To legally perform plumbing work in Minnesota, you must be licensed or registered with the Department of Labor and Industry (DLI). The state provides distinct pathways for every career stage, from a Registered Unlicensed Plumber just starting out to a Master Plumber operating a contracting business. This guide details the specific requirements for each license tier, including experience, exams, fees, and renewal.
Do You Need a Plumbing License in Minnesota?
Yes, a state-issued license or registration is required to perform plumbing work in Minnesota. The Minnesota Department of Labor and Industry (DLI) oversees the licensing and regulation of plumbers to ensure work meets state code and safety standards.
Scope of Regulated Plumbing Work
Plumbing work regulated by the DLI generally includes the installation, alteration, repair, and maintenance of plumbing systems, fixtures, and appliances. The specific scope of work you are permitted to perform is determined by your license tier, from working under supervision as a Registered Unlicensed Plumber to designing and overseeing complex installations as a Master Plumber. The legal basis for this regulation is established in Minnesota Statutes, chapter 326B.
Consequences of Unlicensed Work
Performing plumbing work without the proper license or registration is a violation of state law. Penalties for unlicensed work can include significant fines and other disciplinary actions from the DLI. It is crucial for both public safety and your professional career to be properly licensed before offering or performing any plumbing services in Minnesota.
Minnesota Plumbing License Types and Tiers
Minnesota has a tiered licensing structure that allows for career progression as you gain experience and pass required examinations.
Registered Unlicensed Plumber (PA-Registration)
- Purpose and Scope: This is the entry-level registration for individuals starting in the plumbing trade. Registered Unlicensed Plumbers must work under the direct supervision of a licensed Journeyworker or Master Plumber. This registration is the first step in documenting the practical experience required to become a licensed Journeyworker.
- Registration Requirements: Applicants must submit an application to the DLI and pay the required fee.
Journeyworker Plumber
- Purpose and Scope: A licensed Journeyworker Plumber is authorized to perform plumbing work under the general supervision of a Master Plumber. This is the primary license for experienced plumbers who have completed their initial training and passed the state exam.
- Experience Requirements for Journeyworker License: Applicants must meet one of the following criteria to be eligible to take the Journeyworker exam:
- Completion of a registered plumbing apprenticeship program.
- Holding a Restricted Master Plumber license and five years of verifiable experience as a plumbing contractor.
- Sufficient plumbing work experience as a Registered Unlicensed Plumber.
- A current plumber's license from another state where the licensing jurisdiction requires at least four years of practical plumbing experience and an examination.
Master Plumber
- Purpose and Scope: A Master Plumber license authorizes an individual to design, install, and supervise all types of plumbing work. This is the highest level of technical license for an individual plumber and is required to oversee the work of Journeyworker and Registered Unlicensed Plumbers. A Master Plumber license is a prerequisite for becoming a Plumbing Contractor.
- Experience Requirements for Master Plumber License: Applicants must meet one of the following criteria to be eligible to take the Master Plumber exam:
- Have been licensed as a Minnesota Journeyworker Plumber for at least one year.
- Hold a current Master Plumber license from another state with equivalent licensing requirements.
- Hold a current Minnesota Restricted Master Plumber license and have five years of verifiable experience as a plumbing contractor in Minnesota.
Restricted Master Plumber
- Purpose and Scope: This license is limited in scope and typically applies to individuals working in specific settings, such as single-family dwellings or for a single employer. The scope of work is more limited than that of a full Master Plumber.
- Experience Requirements for Restricted Master Plumber License: The specific experience requirements are set by the DLI; confirm the current pathway with the DLI before applying.
Plumbing Contractor (Business Registration)
- Purpose and Scope: This is a business registration, not an individual license. A Plumbing Contractor is a business entity that can offer plumbing services to the public. The business must employ at least one licensed Master Plumber to oversee all plumbing work.
- Requirements for Contractor Business Registration: The business must register with the DLI, employ a responsible Master Plumber, and provide proof of a surety bond and general liability insurance.
Backflow Prevention Certification (Specialty)
- Purpose and Scope: This is a specialized certification for testing and rebuilding backflow prevention devices.
- Certification Requirements: Requirements for this specialty certification are published by the DLI; confirm the current requirements with the board before applying.
