Ohio · Plumbing licensing · official-source guide
Ohio licenses plumbing contractors through the Ohio Construction Industry Licensing Board at the Department of Commerce, and that license covers commercial work. One, two and three family dwellings are excluded from the chapter, so residential plumbing is regulated by cities and counties. Expect five years in the trade, a two part exam passed at 70 percent, and $500,000 of liability insurance.
State-level license
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Verify a licenseVerified against agency sources on 2026-09-11. Rules and fees change; confirm with the named authority before relying on this guide.
The license comes from the Ohio Construction Industry Licensing Board, which sits inside the Division of Industrial Compliance at the Ohio Department of Commerce. The board's own page states it issues licenses to qualified electrical, HVAC, plumbing, hydronics and refrigeration contractors. Those five trades are the whole of its jurisdiction. The board is not one committee. Its 17 members are organised into four sections: Plumbing and Hydronics, HVAC and Refrigeration, Electrical, and Administrative. Each section meets bimonthly. A plumbing application is reviewed by the plumbing and hydronics section, and section 4740.05 of the Revised Code puts the design of the trade examination in the hands of the specialty section that licenses that trade. The credential the board issues is a contractor license, which the board also calls a master license. There is no separate state journeyman plumber license and no state apprentice registration. The board's consumer verification page says as much indirectly by telling homeowners to ask a worker for a journeyman card or an apprenticeship certificate rather than looking one up on the state system. Board correspondence goes to the Ohio Construction Industry Licensing Board, 6606 Tussing Road, PO Box 4009, Reynoldsburg, Ohio 43068-9009, per the board's own application packets. The administrative offices are listed at 77 South High Street, 23rd Floor, Columbus. A license in Ohio belongs to a person, not a company, and then gets attached to a company. Section 4740.07 handles that attachment, and it is the step that surprises contractors moving here from states where the license sits on the business entity.
Sourcescom.ohio.gov 1com.ohio.gov 2com.ohio.gov 3codes.ohio.gov 4com.ohio.gov 5dam.assets.ohio.gov 6codes.ohio.gov 7
Ohio is a two tier state and the tier line is written into the definitions, not into a policy memo. Section 4740.01 of the Revised Code defines a construction project and then excludes from it a residential building as defined in section 3781.06. Section 3781.06 defines a residential building as a one family, two family or three family dwelling house and any accessory structure incidental to that dwelling house. Follow that through and the state plumbing contractor license is a commercial license. The board says the same thing in plain words on its own page: the Ohio contractor licensing law requires building and health departments that have a registration in place to require the state license before issuing commercial permits, and all local building and health departments regulate residential contractors. There is a third clause that matters more than either of the first two. The board's page also states that the licensing law allows those building and health departments to require the state commercial license for their residential contractors. Local authority to demand the state license is real and is exercised. Columbus is the obvious example, because its own contractor licensing page tells plumbing applicants to obtain the state license from the Ohio board before applying to the city. So the accurate sentence is not that residential plumbing in Ohio is unlicensed. It is that residential plumbing is licensed by the city or county, that the city or county may choose to accept nothing less than the state license, and that a contractor working several jurisdictions has to check each one. The state license is the portable one; the local requirement is the one that varies street by street.
Sourcescodes.ohio.gov 1codes.ohio.gov 2com.ohio.gov 3columbus.gov 4
Section 4740.06 sets the qualifications and rule 4101:16-2-01 of the Administrative Code fills them in. An applicant must be at least 18 years of age, must be a United States citizen or a legal alien with valid documentation, must clear a criminal records check, and must not have violated chapter 4740. On experience there are two main doors. The first is five years as a tradesperson in the trade applied for, immediately before the application is filed. The second is the engineer door: a currently registered engineer in Ohio with three years of business experience in the construction industry in that trade. The administrative rule adds detail the statute leaves out. The five years need not be consecutive, and three of the five must be obtained performing construction work on commercial or residential projects. An education program may substitute for up to one year. Uniformed service counts, and section 4740.06 recognises an applicant actively engaged in those activities in the service of the uniformed services for at least three of the five years immediately preceding. Proof is documentary and specific. The rule calls for W-2s or IRS schedule Cs, together with obtained permits, a journeyman card, a certificate of completion of apprenticeship, or training agency certificates. The board's own examination application asks for the last five consecutive years of tax documents. Counter sales, inventory work and general contracting unrelated to the trade do not count. Out of state applicants have a separate packet requiring five years of active licensure elsewhere, at least five construction authorisations, and a tax return or W-2 showing income earned under that license.
