Millions of homeowners are opening envelopes right now that tell them what their house is worth — at least according to the county.
These assessment notices set the number your property tax bill gets built on, and in many markets they're climbing even as home sales cool off.
Sale prices have flattened or dipped in parts of the country, but assessments often lag the market by a year or more, so the number on your notice may reflect a peak that already passed.
Property taxes run roughly $2,000 to $8,000 a year for a typical homeowner depending on the state, and a bloated assessment can quietly add hundreds to your annual bill — money that could be going toward groceries, a car payment, or an emergency fund.
The good news: you can fight back, and the process is more accessible than most people assume.
Start by checking the math on your notice.
Counties publish the formula they use, usually a percentage of your home's assessed value, and errors happen more often than you'd think — wrong square footage, a finished basement that was never permitted, or a neighbor's lot description bleeding into yours.
Pull recent sale prices for three to five homes similar to yours in size, age, and location, ideally sold within the past year.
If your assessment is higher than what comparable homes actually sold for, you have a case.
Every county has a formal appeal window, often 30 to 90 days from the notice date, and missing it usually means waiting another year.
The appeal itself is typically a one-page form plus your evidence.
Some jurisdictions let you do it entirely online; others require a short hearing, sometimes by phone.
Filing is usually free, and you don't need a lawyer for a straightforward challenge.
You also don't need to hire one of those mailers offering to "reduce your property taxes" for a cut of the savings — many just file the same paperwork you can submit yourself.
One more move worth making: ask about exemptions.
Veterans, seniors, disabled homeowners, and primary residents in many states qualify for breaks that lower the taxable value.
Some people never claim them because nobody told them they existed.
If the numbers still look off after an appeal, you can often request an informal review with the assessor's office before the formal hearing.
A polite phone call with documentation resolves a surprising number of cases.
Assessments reset annually, and a successful appeal this cycle doesn't automatically carry forward in every county.
The bottom line: an assessment notice is not a final bill — it's an opening offer, and counties expect some pushback.
Spending an hour with your paperwork and a few comps is one of the better hourly returns available to a homeowner right now.
Final Thoughts
Ignore the envelope and you're simply accepting whatever number someone typed in.