Yes: Ohio requires a state license for plumbing contracting, but not for plumbing work itself.
The state issues no journeyman or master plumber license; the only statewide credential is the Ohio Construction Industry Licensing Board (OCILB) Plumbing Contractor license, which covers commercial work.
Earning it takes five years of trade experience, a 70% pass on PSI's trade and business-and-law exams, and $500,000 in liability insurance.
Residential plumbing answers to local building and health departments.
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At a glance
At the contractor level only.
The OCILB Plumbing Contractor license covers commercial work statewide; Ohio issues no journeyman or master plumber license.
The Ohio Construction Industry Licensing Board (OCILB) under the Department of Commerce's Division of Industrial Compliance; local building and health departments regulate residential plumbing.
Plumbing Contractor and Hydronics Contractor, separate licenses under OCILB's plumbing and hydronics section.
No journeyman or master plumber level exists at the state level.
Five years as a tradesperson in the trade immediately before applying; OCILB accepts a journeyman card, an approved apprenticeship certificate or 40 hours of approved code CE as experience evidence.
PSI administers a trade part and a business-and-law part, each passed at 70%; a passed business-and-law part counts for three years toward another trade.
$60 a year or $180 for three years; OCILB currently publishes 8 hours of CE for one-year renewals and 24 hours for three-year renewals.
Ohio's plumbing list: Arkansas, Mississippi, South Carolina, Tennessee and West Virginia.
OCILB's eLicense Center at elicense4.com.ohio.gov, plus a downloadable current licensee roster.
The state's only plumbing license: issued to an individual, assigned to one contracting company at a time, and covering commercial plumbing work.
A separate OCILB trade license issued by the same plumbing and hydronics section.
Yes, for contracting work β and no, for plumbing work itself.
Ohio has no state journeyman or master plumber license for individual workers; the state issues only the OCILB plumbing contractor license, which Ohio law defines as a license issued to an individual as an HVAC, refrigeration, electrical, plumbing or hydronics contractor.
That state license covers commercial work: OCILB regulates commercial contractors, while local building and health departments regulate residential contractors and may choose to require the state license for residential work.
Ohio law also lets cities, districts and agencies register tradespersons β including plumbing and hydronics workers β and charge them a registration or license fee, so some localities may require worker registration; our research did not verify which cities do.
On job size, our research found no minimum dollar threshold in the licensing statute; the license is required to act as, or claim to be, a licensed-trade contractor on commercial projects.
β"Licensed trade" means a trade performed by a heating, ventilating, and air conditioning contractor, a refrigeration contractor, an electrical contractor, a plumbing contractor, or a hydronics contractor.β
Ohio's state plumbing credentials are both contractor licenses: the Plumbing Contractor license and the separate Hydronics Contractor license, both issued under OCILB's plumbing and hydronics section, which has primary responsibility for licensing both trades.
There is no journeyman or master plumber license at the state level.
The license belongs to the individual and is assigned to one contracting company at a time, with OCILB's 90-day rule governing a change of company.
Below the contractor level, worker credentials are local: state law lets cities, districts and agencies register tradespersons and charge them a registration or license fee, so where you work can add a registration requirement of its own.
There is one state license to qualify for, the Plumbing Contractor license, and it follows the OCILB standard: be at least 18 and a U.S. citizen or legal alien, and have at least five years as a tradesperson in the trade immediately before applying β or an Ohio-registered engineer's route with three years of trade business experience, or other experience the section accepts.
OCILB accepts a journeyman card, an Ohio- or USDOL-approved apprenticeship completion certificate, or 40 hours of approved code continuing education as alternative experience evidence, and education other than an approved apprenticeship can replace at most one of the five years.
The exam application costs $25 and license issuance another $25, and licensees must carry at least $500,000 in contractor liability insurance.
βA tradesperson with at least five years of experience in the trade for which the license is being applied immediately prior to the date the application is filed.β
PSI administers OCILB's contractor exams, including the plumbing trade exam.
