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    Title: Master Plumber License
    Alternate Title:
    Description: Minnesota Department of Labor and Industry (DLI)
    Subject: Plumbers
    Creation Date: 9/11/2008 2:16:15 PM
    Modification Date: 9/3/2026 11:08:19 AM
    Agency Name: Labor and Industry (DLI), Minnesota Department of
    Agency URL: http://www.dli.mn.gov
    Agency Description: The agency ensures Minnesota’s work and living environments are equitable, healthy and safe. The agency oversees the state's programs for apprenticeship, construction codes and licensing, dual-training pipeline, occupational safety and health, wage and hour standards, workers' compensation and youth skills training programs. The Office of Combative Sports, within the Department of Labor & Industry, ensures Minnesota's combative sporting events are conducted in a manner that minimizes injuries and ensures fair competition.
    Agency Phone: 651-284-5005
    Agency Fax: Agency URL: http://www.dli.mn.gov
    Agency Address:
    443 Lafayette Road N.

    St. Paul
    MN 55155

    Division Name: Construction Codes and Licensing Division (CCLD)
    Division URL: http://www.dli.mn.gov/about-department/our-areas-service/construction-codes-and-licensing
    Division Description:
    Division Phone: Division Fax: Division URL: http://www.dli.mn.gov/about-department/our-areas-service/construction-codes-and-licensing
    Unit Name: Licensing and Certification Services
    Unit URL:
    Unit Description:
    Unit Phone: 651-284-5034
    Unit Fax: Contact person(s): dli.license@state.mn.us
    Unit URL:
    Audience: Hold Application URL: https://www.dli.mn.gov/ims
    Renewal URL: https://www.dli.mn.gov/ims
    Versa URL:
    Requirements: Review:


    Plumbers
     

    Plumbing License Types and Credentials

    Who can perform plumbing work in Minnesota


    You can perform plumbing work in Minnesota if you are:

    • At least 18 years old

    • Licensed with the Minnesota Department of Labor and Industry (DLI) or registered with DLI as a registered unlicensed plumber, or enrolled in a DLI-registered apprenticeship program.

    • A W-2 employee of a licensed plumbing contractor or registered plumbing employer.

    • A licensed owner or officer of a licensed plumbing contractor or restricted plumbing contractor.


    You can perform plumbing work without a license only if:

    • You are registered with DLI as a registered unlicensed plumber or enrolled in a registered apprenticeship program.

    • Your work falls under the scope of the work your employer is authorized to perform.

    • Your work is directly supervised at all times by a licensed journeyworker or master plumber.

    Master plumber license

    You must pass a written exam before you can apply for a master plumber license. To take the master plumber exam you must:

    • Have been licensed as a journeyworker plumber for at least one year; or

    • A current master plumber license from another state where the requirements of the licensing jurisdiction are equivalent to those of Minnesota as determined by DLI; or

    • A current Minnesota restricted master plumber license and five years of verifiable experience in business as a plumbing contractor in Minnesota.


      How to apply to take a plumber license exam

    • Apply online to take the exam and pay the $50 exam fee.

    • Once approved you will receive instructions about how to schedule the exam. View more information about exams. If you do not pass the exam you must wait 30 days before reapplying

    • Once you have passed the exam you will be given instructions on how to pay for your license.

    To renew your license:
    Rules: 4715.3140

    Statutes: 326.40

    Forms:
    Fees:
    Go to Payment Center

    Period of Issuance:


    Length of Determination:

    Exam applications will be received between January 1 and February 15 for the March exam; and between July 1 and August 15 for the September exam. License renewal forms are sent out in October, and due by December 31. Should be returned by December 1 to assure having license by the end of the year.

    Other Info:
    Activity: Plumbers
    License Detail URL:

    Plumbers

    License and Registration Lookup

    Minnesota Department of Labor & Industry (DLI)

         


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