Ohio Plumbing License — How to Get Licensed at the State and City Level

Ohio Does Not Have a Single Statewide Plumbing License

Most plumbers looking up "Ohio plumbing license" expect one application, one test, one card. That is not how Ohio works. The state runs a bifurcated system where two entirely separate authorities control different slices of the trade.

The Ohio Construction Industry Licensing Board (OCILB), housed under the Department of Commerce's Division of Industrial Compliance, issues only one plumbing credential: the Commercial Plumbing Contractor license. This license covers bidding, contracting, and performing plumbing on commercial and multi-family structures statewide. It is governed by Ohio Revised Code Chapter 4740.

Residential plumbing — single-, two-, and three-family dwellings — falls entirely under local jurisdiction. Cities like Columbus, Cleveland, Cincinnati, and Toledo maintain their own journeyman and master plumber exams, registration fees, and bonding requirements. There is no statewide journeyman or master plumber license in Ohio.

If you want to do both commercial and residential work across multiple cities, you need the state OCILB license and local registrations in every municipality where you pull permits.

The State Commercial Contractor License (OCILB)

The OCILB commercial plumbing contractor license is the closest thing Ohio has to a statewide "master" credential. Here is the path from application to active license:

Experience requirement: Five years of verified trade experience under a licensed plumbing contractor. The OCILB requires your last five consecutive years of W-2 tax forms and at least one matching plumbing permit pulled per year. Schedule C or K-1 records work for self-employed applicants. Alternatively, you can qualify with an active municipal journeyman card or by completing 40 hours of live/webinar code courses from an OCILB-approved provider within one year of applying.

Application: Submit the notarized OCILB exam application packet with your experience documentation and a $25 non-refundable application fee. The board reviews applications on a bimonthly cycle.

Background check: Electronic fingerprinting through an approved Webcheck location, processed by the Ohio Bureau of Criminal Investigation (BCI) and FBI. Cost runs $50–$75. Results must go directly to the Division of Industrial Compliance and are valid for one year — if your application stalls, you may need to redo fingerprints.

State exams: PSI Services administers both tests. The Trade Exam is 100 questions with a 4-hour time limit. The Business and Law Exam is 50 questions with a 2-hour limit. Both require a 70% passing score. Scheduling both in a single session costs $100 ($69 each if taken separately). Open-book format using approved references — tabs and highlighting are allowed, but personal handwritten notes on reference pages are not.

License issuance: After passing both exams, submit proof of general liability insurance (minimum $500,000, naming the OCILB as certificate holder) and pay the $25 license issuance fee. The license typically arrives within two business days.

Total upfront cost: Roughly $200–$225 for the state license alone, not counting insurance premiums.

Municipal Registration — The Other Half

Holding the OCILB license does not automatically let you pull permits anywhere. Each municipality requires you to register your state credential locally, and many add their own fees and bonds:

• Columbus: $350 registration fee plus a $25,000 surety bond
• Cleveland: $150 registration fee ($120 renewal), a $25,000 bond, and $200,000 in liability insurance naming the city as additional insured
• Cincinnati: $131.25 registration fee (includes tech, recovery, and training surcharges)
• Canton: $75 application fee, $150 annual registration, and a $10,000 bond
• Hamilton County: $10,000 performance bond to pull permits

If you work across multiple metro areas, these local fees add up fast. Budget accordingly.

Renewal and Continuing Education

The OCILB offers annual ($60) or triennial ($180) renewal options. Annual renewal requires 8 hours of continuing education; triennial requires 24 hours. There is a hard cap on self-paced online CE: a maximum of 4 hours per year (12 hours for a three-year renewal). The remaining hours must come from live or webinar instruction.

Missing your renewal deadline triggers a $30 late fee. If your license lapses for more than one year, you must reapply from scratch — new application, new background check, new exams.

What To Do Next

Ohio's split system means most plumbers need to navigate both state and local requirements, and the rules differ by city. The Ohio Plumber License Guide consolidates the full process — OCILB application, city-by-city registration requirements, fee schedules, and insurance checklists — into a single reference so you can focus on the work instead of the paperwork.

See more Ohio guides →