Do you need a license to work as a plumber in Montana?
Yes. In Montana, anyone working in the field of plumbing as a master or journeyman plumber must first obtain a state plumbing license. The field of plumbing covers the installation, removal, alteration or repair of plumbing and drainage systems. A licensee must carry the license or proof of licensure while working on a job site. The statute lists permanent and temporary exceptions in Mont. Code Ann. § 37-69-102. This is Mont. Code Ann. §§ 37-69-301, 37-69-101.
| What | Montana |
|---|---|
| Plumber license | State master or journeyman plumber license |
Source
Mont. Code Ann. §§ 37-69-301, 37-69-101
Read the statute in the Montana Code Annotated (Montana Legislature): leg.mt.gov.
Checked against the statute on November 13, 2026.
This is a summary of a published statute, not legal advice. Rules change, local ordinances can add to them, and the terms of a specific lease may differ. Check the citation and speak to a lawyer before acting.
How Seayora uses this rule
A contractor on Seayora keeps each license with its issuing state, its expiry date and the last four digits of its number, and the business is warned before one lapses — on the website and both phone apps. A customer finding a pro on Seayora sees whether a license is on file.
Guides on this rule
- Contractor License Requirements by State: Every Trade — Which states require a state license for electricians, plumbers, HVAC, general and home improvement contractors, with the statute for each.
Compare this rule in every state
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The same question in other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- District of Columbia
- Florida
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- Hawaii