Sourcescodes.ohio.gov 1codes.ohio.gov 2dam.assets.ohio.gov 3dam.assets.ohio.gov 4
Rule 4101:16-2-03 of the Administrative Code describes the test in two sentences that settle most of the arguments about it. The examination consists of one part specific to the trade applied for and one part of business and law. An applicant who has attained a score of seventy per cent on each part is deemed to have satisfactorily passed. Seventy on each part, not seventy on the average. Testing is computer based by appointment. The board's application packets state that all licensure examinations are computer based testing by appointment and point candidates to a candidate information bulletin. Results are reported immediately after the exam, and sittings are available at Ohio and nationwide test centres. On the vendor, the board's own site is not internally consistent right now, and a contractor should know that before booking. The board's what we do page says contractors must successfully pass the PSI licensing examination. The Department of Commerce board directory page for the same board says contractors pass the PROV licensing examination. The administrative rule itself names neither and refers only to the approved testing agency. Check the current bulletin the board links from its application before you pay anyone. Sequence matters. The board reviews the application first, and approval is valid for one year. Only after approval does the applicant obtain a BCI and FBI background check, and only then is the examination scheduled. Budgeting time for the background check before booking a seat avoids losing the approval window. Rule 4101:16-2-04 covers issuance of the license to successful applicants once the exam is behind you.
Sourcescodes.ohio.gov 1dam.assets.ohio.gov 2com.ohio.gov 3com.ohio.gov 4dam.assets.ohio.gov 5
Rule 4101:16-2-09 is the whole fee schedule, and it is short enough to read in full. Twenty-five dollars for application for examination. Twenty-five dollars for issuance of any license. Sixty dollars for the annual renewal of each license, and one hundred eighty dollars for the triennial renewal of each license. A late fee of not more than one hundred and twenty dollars for a license not timely renewed. A penalty fee of thirty dollars for any check or draft returned to the board unpaid. Written as figures: $25 to apply to sit the exam, $25 to have the license issued, $60 a year or $180 for three years to renew, up to $120 late, and $30 on a bounced payment. The board's examination application repeats the $25 application fee and tells approved candidates to send a $25 check payable to Treasurer, State of Ohio for issuance. Reciprocity applications carry a $25 non-refundable fee per trade. The rule also prices the continuing education side of the system, which matters if you run your own training. A course application costs ten dollars plus one dollar per credit hour. Course attendance costs one dollar per credit hour per attendee. A training agency application costs twenty-five dollars. Every fee in the rule is nonrefundable and payable to the administrative section of the board. What the rule does not price is the examination itself. The board charges $25 to apply; the testing agency charges separately for the seat, and that number is published in the candidate bulletin rather than in the board's rule.
Sourcescodes.ohio.gov 1dam.assets.ohio.gov 2dam.assets.ohio.gov 3
Rule 4101:16-2-09(D) states the insurance requirement without qualification. Every individual holding a license under chapter 4740, other than one on inactive status, shall maintain contractor's liability insurance in the individual's name, including without limitation complete operations coverage, in an amount of at least five hundred thousand dollars. That is $500,000, and the board's own examination application repeats it as proof of at least $500,000 contractor liability insurance on a certificate of liability insurance. The next sentence of the rule is the one people miss. If the license has been assigned to a business entity under section 4740.07, the liability insurance must be in the name of that business entity, and the entity must be registered with the Ohio secretary of state to do business in Ohio. A policy in your personal name while the license sits on the company is a mismatch the board can act on. Section 4740.07 governs the assignment itself. A licensed individual may request that the license be assigned to a contracting company the individual is employed by, and the license is then issued in the company's name with the individual's name and position stated on it. No license may be assigned to more than one contracting company at a time. The exit rules are tight. The company must notify the board when the contractor stops being associated with it, and the assignment becomes invalid ninety calendar days after the contractor's death or ninety calendar days after a completed change of company form, or earlier by agreement. A company that has another assigned license for the same work type can keep operating on that one.
