Plumbing Contractor License Requirements in Michigan

Overview — plumbing licensing in Michigan

Michigan requires a state-level plumbing contractor license, issued by the Michigan Department of Licensing and Regulatory Affairs (LARA), Bureau of Construction Codes. The license verifies competence and consumer protection, and is required to legally bid and perform plumbing work in the state. Working without one when required is typically a misdemeanor and exposes the contractor to civil penalties — and the contract becomes unenforceable in court.

License classes available

Michigan offers 2 plumbing license classes — pick based on the largest project you plan to bid:

• Master Plumber. Required to operate a plumbing contracting business or be the responsible master.
• Journey Plumber. Performs plumbing under master supervision.

Experience required

Journey: 8,000 hours (4 years) of registered apprentice experience. Master: Journey + 2 additional years + business management exam.

Exam — what you're tested on

Michigan requires a written examination administered by PSI Services on behalf of LARA. Topics covered:

• IPC + MI amendments
• Calculations
• Business law

Passing score: 75%.

Fees

• Application fee: $50
• Initial license fee: $50
• Renewal fee: $50 ( triennial)

Bond & insurance

Bond: Not required at the state level.

General liability insurance: Minimum $500,000.

Workers' compensation: Required for any MI employer.

Continuing education

Michigan requires 15 hours of continuing education every 3 years. CE must come from approved providers — verify a course is approved before paying. Required topics typically include:

• IPC updates
• MI code
• Safety

Reciprocity with other states

Michigan does not have formal plumbing reciprocity with other states. Out-of-state contractors must complete the Michigan process from scratch.

Local permits and requirements

Most MI cities require plumbing permits. Detroit, Grand Rapids, Ann Arbor each have their own building department.

Common gotchas

Things that catch most applicants on their first license cycle in Michigan:

• Apprentice registration mandatory — informal training doesn't count.
• Master path: Journey + 2 years journey + business exam — multi-year process.
• Triennial renewal cycle — easy to miss CE accumulation across 3 years.
• No reciprocity — every MI plumber earned their license through the MI process.

Frequently asked questions

What's the difference between Michigan Journey and Master plumber?

Journey performs plumbing under master supervision. Master operates a business and pulls permits. Master takes a harder trade exam plus a business management exam.

How many hours does Michigan apprenticeship require?

8,000 hours of documented work as a registered apprentice. Apprentice must register with LARA within 60 days of starting work.

Why doesn't Michigan have plumbing reciprocity?

Michigan has historically required all plumbers to go through MI's apprentice/journey/master pipeline. The state amended IPC enough that out-of-state licensees often need substantial Michigan-specific code education.

How long does Michigan plumbing licensing take total?

Apprentice: 4 years. Journey exam: 1–3 months. Journey-to-Master: 2 years + exam. Total Master timeline: 6–7 years.

What CE counts for Michigan's 15-hour plumbing requirement?

LARA-approved providers. Michigan Plumbing & Mechanical Contractors Association and several community colleges run approved CE.