How to check a contractor license in Ohio

Ohio has no statewide license for general or residential contractors. The Ohio Construction Industry Licensing Board licenses electrical, HVAC, plumbing, hydronics and refrigeration contractors for commercial work, and you can search them in its license lookup. For a home project, ask your city or county building department whether the contractor is licensed or registered there.

How do I check a contractor license in Ohio?

Start with the city or county, then use the state lookup for the trades. Ohio leaves residential contractors to local governments, so the state search only helps when the job includes electrical, HVAC, plumbing, hydronics or refrigeration work.

Call the building department for the city or county where the house is. Ask whether it licenses or registers contractors, and whether the job needs a permit.
For electrical, HVAC or plumbing work, open the Ohio Construction Industry Licensing Board (OCILB) license lookup. We last checked this lookup on 2026-10-19.
Pick the license type, then search by credential number or by first and last name. You can narrow the search by state or county.
If you only know the company, use the "Lookup Licensee by Employer" link on the same page to find the licensed person who works there.
Open the credential detail. Confirm the license is active and that the name matches the person or business on your contract.

The OCILB is part of the Ohio Department of Commerce. If the name on the license record doesn't match the name on the contract, ask the contractor about it before any work starts.

Does Ohio require a general contractor license?

No. Ohio Revised Code Chapter 4740 licenses only HVAC, refrigeration, electrical, plumbing and hydronics contractors, and its definition of a construction project leaves out residential buildings. Rules for contractors who work on homes are set locally, and they differ from one city to the next.

The state does put one limit on those local rules. Under section 4740.12, a city or county that makes contractors register and pay a fee must also require them to hold the state license for their trade. Your building department can tell you what it requires for the job in front of you.

How do I look up an electrician license in Ohio?

Use the OCILB license lookup and pick the electrical license type. The lookup covers five contractor credentials: EL for electrical, HV for HVAC, HY for hydronics, PL for plumbing and RE for refrigeration.

A residential electrician with no state license may still hold a local one, so ask the building department that covers the address before you rule anyone out. The lookup can also generate rosters of licensees if you'd rather work from a full list than search one name at a time.

What does an Ohio license lookup not tell you?

It doesn't tell you whether the work will be any good. A state record shows a credential and its status, and it says nothing about a remodeler or a roofer, because Ohio doesn't license them. Ask for a current certificate of insurance and references from recent jobs, and get the permit number once the building department issues one.

A job near a state line can involve a contractor based next door, so check that state's records too. The lookups for Pennsylvania, West Virginia, Kentucky, Indiana and Michigan are on their own pages.

Other states handle this very differently, and the guide on how to check a contractor license, state by state covers each one. This article is general information, not legal advice. Rules change, so confirm details with the OCILB or your local building department.

Sources

Agents can keep these contractors in Proferral

Proferral is a free app real estate agents use to keep a go-to list of the providers they trust and to remember every referral they send. Its license checks cover Oregon and Washington only, so for Ohio you still run the lookup above by hand. Here's how Proferral's license checks work.

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