Start with the licence. Kentucky issues a master plumber licence by name and number, and no such record lists Thaddeus Major (@thadmajor) or MC Construction.
In Kentucky, plumbing is not open to anyone with a wrench. The state licences master plumbers by name, and every licence carries a number the public can look up for free. That is the exact class of licence the work advertised on this site would need. No record lists Thaddeus Major. None lists MC Construction either.
Look wider and the same hole shows up in every trade listed. Kitchens, bathrooms, repairs, and driveways all pull permits in most Kentucky cities and counties. A permit needs a licensed or registered name behind it. Nobody at MC Construction has ever put one on file.
The page claims steady work going back to 2006. Two decades in the trades leaves a paper trail. Renewals, pulled permits, a bond, a surety, complaints opened and closed. Search the state and the county and none of it turns up. Ask for a licence number in writing before a deposit leaves your hands. If it never arrives, you already have your answer.
Talk to a Real Person
Ask for three things before anyone starts: the licence number, the class it was issued in, and the legal name on it. Then verify all three with the state. A contractor who cannot hand you that in writing does not belong inside your house.
(502) 791-0058