Do you need a license to work as a plumber in Ohio?
Yes. In Ohio, a contractor doing plumbing work on a commercial construction project must hold a plumbing contractor license from the Ohio construction industry licensing board, though one-, two- and three-family homes are outside the state license. The chapter’s "construction project" excludes a residential building, which Ohio Rev. Code § 3781.06 defines as a one-, two- or three-family dwelling house and its accessory structures, so residential plumbing licensing is left to local governments. The board also licenses hydronics contractors. This is Ohio Rev. Code §§ 4740.01, 4740.13, 3781.06.
| What | Ohio |
|---|---|
| Plumber license | State contractor license (commercial work only) |
Source
Ohio Rev. Code §§ 4740.01, 4740.13, 3781.06
Read the statute in the Ohio Revised Code (Ohio Legislative Service Commission): codes.ohio.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.
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The same question in other states
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