Do you need a license to work as a plumber in Idaho?
Yes. In Idaho, engaging in the business, trade, practice or work of plumbing requires passing an examination and holding a state certificate of competency, which is not transferable. A person who owns or is buying a single-family or duplex dwelling may do the plumbing work in it, its accessory buildings and grounds without a certificate, but must follow the state’s minimum plumbing standards. Sewer, sewage disposal, excavating and utility contractors and their employees, as defined in the exceptions section, do not need the certificate. This is Idaho Code §§ 54-2602, 54-2610.
| What | Idaho |
|---|---|
| Plumber license | State certificate of competency (plumbing) |
Source
Idaho Code §§ 54-2602, 54-2610
Read the statute in the Idaho Statutes (Idaho Legislature): legislature.idaho.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
- Georgia
- Hawaii