How to Get Your Minnesota Plumbing License: A Step-by-Step Guide
The path to licensure in Minnesota is a clear progression that involves gaining documented experience, applying for an exam, and submitting your final license application.
Step 1: Meet Experience Requirements by License Tier
- Pathway for Registered Unlicensed Plumber: Submit the registration application and fee to the DLI to begin legally working and accruing experience under supervision.
- Pathway for Journeyworker Plumber: Gain at least four years (approximately 7,000 hours) of practical plumbing experience. This is most commonly achieved through a registered apprenticeship program but can also be met through other DLI-approved pathways.
- Pathway for Master Plumber: You must first be licensed as a Journeyworker Plumber for at least one year before you can apply for the Master Plumber exam.
Step 2: Apply to Take the Minnesota Plumbing Exam
- Exam Application Process: Applicants must apply online with the DLI to receive approval to take the exam for their desired license (Journeyworker or Master).
- Exam Provider and Scheduling Instructions: The exam is administered by the DLI. Once your application is approved, you will receive instructions on how to schedule your exam.
- Exam Fee Structure: The exam fee is $50.
Step 3: Prepare for and Pass Your DLI Plumbing Exam
- Exam Content Overview: The exam covers the Minnesota Plumbing Code, general plumbing theory, and practical installation knowledge.
- Passing Score Requirement: A passing score is 70%.
- What to Do if You Fail the Exam: The DLI's published rules set the policy for retaking the exam; confirm the current re-examination procedure with the DLI.
Step 4: Submit Your License Application
- Required Documentation: After passing the exam, you will submit your final application for licensure. This may include proof of passing the exam, experience verification forms, and other documents as required by the DLI.
- Initial License Application Fees:
- Registered Unlicensed Plumber: $14
- Journeyworker and Master Plumber: The initial license fees are set by the DLI. Confirm the current fees with the DLI before submitting your application.
Step 5: Fulfill Plumbing Contractor Business Requirements (If Applicable)
- Obtain General Liability Insurance: Plumbing contractors must file a Certificate of Insurance for general liability with the DLI.
- File a Surety Bond: A surety bond must be filed with the commissioner.
- Complete Business Registration with DLI: Submit the application for a Plumbing Contractor registration along with proof of insurance, bond, and designation of a responsible Master Plumber.
How Long Does It Take to Get a Plumbing License in Minnesota?
The timeline to obtain a plumbing license in Minnesota varies significantly by tier, ranging from immediate registration for unlicensed plumbers to several years of verifiable experience for Journeyworker and Master Plumber licenses.
- Timeline for Registered Unlicensed Plumber: Registration can be completed quickly upon submission of a complete application and fee.
- Timeline for Journeyworker Plumber: This path requires a minimum of four years of documented practical experience.
- Timeline for Master Plumber: This requires an additional year of experience as a licensed Journeyworker Plumber after meeting the initial four-year requirement.
Renewing Your Minnesota Plumbing License
Maintaining your plumbing license in Minnesota requires timely renewal and completion of continuing education.
Renewal Cycle and Deadlines by License Type
- Journeyworker and Master Plumber: Licenses expire on December 31 of odd-numbered years, making it a biennial (two-year) renewal cycle.
- Registered Unlicensed Plumber: Registrations expire annually on June 30.
- Plumbing Contractor: Business registrations are on a biennial cycle.
Continuing Education (CE) Requirements
- Journeyworker and Master Plumber: A total of 16 hours of DLI-approved continuing education is required per two-year renewal cycle. At least 8 hours must be related to the State Plumbing Code.
- Registered Unlicensed Plumber: A total of 2 hours of DLI-approved continuing education is required for each annual renewal.
- Approved CE Course Providers: The DLI maintains a list of approved providers and courses for continuing education.
Renewal Fees and Late Penalties
Renewal fees are set by the DLI and must be paid by the expiration date to avoid penalties.
- Journeyworker Plumber Renewal Fee: $53 (Late fee: $20)
- Master Plumber Renewal Fee: $93 (Late fee: $40)
- Registered Unlicensed Plumber Renewal Fee: $19
Renewal Process with the MN DLI
The renewal process is managed by the DLI's licensing unit. Licensees typically receive a renewal notice and can complete the process online, attesting to their completion of CE and paying the required fee.