Sourcescodes.ohio.gov 1dam.assets.ohio.gov 2codes.ohio.gov 3
Rule 4101:16-2-07 sets the renewal conditions: maintain at least five hundred thousand dollars in contractor liability insurance, pay the fee in rule 4101:16-2-09, and complete the continuing education in rule 4101:16-2-08. Miss the date and there is one recovery path. A licensee may file for late renewal within one calendar year after the expiration of the license, meeting the same insurance, fee and education requirements, and paying the late fee of up to $120. Two renewal terms exist. The fee rule prices an annual renewal at $60 and a triennial renewal at $180, and the board's published renewal requirements document sets out the same choice at $60 per license for one year and $180 per license for three years. Three years is not a discount; it is the same $60 a year paid in advance, and it locks in the continuing education obligation for the full term. Inactive status is a separate option, covered by rule 4101:16-2-12. A license may remain in inactive status indefinitely. While inactive, the licensee is relieved of continuing education and of the liability insurance requirement, and may not perform any specialty contracting work. Coming back costs time as well as money. Reactivation requires notice to the specialty section on the board's form, the accumulated continuing education, the reactivation fee of sixty dollars, and contractor liability insurance of at least five hundred thousand dollars back in force. The accumulated education is capped: no more than ten hours for each year inactive, to a maximum of thirty hours, or eight hours per year to a maximum of twenty-four for compliant contractor program members.
Sourcescodes.ohio.gov 1codes.ohio.gov 2dam.assets.ohio.gov 3codes.ohio.gov 4
This is where competitor pages get Ohio wrong, and the error is easy to spot once you read the two rules together. Rule 4101:16-2-08 sets the baseline. Except as provided in rule 4101:16-1-08, a licensee shall complete ten classroom hours of an approved continuing education course each year. For a plumbing, hydronics, HVAC or refrigeration licensee those ten hours may be in any course approved by the specialty sections. Electrical licensees have a split requirement with at least five hours of electrical code. A classroom hour is at least fifty minutes of instruction. Excess hours do not carry forward to the next renewal period, and no more than ten classroom hours may be credited in one calendar day. Rule 4101:16-1-08 is the exception that gets quoted as if it were the rule. It creates the compliant contractor program. Members are entitled to a two hour reduction in their yearly continuing education requirement, which turns ten into eight, and may choose annual renewal with eight hours of continuing education or triennial renewal with twenty-four hours. Membership is earned, not automatic. An individual must demonstrate one year of compliance with chapter 4740, including timely filings, prompt fee payment and no disciplinary history, and must apply on the board's form. The program is open to existing licensees only; a new applicant has to complete a licensing period first. Members can be removed for non-compliance. So eight and twenty-four are real numbers, but they are the program numbers. A newly licensed Ohio plumbing contractor is on ten hours a year until the board admits them to the program. Waivers exist for certified illness, disability, military service, foreign residence or excusable neglect, applied for within one year of expiration.
