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Utah has a near perfect tax structure and one blocker, which is that sale prices are private.
Works for some owners here, not all. Annual assessment at full market value, which is exactly the structure that makes appeals worthwhile. The only obstacle is non-disclosure, so the comparable sales would have to be licensed from realtor data rather than taken from public records.
So Utah decides these on market value, which means the evidence is recent sales of genuinely comparable homes. What really matters is whether that whole set of sales sits below your assessed value. If they bracket your assessment instead of falling under it, boards usually side with the assessor, because nothing's been clearly disproved.
Now a few things lose almost everywhere. Comparing your assessment to a neighbor's assessment usually doesn't count where the argument's market value. One sale on its own can pretty easily be dismissed as an outlier. And the size of your increase, or the size of your bill, isn't really evidence about what your home's worth.
September 15, or 45 days from your notice, whichever is later.
Miss it and you generally wait a year, so honestly the date matters more than the paperwork does.
And wherever you are, the single most useful thing you can actually do today is go find your assessment notice and read the date printed on it. That's what starts your clock, it's usually a much shorter window than people expect, and there's no getting it back once it's gone.
First, look up your own record. Your county assessor sets your value, and the county auditor mails a valuation notice each summer, usually by late July. Utah taxes homes on full market value every year, so a lower value really does lower your bill.
Next, know where to file. You appeal to your County Board of Equalization by September 15 or 45 days after your notice was mailed, whichever's later. The application's got to say what you think your home was worth on January 1, and it should include your evidence.
Then bring the evidence that wins here. Utah decides these on market value as of January 1. The hard part is that Utah keeps sale prices private, so you'll usually need a real estate agent's sales data or an appraisal to make the case.
Also, check your exemptions. If it's your primary residence, 45 percent of its value is already exempt, so it's worth checking your notice shows it. If you're 66 or older and under the income limit, the state's circuit breaker credit can help too.
We only turn a state on once we've read its appeal rules and its actual board decisions, because that's how we make sure what we tell you is right and not generic. It takes a few days per state, and honestly it's the reason our answers are worth anything.
In the meantime our free check runs in parts of Illinois, Washington, Ohio, Georgia, Colorado, North Carolina and Oregon, and in every town in New Jersey. If you leave your email on the check page, we'll write to you the day Utah goes live, and we won't email you before that.
We've screened all fifty states and DC on the same two questions. Does winning a lower market value actually lower your bill, or is there a cap sitting in between? And can you even put the evidence together from public records?
This comes from our own fifty-state screen, where we checked each state's cap, whether sale prices are public, whether there's an argument based on assessed values, and how many appeals actually get filed. Where we've quoted an appeal count, it's from the state or county that published it. If you spot an error, please write to hello@propertytaxbuddy.com and we'll correct it and say what changed.