Minnesota Plumbing License Reciprocity and Endorsement
Minnesota's DLI grants plumbing licensure by reciprocity or endorsement to applicants from other states whose licensing requirements are deemed equivalent to Minnesota's, though specific criteria apply.
Reciprocity for Journeyworker Plumbers
To qualify for a Journeyworker license by reciprocity, an applicant's home-state license must have required at least four years of practical plumbing experience and a written examination.
Reciprocity for Master Plumbers
The DLI may grant a Master Plumber license by reciprocity to applicants from another state if the DLI determines that state's requirements are equivalent to Minnesota's.
Application Process for Reciprocity
To apply for reciprocity, you must submit an application to the DLI demonstrating that you meet the state's requirements. The DLI License Unit can provide details on the specific documentation needed. The state does not publish a standing list of reciprocal states; eligibility is determined on a case-by-case basis. For current procedures, contact the DLI License Unit at dli.license@state.mn.us or 651-284-5034.
Minnesota Plumbing License Requirements
How do I become licensed as a plumber in Minnesota?
To become a licensed plumber in Minnesota, you must first register as an Unlicensed Plumber and gain at least four years of practical experience. After meeting the experience requirement, you must apply for, take, and pass the Journeyworker Plumber exam administered by the DLI. After holding a Journeyworker license for at least one year, you can apply to take the Master Plumber exam.
How do I become a registered unlicensed plumber in Minnesota?
You can become a Registered Unlicensed Plumber by submitting an application and the $14 initial application fee to the Minnesota Department of Labor and Industry (DLI). This registration allows you to work and gain experience under the supervision of a licensed plumber.
What are the different types of plumbing licenses in Minnesota?
Minnesota has several tiers: Registered Unlicensed Plumber (entry-level), Journeyworker Plumber, Master Plumber, Restricted Master Plumber, and Plumbing Contractor (a business registration). There is also a specialty certification for Backflow Prevention.
Who can perform plumbing work in Minnesota?
Only individuals who are licensed as a Journeyworker or Master Plumber, or registered as an Unlicensed Plumber working under direct supervision, can legally perform plumbing work in Minnesota.
Minnesota Plumbing Exam and Fees
How do I apply to take a plumber license exam in Minnesota?
You must submit an online application to the Minnesota DLI to get approval to take the exam. Once approved, the DLI will provide instructions on how to schedule your exam.
How much does the Minnesota plumbing license exam cost?
The exam fee for both the Journeyworker and Master Plumber exams is $50.
What topics are covered on the Minnesota plumbing exams?
The exams cover the Minnesota Plumbing Code (based on the 2018 UPC with state amendments), plumbing theory, and installation practices.
What are the renewal fees for Minnesota plumbing licenses?
The renewal fee is $53 for a Journeyworker Plumber, $93 for a Master Plumber, and $19 for a Registered Unlicensed Plumber.
Minnesota Plumbing License Renewal and Continuing Education
How do I renew my Minnesota plumbing license?
You can renew your license with the DLI, typically through an online portal. You must have completed your required continuing education hours and pay the renewal fee before your license expires.
When do I need to renew my Minnesota plumbing license?
Journeyworker and Master Plumber licenses must be renewed every two years by December 31 of odd-numbered years. Registered Unlicensed Plumber registrations must be renewed annually by June 30.
What are the continuing education requirements for plumbers in Minnesota?
Journeyworker and Master Plumbers need 16 hours of CE per two-year renewal cycle, with at least 8 hours on the State Plumbing Code. Registered Unlicensed Plumbers need 2 hours of CE for their annual renewal.
Minnesota Plumbing Contractor and Reciprocity
What are the insurance requirements for plumbing contractors in Minnesota?
Plumbing contractors must file a Certificate of Insurance for general liability with the DLI. The minimum coverage amount is set by Minnesota Rules; confirm the current amount with the DLI before applying.
Do I need a bond to be a plumbing contractor in Minnesota?
Yes, plumbing contractors are required to file a surety bond with the DLI. The bond amount is set by state rule and should be verified with the DLI.
Which states have plumbing license reciprocity with Minnesota?
Minnesota does not maintain a fixed list of reciprocal states. The DLI evaluates applicants from other states based on whether their home state's licensing requirements (experience and exam) are equivalent to Minnesota's. Contact the DLI License Unit for guidance on your specific situation.