Section 4740.08 of the Revised Code makes Ohio reciprocity conditional on a written agreement. Where such an agreement exists, an applicant licensed in the other state who submits a copy of the agreement and pays the fee may be licensed without examination, provided the board finds the other state's requirements substantially equal to Ohio's and the other state extends the same treatment to Ohio licensees. Rule 4101:16-2-10 adds a criminal records check and names no states at all. The states live on the board's application pages, and the important detail is that each agreement covers only named trades. As published by the board, the reciprocity applications and the trades on them are: South Carolina for electrical, HVAC and plumbing; Tennessee for electrical, HVAC, refrigeration, plumbing and hydronics; West Virginia under a mechanical reciprocity application covering HVAC and plumbing; Alabama for HVAC, refrigeration and electrical; Kentucky for electrical, HVAC and refrigeration; and North Carolina for electrical only. For a plumbing contractor that narrows to three: South Carolina, Tennessee and West Virginia. Alabama, Kentucky and North Carolina reciprocity does not reach plumbing. The conditions attached are specific. The South Carolina application requires a current South Carolina license in the trade earned by passing South Carolina licensing exams. The Tennessee application requires a current Tennessee license plus proof it was issued after passing the required exam or under Tennessee's grandfathering rules. Each application carries a $25 non-refundable fee per trade. Rule 4101:16-2-10 also limits second chances. A reciprocal licensee who misses both the normal and the late renewal, or who has already used a late renewal, must sit the examination rather than receive another reciprocal license.
Sourcescodes.ohio.gov 1codes.ohio.gov 2com.ohio.gov 3com.ohio.gov 4dam.assets.ohio.gov 5dam.assets.ohio.gov 6
Section 4740.13(A) is one sentence: no person shall act as or claim to be a type of contractor that this chapter licenses unless that person holds or has been assigned a license issued pursuant to this chapter for the type of contractor that person is acting as or claiming to be. Note the phrase claim to be. Advertising the capability is inside the prohibition, not just performing the work. Section 4740.99 supplies the penalty. A violation of section 4740.13(A) is a minor misdemeanor on the first violation and a misdemeanor of the fourth degree on subsequent violations. Section 4740.13(B) adds the civil route. On request of the appropriate specialty section of the board, the attorney general may bring a civil action for relief including a temporary restraining order or permanent injunction, in the court of common pleas of the county where the unlicensed person resides or is acting as or claiming to be a licensed contractor. The practical enforcement is quieter than either of those. Because the board's own page states that building and health departments with a registration in place must require the state license before issuing commercial permits, the usual consequence of being unlicensed is not a court date. It is a permit that does not issue and a job that does not start. Two carve-outs sit in the same section and are worth knowing. A licensed contractor may install, service and maintain related or interfaced control wiring for equipment tied to their license where the wiring is under twenty-five volts. And certain systems operating under fifty volts, among them fire alarm, burglar alarm, cabling, tele-data, sound and communication systems, do not by themselves make a person an electrical contractor.
Ohio writes its advertising rule in more detail than most states, and it is aimed squarely at how a contractor presents the business. Rule 4101:16-2-05 covers display of license. An individual or entity holding a license under chapter 4740 shall display the issued license in a conspicuous place in each office or each place of business of the specialty contractor and each construction site. That is three locations, and the construction site is the one people forget. The license number must appear on business locations, business cards, vehicles containing the name of the specialty contracting business, contracts and advertisements. The rule then specifies the format: OH LIC#, followed by the number. Writing the bare digits, or the number with a different prefix, is not what the rule asks for. Vehicles get their own paragraph. Where a vehicle displays the business name, the license number must be prominently placed on at least two sides of the vehicle, at a minimum height of two inches. Two sides, two inches. A single small decal on the tailgate does not satisfy it. The last paragraph is the one that catches multi brand operators. No license number may be advertised for more than one business name. If you run a plumbing brand and a drain cleaning brand out of the same license, the rule does not allow both to carry that number. None of this is optional presentation advice. Section 4740.13(A) prohibits claiming to be a licensed contractor when you are not, and the display rule defines what claiming it properly looks like.
