Short answer
Check two things. First, the contractor's Ohio license from the Ohio Construction Industry Licensing Board, which licenses plumbing contractors. Second, the City of Columbus registration that every contractor needs before applying for permits. The city's Citizen Access Portal lets you search licensed and registered contractors, and BZS answers at 614-645-7433.
Key facts
- Columbus requires all contractors to hold the appropriate City license or registration before applying for permits, under City Code chapter 4114.[1]
- Columbus journeyperson plumber applicants need 5 full years in the trade or a certified apprenticeship, and a score of 70% or higher on the National Standard Journeyman Plumber F25 exam.[1]
- The City of Columbus Citizen Access Portal offers a search for licensed and registered contractors.[2]
Step 1: Check the Ohio license
The Ohio Construction Industry Licensing Board (OCILB), part of the Ohio Department of Commerce, licenses contractors in five trades: plumbing, electrical, HVAC, hydronics and refrigeration[3][4]. The board's licenses apply to commercial work, and it explains that local building and health departments regulate residential contractors and may choose to require the state license for residential work too[3].
Columbus does require it. To register with the city as a plumbing contractor, a business must first hold a current Ohio license in that trade[1]. Ask for the Ohio license number and look it up through the Ohio Department of Commerce.
Step 2: Check the City of Columbus registration
Columbus regulates contractors under City Code chapter 4114, run by Building and Zoning Services (BZS). The city's rule is that every contractor working in Columbus must hold the appropriate City license or registration before applying for permits[1].
How to check:
- Online: BZS lists "Search for licensed and registered contractors" as a service of its Citizen Access Portal (portal.columbus.gov/permits/)[2].
- By phone or in person: BZS customer service, 614-645-7433, [email protected], 111 N Front Street, Monday to Friday, 9 a.m. to 4 p.m.[2]
If a company cannot be found in the city system, it cannot pull your water heater permit. In Columbus, replacing a hot water tank requires one[2].
Step 3: Ask who will do the work
The license on the truck is the company's. The person in your basement may be someone else. Columbus licenses individual journeyperson plumbers separately. The city's requirements[1]:
| Columbus journeyperson plumber license | Requirement[1] |
|---|---|
| Experience | 5 full years in the plumbing trade, or a certified plumbing apprenticeship (U.S. Department of Labor Bureau of Apprenticeship Training) |
| Exam | National Standard Journeyman Plumber F25, passing score 70% or higher |
| Exam score validity | One year, unless a license application has been made |
| Approval | Skilled Trades Review Board |
It is fair to ask whether the installer holds a City journeyperson license or works under someone who does.
What about Columbus suburbs?
Each suburb keeps its own list. Two examples:
| City | Rule | Source |
|---|---|---|
| Hilliard | The city publishes a list of registered contractors, listed by trade | [6] |
| Grove City | Contractor registration is required before any work can be performed | [7] |
For Dublin, Westerville, Gahanna, Reynoldsburg, Upper Arlington, Delaware and Newark, ask the city building department how it registers plumbing contractors. We have not verified those rules.
What a license check does not tell you
A license and a City registration show that a company may legally pull the permit. They do not show how well it installs water heaters. Round out the check:
- Ask for the permit number once it is issued, and confirm the final inspection was scheduled and passed.
- Ask what the price includes: haul-away of the old tank, new connectors and valves, an expansion tank if needed, and the permit itself.
- Ask about the warranty split. The tank warranty comes from the manufacturer; the labor warranty comes from the installer. Get the labor term in writing.
- Get the model number on the quote so you can compare quotes on the same heater.
Your right to cancel a contract signed at home
If you sign a water heater contract at your home, for example after a door-to-door sales visit, Ohio's Home Solicitation Sales Act lets you cancel until midnight of the third business day after you sign. The seller must give you a written contract with a cancellation notice and a cancellation form[5]. Read the cancellation notice before you sign.
Red flags when hiring
- The company asks you to pull the permit in your own name.
- No Ohio license number or City registration can be given on request.
- The quote does not mention a permit or inspection at all.
- Pressure to sign the same day for a non-emergency replacement.
- A price that only holds if you skip the permit.
When to call a pro
- Your water heater is leaking from the tank body or the relief valve is releasing hot water: call a licensed plumber now and shut off the water supply to the heater.
- You smell gas near the heater: leave the house and call your gas utility or 911 from outside.
- You want a replacement quote that includes the Columbus permit and inspection.
- A previous installer left work that failed inspection or was never permitted.
More questions
Is a handyman allowed to replace a water heater in Columbus?
Not as a licensed plumbing contractor unless they hold one. Columbus treats water heater replacement as permitted work, and only a contractor holding the right City license or registration can apply for permits. A handyman without an Ohio plumbing license and City registration cannot pull that permit.
What is the difference between a plumbing contractor and a journeyperson plumber in Columbus?
The contractor is the business that holds the Ohio license and City registration and pulls the permit. A journeyperson plumber is an individual tradesperson, and Columbus requires a separate City license to work at that trade.
Does Ohio license residential plumbers statewide?
The Ohio Construction Industry Licensing Board licenses plumbing contractors, mainly for commercial work. It says local building and health departments regulate residential contractors and may require the state license for them. Columbus does, through its OCILB contractor registration.
Sources
- Contractor Licenses, City of Columbus, Building and Zoning Services. Accessed 2026-10-14.
- Typical Residential Projects (BA 3/26), City of Columbus, Building and Zoning Services. Accessed 2026-10-14.
- Ohio Construction Industry Licensing Board, Ohio Department of Commerce. Accessed 2026-10-06.
- Ohio Revised Code 4740.01, Construction industry licensing board definitions, Ohio Legislative Service Commission. Accessed 2026-10-06.
- Ohio Revised Code 1345.23, Home solicitation sale agreement and notice of cancellation, State of Ohio. Accessed 2026-10-06.
- Questions and Answers (contractors), City of Hilliard. Accessed 2026-10-06.
- Solicitor and Contractor Information, City of Grove City. Accessed 2026-10-06.
Water Heater Facts is an information and referral service run by Strive LeadGen LLC. We may be paid by contractors when we connect a homeowner with one; that never changes what we publish. Found an error? Tell us. We review safety and legal reports within 2 business days and all others within 7 days.