Back in 1994, Michigan passed something called Proposal A. It put a cap on how fast a home's taxable value can climb. As long as the same owner keeps the home, the taxable value can only rise each year by the lesser of 5% or the rate of inflation (the CPI). That's it.
Sounds boring, but here's why it matters to you. A seller who's owned their Whitehall home for fifteen years has had their taxable value held down that whole time. It's probably sitting well below what the home is actually worth today. Their tax bill reflects fifteen years of that cap.
You don't inherit that. The year after a home is sold, its taxable value "uncaps." It resets upward. So the tax amount the seller quoted you is not the tax amount you'll pay. Say this to yourself before every offer: never assume you'll pay the seller's current tax bill. Yours will almost always be higher.

What it resets to: meet SEV
When a home uncaps, its taxable value resets up to the State Equalized Value, or SEV. The SEV is roughly half of a property's true market value. The assessed value is essentially the same figure.
So if a lakefront home sells for $500,000, its SEV is somewhere around $250,000, and that's the number your taxes get calculated from after the reset. This is the piece out-of-state buyers rarely hear until it's too late. It's worth understanding before you fall for a place. Plenty of people move to the White Lake area without realizing this until closing.