Columbus runs the deepest local plumbing regime in Ohio, and it is a genuine second credential rather than a registration formality. The Department of Building and Zoning Services issues a Journeyperson Plumber license, and the Board of Review of Plumbing and Sewer Contractors reviews the qualifications of applicants under Columbus City Code section 4114.505 and certifies names to the department for issuance. The requirements are set out on the city's own application form. An applicant needs a minimum of five full years of experience in the plumbing trade installing building services plumbing systems, or completion of a United States Department of Labor Bureau of Apprenticeship Training certified plumbing apprenticeship program. The city's contractor licensing page adds an alternative for a registered Ohio engineer or graduate engineer with at least one year of relevant experience, counted on a basis of 1,600 working hours a year. The examination is the National Standard Journeyman Plumber F25, administered by the International Code Council, and the pass mark is at least 70 percent. A passing score stays valid for one year from the date it was achieved, so the board application has to follow reasonably quickly. Timing is governed by the board calendar. Applications must be submitted no later than seven days before the board meeting. The fee is in the city's Combined Development Related Fee Schedule. The schedule effective January 22, 2026 lists the Journeyperson Plumber annual fee at $150, and the Sewer, Water, Sewer/Water Contractor annual fee at $350 with prior approval required from Public Utilities.
Sourcescolumbus.gov 1columbus.gov 2columbus.gov 3columbus.gov 4
Holding the state plumbing contractor license does not by itself let you pull a permit in Columbus. The city's contractor licensing page lists an OCILB Contractor registration as its own category, covering electrical, HVAC, refrigeration, hydronics and plumbing contractors, and states that those trades require state licensure through the Ohio Construction Industry Licensing Board before applying to the city. The city's OCILB Contractor Application sets out what to submit. The application itself, completed and signed by the OCILB license holder. A bond in the amount of $25,000, on the city's form and with the amount unaltered. A current OCILB license, with the city registration then assigned to the name of the business entity exactly as it appears on the state license. And the registration fee from the Contractor License and Registration Fees section of the fee schedule. The name matching requirement is the one that sends applications back. The individual and company names on the bond, the state license and the application all have to agree. Columbus also issues other licenses a plumbing business may need alongside the registration, including Sewer, Water or Combined Sewer and Water Contractor, which needs prior approval from the Department of Public Utilities, and Fire Contractor. General Contractor, Sewer and Water Contractor and Fire Contractor registrations each carry a $25,000 bond. The Board of Review of Plumbing and Sewer Contractors also adjudicates matters involving a department registered OCILB licensed plumbing contractor, a licensed journeyperson plumber, a department registered backflow technician and a department registered fire protection company. The city, not the state, hears those.
Sourcescolumbus.gov 1columbus.gov 2columbus.gov 3columbus.gov 4
The other two large Ohio metros run lighter systems than Columbus, and they run them differently from each other. Cleveland requires registration with the city on top of the state license. The Department of Building and Housing states that plumbing contractors must have a master plumber or sewer builder bond, must be licensed and insured with the state, and must be registered with the city. Do-it-yourselfers do not have to be registered. The city's broader contractor page repeats the shape of it: contractors must be bonded, insured and registered, and electricians and plumbers must also be licensed. Cleveland's permit triggers are broad. Permits are required for all code violation corrections and power-assisted sewer cleaning, for new, extended or repaired gas service, for water service and plumbing systems and fixtures, and for new or replaced water heaters. Plumbing, sewer and gas piping systems may also need water permits from the Division of Water at a separate office on Lakeside Avenue. Homeowners can verify a contractor's registration by phone. Cincinnati registers contractors under Municipal Code chapter 1106 and renews registration annually. The published cost is $125.00 plus a 3 percent technology surcharge, a 1 percent financial recovery fee and a 1 percent training surcharge, for a total of $131.25 per year. The city applies a useful rule for state licensees: a state licensed contractor's registration is valid until the state license expires, while everyone else gets one year from issuance. Cincinnati exempts owners of one to three family dwellings doing their own work where they will occupy the property for at least a year afterwards, and licensed architects and engineers acting within their scope.
