why is backflow prevention important in plumbing systems, and what are the common methods used to prevent backflow?
  • Question: Outline the safety measures and regulations associated with installing gas piping and venting systems in residential and commercial buildings.

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Plumber License Wrap Up

Now, you know the requirements for every state’s licensing requirements. Refer back as we update this frequently. After reading this guide you have a better handle on:

  • Where to find your state’s website  
  • Each state’s requirements
  • Testing requirements and associated costs
  • Sample topics and questions found on plumbing exams

 

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