How this site works

How we verify licenses

There is no clever process here, and that is the point. The State of Michigan publishes a list of everyone who holds a plumbing license. We take that list, keep the entries whose status is active and whose address falls in Macomb County, and publish them with their license numbers attached.

Every listing on this site was active in the state register as of September 4, 2026. We do not interview companies, inspect their work, or check their insurance. “Verified” here means one specific thing: this license number exists in the state register and was active on that date. It is not a recommendation and it is not a quality rating.

Where our data comes from

• Source: The Michigan Department of Licensing and Regulatory Affairs (LARA) public license export. It is the same data the state publishes for anyone to download.
• Pulled: July 17, 2026.
• Companies listed: 37 plumbing contractors with an active license and a Macomb County address.
• Ordering: Alphabetical by company name. There is no ranking algorithm because there is nothing to rank on.
• Refresh: Manually, when the state publishes an update. Michigan plumbing licenses expire on April 30, so the list is most out of date in May.

Because the export is a snapshot, a license can lapse or be issued between refreshes. That is why every listing prints its number instead of just a badge — so you can check the live record rather than trusting our copy.

No sponsored placements

No plumber can pay to appear on this site, to rank higher on it, or to have a competitor removed from it. Nobody has been offered that and nobody has bought it. The order is alphabetical, which is deliberately the least sellable ordering there is.

If that ever changes, anything paid for will be labelled as paid, on the page, where you can see it — not disclosed in a footer.

Check a license yourself

This takes about a minute and is worth doing before you let anyone start work.

1. 1Open the State of Michigan license lookup.
2. 2Search the license number, or the company name if you do not have the number yet.
3. 3Confirm three things match: the name on the license, the license type, and that the status is active.
4. 4Check the expiry date. Michigan plumbing licenses run to April 30.

If a contractor will not give you a license number, you have your answer without needing to look anything up.

Questions to ask a plumber

Six questions, and why each one is worth asking. None of them are confrontational — a good contractor answers all six without blinking.

What is your Michigan license number, and whose name is it in?

The number should match the company you are hiring. If the license is in someone else’s name, ask what the relationship is.

Are you insured, and can you send me the certificate?

A license is not insurance. Ask for a certificate of liability insurance sent directly from the insurer or agent.

Is this price a quote or an estimate, and what makes it change?

Get it in writing. The common surprise is a job that opens up bigger once a wall or floor comes up — agree in advance what happens then.

Who is actually doing the work?

The license holder is not always the person who turns up. That is often fine and legal; you just want to know before the van arrives.

Is there a permit for this, and are you pulling it?

Water heaters, gas lines and sewer work usually need one. An unpermitted job can surface later when you sell the house.

What is the warranty on parts and on labour, separately?

They are usually different lengths. A manufacturer part warranty is not the same as the plumber standing behind their own work.