The board runs a public eLicense lookup and points consumers at it directly. The individual licensee search takes a name or a license number, and defaults to Ohio as the state of residence. The board also publishes a current licensee listing, a downloadable roster covering the electrical, HVAC, hydronics, plumbing and refrigeration trades. The board's verification page gives homeowners an eight step routine, and it is worth reading as a contractor because it tells you what a prepared customer will ask. It tells them to check state licensing and notes that the commercial trades regulated in Ohio are electrical, HVAC, plumbing, hydronics and refrigeration. It tells them to ask individual workers for journeyman cards or apprenticeship certificates, since those are not on the state system. It tells them to contact the local building department to confirm local licensing and permit requirements, and says refusal to obtain permits is a red flag. It tells them to request proof of insurance and verify the coverage is active, to ask for recent references from similar projects, to read the contract for scope, materials, timeline, payment schedule and warranties, to be cautious of large down payments, and to treat high pressure sales, no references, no permits and unusually low bids as warning signs. Two things follow for a licensed contractor. Keep the company name on the state record identical to the name on the truck and the estimate, because a search that returns nothing reads as unlicensed. And expect the insurance question early, since the board tells customers to ask for proof and to verify it rather than accept a certificate at face value.
Sourcescom.ohio.gov 1elicense4.com.ohio.gov 2elicense4.com.ohio.gov 3
These are common details other guides publish about Ohio, but we could not verify them from the agency source. Confirm them directly before relying on them.
Ohio licenses plumbing contractors for commercial work through the Ohio Construction Industry Licensing Board at the Department of Commerce. Section 4740.01 of the Revised Code excludes residential buildings from the construction projects the chapter covers, and section 3781.06 defines a residential building as a one, two or three family dwelling. Residential plumbing is regulated by cities and counties.
Not by the state statute itself, but often by the city. The board's own page says all local building and health departments regulate residential contractors, and that the licensing law allows those departments to require the state commercial license for their residential contractors. Columbus, for one, requires the state license before a plumbing contractor may register with the city.
Five years as a tradesperson in the trade immediately before applying, under section 4740.06. A registered Ohio engineer with three years of business experience in the construction industry in that trade qualifies instead. Rule 4101:16-2-01 allows the five years to be non consecutive and lets an education program substitute for up to one year.
Rule 4101:16-2-03 states the examination has one part specific to the trade and one part of business and law, and that a score of seventy per cent on each part is a pass. Seventy on each part separately, not an average. Testing is computer based by appointment with results reported immediately.
The board's own pages currently give two answers. The what we do page says contractors must pass the PSI licensing examination; the Department of Commerce board directory page says the PROV licensing examination. The administrative rule refers only to the approved testing agency. Check the candidate bulletin linked from the board's own application before booking.
Rule 4101:16-2-09 sets $25 to apply for the examination and $25 for issuance of the license. Renewal is $60 a year or $180 for three years. A late fee of up to $120 applies to a license not timely renewed, and a returned payment carries a $30 penalty fee. The testing agency charges separately for the seat.
At least $500,000 in contractor liability insurance including complete operations coverage, under rule 4101:16-2-09(D), and the board's examination application asks for a certificate showing it. Where the license is assigned to a business entity, the policy has to be in that entity's name and the entity must be registered with the Ohio secretary of state.
Ten classroom hours a year is the baseline under rule 4101:16-2-08, and a classroom hour is at least fifty minutes. Members of the compliant contractor program get a two hour reduction under rule 4101:16-1-08, so they do eight a year, or twenty-four across a three year renewal. Excess hours do not carry forward.
Through the compliant contractor program in rule 4101:16-1-08. It requires one year of demonstrated compliance with chapter 4740, including timely filings, prompt fee payment and no disciplinary history, and an application on the board's form. It is open to existing licensees only, so a new applicant serves a licensing period first.
Based on the reciprocity applications the board publishes, plumbing is covered by agreements with South Carolina, Tennessee and West Virginia. The Alabama, Kentucky and North Carolina agreements cover other trades. Section 4740.08 requires a written agreement, and rule 4101:16-2-10 adds a criminal records check and names no states itself.
Rule 4101:16-2-05 requires the number on business locations, business cards, vehicles carrying the business name, contracts and advertisements, in the format OH LIC# followed by the number. On vehicles it must be on at least two sides at a minimum height of two inches. The license itself must be displayed at each office, place of business and construction site.
Not as far as the advertising rule allows. Rule 4101:16-2-05 states that no license number may be advertised for more than one business name. Section 4740.07 points the same way on the licensing side, since no license may be assigned to more than one contracting company at a time.
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