County assessors across the country are mailing out new property valuations this month, and homeowners from Texas to Ohio are opening envelopes to find numbers that look nothing like what they paid.
In some neighborhoods, assessed values jumped 20% or more in a single cycle even as sale prices flattened out.
The notice is not a bill yet, but it decides what your bill will be.
Here's the part most people miss: an assessment is an opinion, and opinions get corrected all the time.
Assessors work from mass formulas, stale sales data, and sometimes a quick drive-by.
They don't know your roof is shot, your basement floods, or that the house next door sold cheap because it was a foreclosure.
That gap between the county's guess and reality is where appeals get won.
Most jurisdictions give you only 30 to 90 days from the mailing date to file a challenge, and the clock starts when the notice is sent, not when you get around to reading it.
Miss it and you generally wait a full year.
Find your county's appeal window this week and put the date in your phone.
Before you file, pull your property's record card, usually free on the county appraisal district website.
Check the basics: square footage, bedroom count, lot size, year built.
Errors here are common and easy to prove.
Then look up recent sales of similar homes in your neighborhood and compare price per square foot.
If your number is the outlier, you have a case.
Cracked foundations, outdated kitchens, a busy road out front, or a recent insurance claim for storm damage all support a lower value.
So does a professional appraisal, though that costs a few hundred dollars, so it only makes sense if the tax gap is larger than the fee.
Filing is usually free and often can be done online or by mail.
Many counties also offer an informal review first, where a staffer will adjust the number on the spot if your evidence is solid.
Be polite, be specific, and bring documents, not feelings.
Watch out for third-party "tax relief" companies that mail official-looking letters offering to handle your appeal for a cut of the savings.
Some are legitimate, but plenty charge 30% to 50% of your first-year reduction for paperwork you can file yourself in an afternoon.
Verify any company with your state's attorney general before signing anything.
One more thing worth checking: exemptions.
Homestead, senior, veteran, and disability exemptions vary wildly by state, and many homeowners qualify without knowing it.
A quick call to the assessor's office can confirm what you're entitled to and whether you need to reapply.
The honest takeaway is that the system counts on most people doing nothing.
Counties send thousands of notices knowing only a small slice will be questioned.
If your value looks inflated, spend an hour, gather three comps, and file before the deadline.
Final Thoughts
The worst outcome is a no, and the best is a lower bill for years.