Independent guide. We are not a plumbing company and do not do plumbing work. Toledo requires plumbing contractors to be registered with the City. Check any plumber on the City's registered-contractor list.

Check before you hire

Toledo Plumbing Contractors: How to Check Registration and License

Page date: November 15, 2026.

Anyone can buy a truck decal or a web ad that says "plumbing." In Toledo, that is not enough to do the work legally. This page explains what the City and the State of Ohio require of plumbing contractors, how to check both in a few minutes, and what else to confirm before work starts.

What Toledo requires

City registration. Toledo Municipal Code 1311.01(a) reads, in part: no person, firm or corporation shall "advertise by means of business cards, stationery, advertisement or trade or telephone listing or otherwise indicate or represent, orally or in writing, that he, she, they or it are in the electrical, plumbing, warm air heating and air conditioning or refrigeration business or trade, unless he, she, they or it first obtains a certificate of registration as provided by this chapter." (TMC Chapter 1311)

Other parts of the same chapter matter to customers (TMC Chapter 1311):

No lending a registration. Under 1311.01(c), a registered contractor may not extend their registration to work done by anyone other than the registrant or registered tradesmen working under their direction.
State license first. Under 1311.05(c)(1), a plumbing contractor applicant must be licensed and provide a valid certificate of qualification from the Ohio Construction Industry Examining Board before getting a City certificate of registration.
Display. Under 1311.04, every holder of a certificate must display it in a conspicuous place at their principal place of business.
Annual expiration. Under 1311.08, certificates expire at midnight on December 31. They can be renewed without penalty until January 31, and "no work shall be performed with an expired certificate."
Discipline. The plumbing Board of Control can fine, suspend or revoke a registration for things like abandoning work, diverting a customer's funds, willfully disregarding the City's building laws, or making a substantial misrepresentation (1311.13). Fines run from $500 for a first offense up to $3,000 for later offenses (1311.99).

General contractors. A general contractor who is not registered may bid on plumbing work as part of a building project, provided the plumbing is done by registered tradesmen under a registered plumbing contractor (1311.01(b)). (TMC Chapter 1311)

Homeowners. The owner of a one-family dwelling does not need to be registered to do work on the home they occupy, but the work must meet the Building Code and all required permits and inspections still apply (1311.09(b) and (c)). (TMC Chapter 1311)

What Ohio requires

Ohio licenses commercial trade contractors in five trades: electrical, HVAC, plumbing, hydronics and refrigeration. The state's own guidance notes that "residential contractors are not required to be licensed" at the state level, and that many local building departments require state licenses to pull permits for residential and commercial projects. (Ohio Division of Industrial Compliance, Verifying licensed contractors) Toledo is one of those places: as noted above, City registration as a plumbing contractor requires the state license.

Ohio Revised Code 4740.13(A) says no person shall act as or claim to be a type of contractor the chapter licenses unless they hold that license. (ORC 4740.13) Licensed contractors must display their license number, written as "OH LIC#," on business locations, business cards, vehicles carrying the business name, contracts and advertisements. (OAC 4101:16-2-05) If an ad for plumbing services in Toledo shows no OH LIC# at all, ask why.

How to check a plumber in five minutes

1. Find them on the City list. The City of Toledo publishes its registered plumbing contractors with license numbers in the format "PLC-" followed by digits, along with the company name and phone. When this guide checked on 15 Nov 2026, the list showed 109 registrations and was last updated 10/14/2026. (City of Toledo, Plumbing Contractors) The City's registered contractors page also links separate lists for hydronics, HVAC, electrical and home remodeling contractors.

2. Look up the state license. On the state's OCILB eLicense lookup, choose "PL - Plumbing Contractors" as the license type and search by name or credential number. Confirm the license is active and that the name matches the company you are dealing with. The state's guidance points consumers to this same tool. (Ohio DIC guidance)

3. Match the names. The person or company on the City list, the state license and your written estimate should line up. Toledo's code bars lending a registration to someone else's work (1311.01(c)). (TMC Chapter 1311)

4. Confirm who pulls the permit. The City's Division of Building Inspection says that if work is contracted, the contractor must obtain the permit, and that contractors cannot legally work under a homeowner permit for work that requires a permit. (City of Toledo, When are permits required)

5. Ask for proof of insurance and confirm with the insurer that the policy is active, as the state's guidance recommends. (Ohio DIC guidance)

Outside Toledo city limits

Each nearby city or county runs its own permits:

Lucas County Building Regulations handles residential construction across the county except within Maumee, Oregon, Toledo, Berkey and Whitehouse. (Lucas County, Residential)
Maumee says contractors who install plumbing must register with the city and be licensed with the State of Ohio. (City of Maumee, Residential Building Permit Steps)
Oregon issues its own plumbing and waterline permits through its Building and Zoning Inspection Department. (City of Oregon, plumbing permit application)
Perrysburg (Wood County) says interior plumbing work will most likely require a permit from Wood County Building Inspection. (City of Perrysburg, Opening a Business) That page is written for businesses, so homeowners should confirm residential requirements with Wood County.

The area guides for Sylvania, Maumee and Perrysburg and Oregon have more detail.

Warning signs

From the State of Ohio's consumer guidance and the City's permit rules (Ohio DIC guidance; City of Toledo, When are permits required):

Refusing to get a permit, or suggesting you pull a homeowner permit for work they will do.
Pressure to decide on the spot, or deals that seem too good to be true.
A large down payment or full payment before work starts.
A vague contract without clear scope, timeline and payment terms.
No license number on ads, trucks or paperwork.

After the work

The City suggests having the final inspection made before final payment to a contractor, and notes that the homeowner can schedule the inspection with the permit number. (City of Toledo, When are permits required) Keep the permit, the final inspection record and the invoice together with your house papers. They help when you sell, and they help if something fails later.

A note on this site

This guide is not on either list because it is not a plumbing contractor. It publishes information only and does not perform, schedule or dispatch plumbing work.