Ohio licenses plumbing contractors at the state level, but it does not issue a state journeyman or residential plumber license. A plumbing license in Ohio, at the state level, means the commercial plumbing contractor license from the Ohio Construction Industry Licensing Board (OCILB). Journeyman cards and residential plumber licensing are handled locally by cities and counties, so the rules change depending on where you work.
Who issues the license
The Ohio Construction Industry Licensing Board sits inside the Ohio Department of Commerce, Division of Industrial Compliance. It issues state licenses to commercial contractors in five trades: electrical, HVAC, hydronics, plumbing, and refrigeration.
The law behind it is Ohio Revised Code Chapter 4740, and the board’s rules are in Ohio Administrative Code 4101:16.
Here’s the part that trips people up. The state license is aimed at commercial work, but the board says local building departments may require it for residential work too. And the state doesn’t license the plumbers who work for you. That’s local, so call the building department before you take a job.
Requirements change, so always confirm with the Ohio Construction Industry Licensing Board before you apply. This page is a plain-English guide, not legal advice.
License types
- State plumbing contractor license (OCILB). This is the only plumbing license the state issues. It’s held by an individual and assigned to one contracting company. You need it to contract commercial plumbing work in Ohio.
- Local journeyman and residential licenses. There is no statewide journeyman license. Many cities and counties run their own plumber testing, registration, or journeyman cards. Rules, fees, and exams vary by jurisdiction, so check with the local building department.
- Inactive (escrow) status. If you’re current, you can park your state license in escrow. You skip CE and insurance while it’s inactive, but you still pay a $60 renewal fee every year.
One rule to know: everyone working under your license has to be on your W-2 payroll or come through a recognized temp agency. Pay someone on a 1099 and the board says they need their own state license.
How to become a plumber in Ohio
Since there’s no state journeyman license, the path has two tracks. You get trained and carded locally, then you go for the state contractor license once you have the years in.
- Step 1: Get your training. Start in an apprenticeship or under a licensed plumbing contractor, and get any local card your city or county requires.
- Step 2: Build 5 years of experience. Under ORC 4740.06, you need at least five years as a tradesperson in plumbing immediately before you apply. The other route is being a registered engineer in Ohio with three years of business experience in the construction industry in the trade.
- Step 3: Prove it. The board wants your last five years of W-2s, Schedule C, or Schedule K-1. You also need one of these: five consecutive years of permits from the company on your tax documents, a valid journeyman card, a certificate from an Ohio-approved apprenticeship or U.S. Department of Labor program, or 40 hours of live or webinar CE from an OCILB-approved provider dated within one year of applying. Self-paced courses don’t count for that 40.
- Step 4: Meet the basics. Be at least 18, be a U.S. citizen or legal alien with proof of status, and have no disqualifying conviction. The board publishes its list of disqualifying offenses.
- Step 5: Get approved, then background checks. After the board approves you, you complete BCI and FBI background checks before you can sit the exam. Those results are only good for one year.
- Step 6: Pass the exams and get insured. Pass both PSI exams, then show at least $500,000 in contractor liability insurance in your company’s name.
Exams
PSI runs the OCILB exams on computer. Once you’re approved, you get PSI’s bulletin and book two exams:
- Ohio Plumbing Contractor exam. 100 scored questions, 4 hours, open book. References include the 2024 Ohio Plumbing Code and the 2024 International Fuel Gas Code.
- Contractor’s Business and Law exam. 50 scored questions, 2 hours, open book, using the NASCLA Contractor’s Guide to Business, Law, and Project Management for Ohio.
You need 70 percent to pass each one. If you fail, ORC 4740.06 says you can retest no sooner than 60 days after your last attempt. After five attempts, you have to reapply before you can test again.
Renewal
Under ORC 4740.06, state contractor licenses expire every year on the date of your original license. You can submit your renewal up to 90 days before it expires. Renew online through the Ohio eLicense system, and get it in by the expiration date to dodge a late fee. You don’t send proof of insurance with renewals anymore, but you still have to keep that $500,000 in coverage.
