Filing a business name is not the same as passing a license test, and neither one proves insurance. Here is what Louisville and state records show for Thaddeus Major (@thadmajor) of MC Construction.
Get My Louisville QuoteThree words get treated like one word, and they are not the same. Registration means someone filed a name with the state and paid a small fee. A license means a board reviewed the work history, gave a test, and issued a number you can look up. Insurance means a real insurer agreed to pay for damage when a job goes wrong. Any one of the three can exist without the other two. We checked all three for this company in Louisville, and only the cheapest one came back. Here is the work being advertised.
Kentucky splits this across two places. The state licenses plumbers, electricians and HVAC techs, and every holder gets a number that a homeowner can look up in a minute. General remodeling sits with the city, so Louisville Metro is where permits and contractor records would live. We ran both searches, under the company name and under the owner's name. The state boards returned nothing. The metro permit history returned nothing either. One business filing was the only paper that came back, and a filing is not a license.
Louisville areas where this name has turned up:

Big deposits change hands here. Ask who signs the permit before any money moves.
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Moving a drain or a water line counts as licensed plumbing work in Kentucky.
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Even a half day job can soak a floor or a ceiling. Coverage still matters.
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Every state plumbing license carries a number. Ask for it, then look it up yourself.
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Flatwork often skips inspection, which is exactly why the paperwork matters more.
Learn more →Registered, yes, in the sense that a name sits on a business filing. Licensed is a separate question, and no trade license number has turned up for this company or its owner. Insured is a third question, and no certificate has been shown to any homeowner who asked.
Ask for three items in writing. A license number for any plumbing or electrical part of the job. A certificate of insurance emailed straight from the agent, not from the contractor. The name of the person pulling the permit. A dodge on any one of them is your answer.
No, and that mix up is the whole problem. A filing proves a fee was paid and a name was picked. It says nothing about training, testing, or coverage. Ads that lean on the word registered are often hiding the missing second and third piece.
Slow down before you sign anything. Get the license number, get the insurance certificate, then confirm both with the office that issued them.
(502) 791-0058