The exam has two parts: one specific to the trade you applied for and one on business and law, and you must pass each part at 70%.
A passed business-and-law part counts toward another trade license for three years, so a plumber who later adds the hydronics license does not immediately repeat it.
Our research does not describe the exam's content outline, and PSI's exam fee was not verified; ask for the candidate information when OCILB approves your exam application.
βThe two parts shall consist of: one part that is specific to the trade to which the applicant has applied, and one part of business and law.β
Plumbing contractor licenses renew on the OCILB cycle: $60 for one year or $180 for three years, with a late fee of up to $120.
For continuing education, OCILB's website currently states 8 hours for one-year renewals and 24 hours for three-year renewals; the rule text itself requires 10 classroom hours of approved CE each year, with a two-hour reduction for licensees in the Compliant Contractor Program.
A license can also go into inactive (escrow) status indefinitely: while in escrow you pay the $60 renewal fee annually but owe no CE and no insurance, and reactivating takes up to 24 hours of CE plus proof of insurance.
Confirm the current CE count with OCILB before you renew.
βWhile in escrow you do not need to take CE each year or maintain liability insurance, but you must pay the $60 renewal fee annually.β
Yes, with a specific list.
Ohio's OCILB plumbing reciprocity covers Arkansas, Mississippi, South Carolina, Tennessee and West Virginia, and OCILB's page notes that Mississippi, South Carolina and Tennessee applicants must also pass the business-and-law exam.
The list is as Ohio publishes it; if your state is not on it, confirm with OCILB how your out-of-state license, experience and exams translate before you plan on a shortcut.
OCILB runs the eLicense Center at elicense4.com.ohio.gov and posts a downloadable current licensee roster covering the electrical, HVAC, hydronics, plumbing and refrigeration trades.
Because Ohio's only plumbing license is the contractor license, the lookup verifies contractors rather than individual plumbers.
Search it before you hire a contractor, or before you take a job with a company that claims licensed status.
This page summarizes the Ohio board pages, statutes, rules and other sources listed below, as read for this state-by-state plumbing licensing series, current as of September 2026.
It is not a substitute for the instructions the Ohio Construction Industry Licensing Board (OCILB) publishes.
For the rest of the picture in Ohio, see HVAC licensing in Ohio, plumbing apprenticeships in Ohio, plumbing contractor licensing in Ohio, and plumber pay in Ohio.
From the 24 active plumber listings on HVACHires as of October 7, 2026.
Source: active plumber listings on HVACHires, updated daily. Pay figures use only listings that state pay (midpoint of each posted range), hourly and yearly counted separately. Benefits count listings that name the benefit; a listing that doesnβt mention one may still offer it.
Browse 24 jobs βNo. Ohio issues no state journeyman or master plumber license for individual workers; the only statewide plumbing credential is the OCILB Plumbing Contractor license.
Ohio law does let cities, districts and agencies register tradespersons and charge a registration or license fee, so a local registration may exist where you work β check with your city or county building department.
Not necessarily a state one.
The state OCILB license covers commercial work; local building and health departments regulate residential contractors, and they may choose to require the state commercial license for residential jobs.
What applies depends on the city or county, so check with the department where the work is done before you bid.
State fees are $25 for the exam application and $25 for license issuance, then $60 per year for renewal or $180 for a three-year renewal, with a late fee of up to $120.
PSI charges its own exam fee, which our research did not verify, and you must carry at least $500,000 in liability insurance, paid to your insurer rather than the board.
Ohio's OCILB plumbing reciprocity covers Arkansas, Mississippi, South Carolina, Tennessee and West Virginia, and OCILB notes that Mississippi, South Carolina and Tennessee applicants must also pass the business-and-law exam.
If your state is not on the list, contact OCILB directly to confirm how to qualify.
Sources
Sourced from the documents listed above.
Verified September 2026.
This is career information, not legal advice.
Confirm current rules with the Ohio Construction Industry Licensing Board (OCILB).