Michigan Journeyman Plumber Requirements

Michigan's journeyman plumber credential represents the intermediate licensing tier within the state's structured plumbing qualification framework, sitting between apprentice status and the full Michigan Master Plumber Requirements. Administered by the Michigan Department of Licensing and Regulatory Affairs (LARA), this license authorizes holders to perform plumbing work under the supervision of a licensed master plumber. The requirements encompass apprenticeship hours, examination standards, and continuing obligations that define this credential's scope across residential, commercial, and industrial settings.

Definition and scope

A journeyman plumber in Michigan is a licensed trades professional who has completed a state-recognized apprenticeship and passed a qualifying examination administered through LARA's Bureau of Construction Codes. The credential is distinct from a Michigan Plumbing Contractor Licensing classification — journeyman status certifies individual craft competency, not business authorization to contract plumbing work independently.

The journeyman license is issued under authority of the Michigan Plumbing Act (Public Act 733 of 2002), which establishes the statutory foundation for all plumbing licensure in the state. Under this framework, a journeyman plumber may legally install, alter, repair, and replace plumbing systems, provided that work occurs under the responsible oversight of a licensed master plumber.

Scope and coverage limitations: This page covers Michigan state licensing requirements exclusively. Requirements from neighboring states — Indiana, Ohio, Wisconsin, and Minnesota — do not apply to Michigan licensees, and Michigan journeyman credentials are not automatically reciprocal with those states. Federal EPA or OSHA plumbing-adjacent regulations (such as lead service line standards) represent a separate compliance layer and are not governed by LARA's plumbing licensure program. Municipal variations, such as Detroit's local enforcement authority, fall within Michigan's state framework but may impose supplemental inspection requirements beyond what this page describes.

For broader context on how this credential fits within Michigan's full regulatory structure, see Regulatory Context for Michigan Plumbing.

How it works

Qualification for a Michigan journeyman plumber license follows a sequential process with defined eligibility thresholds:

Apprenticeship completion — Applicants must document a minimum of 8,000 hours of supervised plumbing work experience, typically accumulated through a registered apprenticeship program. Programs registered with the U.S. Department of Labor's Office of Apprenticeship, such as those operated by UA Local unions in Michigan, satisfy this requirement. Hours must be verified by a licensed master plumber or an approved apprenticeship sponsor.
Application submission — Candidates submit a completed application to LARA's Bureau of Construction Codes along with documentation of work hours, identity verification, and the applicable examination fee. LARA's current fee schedule is published on the Bureau of Construction Codes portal.
Examination — The journeyman exam tests knowledge of the Michigan Plumbing Code (based on the International Plumbing Code with state amendments), pipe sizing, drainage and venting principles, water supply systems, and code-compliant fixture installation. The examination is administered through LARA's approved testing vendor.
License issuance — Upon passing the examination, LARA issues the journeyman plumber license. The license is valid for 3 years and requires renewal, which includes continuing education obligations described under Michigan Plumbing Continuing Education.
Ongoing compliance — Licensed journeyman plumbers must maintain compliance with Michigan Plumbing License Renewal requirements and remain current with any code updates issued through the Bureau of Construction Codes.

Journeyman plumbers working on permitted projects must coordinate with the licensed master plumber of record, who carries permit responsibility. The permit process itself is described in detail at Michigan Plumbing Permit Process.

Common scenarios

Journeyman plumbers in Michigan operate across a defined range of project types, each with specific supervisory and permitting implications.

Residential new construction: A journeyman plumber on a new single-family home installation works under a master plumber who holds the permit. The journeyman performs rough-in, drain-waste-vent (DWV) assembly, water supply rough-in, and fixture setting. Inspection checkpoints — rough-in inspection and final inspection — are triggered by the master plumber's permit. See Michigan Plumbing for New Construction for code-specific requirements.

Remodel and renovation work: In kitchen and bathroom remodels, journeyman plumbers handle fixture replacement, supply line reconfiguration, and drain modifications. These projects typically require permits when structural plumbing changes occur. Full scope is covered at Michigan Plumbing Remodel and Renovation.

Commercial and multi-family settings: Journeyman plumbers frequently work on Michigan Plumbing for Multi-Family Housing projects and commercial installations, where Michigan Commercial Plumbing Standards apply. In these environments, a journeyman may oversee apprentices directly while remaining under the master plumber's permit authority.

Specialty systems: Work involving Michigan Gas Line Plumbing Regulations, Michigan Backflow Prevention, or Michigan Lead Pipe Replacement Requirements may carry additional certification requirements beyond the base journeyman license.

Decision boundaries

The journeyman credential defines clear boundaries relative to other license categories within Michigan's plumbing hierarchy.

Credential	Permit Authority	Independent Contracting	Supervision Required
Apprentice	None	No	Master or Journeyman
Journeyman Plumber	None (permit holder must be Master)	No	Master Plumber
Master Plumber	Yes	Yes (with contractor license)	None

A journeyman plumber cannot pull permits independently, cannot operate as a plumbing contractor, and cannot supervise other journeyman plumbers without master plumber oversight on permitted work. The path from journeyman to master plumber requires additional documented experience hours and a separate, more comprehensive examination — details available at Michigan Master Plumber Requirements.

Journeyman plumbers seeking to understand the full credential landscape, from first entry into the trade through Michigan Plumbing Apprenticeship Programs to advanced licensure, can reference the overview at the Michigan Plumbing Authority index.

Safety obligations for journeyman plumbers are not discretionary. Work on water supply systems must conform to Michigan's cross-connection control standards (Michigan Cross-Connection Control Program), and installations must meet accessibility requirements under Michigan Accessibility Plumbing Requirements. Violations and enforcement actions fall under LARA's disciplinary authority, as described at Michigan Plumbing Violations and Penalties.

References

📜 3 regulatory citations referenced · 🔍 Monitored by ANA Regulatory Watch · View update log