Continuing education is where the official sources don’t line up perfectly. ORC 4740.04 and OAC 4101:16-2-08 say 10 hours a year. The board’s compliant contractor program (OAC 4101:16-1-08) cuts that to 8 hours for annual renewals, or 24 hours if you qualify to renew every three years. The board’s own page simply says all trades need 8 hours for a one-year renewal or 24 for a three-year renewal. Check your renewal notice or call the board to be sure which number applies to you.
Annual renewers can take up to 4 hours self-paced online, and three-year renewers up to 12. If your license has been expired more than one year, you have to reapply and retest.
Cost
Fees from OAC 4101:16-2-09 and the PSI bulletin:
- Application for exam: $25 per trade, paid to the board.
- PSI exam fee: $69 per registration, and you pay it again for each retake.
- License issuance: $25 once you pass.
- Annual renewal: $60.
- Triennial renewal: $180, for those in the compliant contractor program.
- Late renewal: up to $120.
- Escrow (inactive) renewal: $60 a year.
- Background checks: BCI and FBI checks are required through a WebCheck location. The board doesn’t publish what those cost, so ask the location.
- Insurance: at least $500,000 in contractor liability coverage with complete operations.
All board fees are nonrefundable. Local journeyman cards and city registrations have their own fees, which the state doesn’t set.
Reciprocity
Ohio does have written reciprocity for plumbing contractors. OAC 4101:16-2-10 allows a license without the exam for someone licensed in a state with a written agreement and substantially equal requirements. The OCILB contractors page lists these plumbing partners:
- Arkansas. Plumbing.
- Mississippi. Plumbing, Business and Law exam required.
- South Carolina. Plumbing, Business and Law exam required.
- Tennessee. Plumbing, Business and Law exam required.
- West Virginia. Plumbing. The board’s West Virginia form asks for a West Virginia master plumber license plus a West Virginia contractor license, earned by testing.
Reciprocity only covers people who passed the state-recognized test. You’ll need a notarized reciprocity application, a verification form signed by the other state’s board, and a $25 fee per trade. From any other state, you’ll most likely sit the Ohio exams through the out-of-state testing application. See our plumbing license reciprocity by state guide for how others compare.
How to apply
- Get the right form. Applications and forms are in the eLicense system and on the OCILB contractors page. The application has to be notarized.
- Watch the deadline. Applications are due two weeks before the plumbing section’s meeting, or they roll to the next one.
- Send your proof. Five years of tax documents, one supporting item from Step 3, and the $25 fee.
- Insurance certificate. Include a certificate of insurance naming OCILB as certificate holder, or a letter asking for inactive status.
- Background checks, then test. After approval, do your BCI and FBI checks and book your PSI exams.
FAQ
Does Ohio have a state journeyman plumber license?
No. The state only licenses plumbing contractors through OCILB. Journeyman and residential licensing is local, so check with your city or county.
How long does it take to get an Ohio plumbing contractor license?
You need five years as a plumbing tradesperson right before you apply. Then add time for board approval, background checks, and the two PSI exams.
How much does the Ohio plumbing contractor license cost?
Plan on $25 to apply, $69 for PSI, and $25 for the license. Renewal is $60 a year. Insurance and background checks are extra.
Can I transfer my plumbing license to Ohio?
Yes, if you’re from Arkansas, Mississippi, South Carolina, Tennessee, or West Virginia and earned your license by testing. Otherwise you’ll apply to take the Ohio exams.
Next steps
Call your local building department to see what you need where you live, then start logging years toward the state license. To compare Ohio with other states, see our plumbing license by state page, the full plumbing license guide, and plumbing license cost by state. Working near the border? Check the Indiana plumbing license page too. Ready to run your own shop? Read how to start a plumbing business.
