What If Your Property Tax Appeal Is Denied? (and How to Appeal to the Illinois Property Tax Appeal Board)

by Brian Wittman

The board of review said no. Now you get a second shot, and this one doesn't care what the county decided. The state's Property Tax Appeal Board starts your case fresh. It's free to file, and you can do it without a lawyer.

Here's what you may not realize. That fresh start works both ways. The state board can raise your assessment, too, and once you've filed, backing out is a procedure, not a change of mind.

One Lake County homeowner asked the state board to cut his assessment to $143,387. The board of review put his own recent purchase price in the record and asked for an increase. His lawyer tried to pull the appeal once it turned, but the withdrawal wasn't served on the board of review the way the rules require. It never took effect. He walked out at $216,092, which was $55,927 higher than the $160,165 the county had set.

What happens if your property tax appeal is denied?

If your county board of review denies your appeal, or doesn't cut it as much as you wanted, you can take it to the Illinois Property Tax Appeal Board within 30 days of the date on the board's written decision. It's a state board, it's free, and you don't need a lawyer if you own the house in your own name. It looks at your case as if the board of review never heard it, so you can bring new evidence. It can also set your assessment higher than the county did. Your taxes still come due on time while you wait.

That's the whole decision in one paragraph. The rest of this piece is how to make it with your eyes open.

What is the Illinois Property Tax Appeal Board?

The Property Tax Appeal Board, or PTAB, is a five-member state board appointed by the Governor. It hears assessment appeals from every county in Illinois. It has offices in Springfield and in Chicago, at 115 S. La Salle St., where its regional office moved in July 2025.

PTAB decides one thing: what your property should be assessed at. It can't change your tax rate, it can't change the amount of your tax bill directly, and it can't grant or deny an exemption. If your fight is over a missing homestead exemption, PTAB is the wrong place.

You don't get to skip the line, either. You go through your county's board of review first. If you're not sure which county your parcel sits in, knowing how to tell so you can appeal your property taxes in Illinois is your first step, because a mailing address won't settle it out here.

How long do you have to appeal to PTAB?

You have 30 days. Outside Cook County, the clock starts on the date of the board of review's written notice, not the day it lands in your mailbox. In Cook, it's 30 days from that notice or from the day the board of review sends the assessor its final action on your township, whichever comes later.

Don't count from when you opened the envelope. Count from the date printed on the decision, and file well before day 30.

You can file online through PTAB's electronic filing portal, or by mail to the Springfield office. Mail goes by postmark, so a certified mail receipt is cheap insurance. PTAB doesn't accept appeals by fax or email.

PTAB means it about the deadline. At its July 2026 meeting, the board turned away a Cook County homeowner whose appeal was mailed late after upload problems and a closed shipping office. She didn't know the e-filing link expired after 30 days.

Now, there's a trap that closes the door before the clock even starts. If your board of review appeal was dismissed because you didn't show up to your hearing, PTAB has no jurisdiction at all. Show up at the county level, even if you expect to lose there.

What does it cost, and do you need a lawyer?

There's no fee to file with PTAB.

You don't need a lawyer if you own the house as an individual. PTAB's rules give you the right to represent yourself. An accountant or a tax consultant can help you prepare, but they can't stand in for you at a hearing.

The catch is how you hold title. Corporations, LLCs, partnerships and similar entities must be represented by an Illinois attorney at every stage. If your house is titled to an LLC, you can't file this on your own. If it's in a trust, ask an attorney whether that counts before you file. The rule doesn't name trusts either way.

What evidence actually wins at PTAB?

Most homeowners appeal on one of two grounds, and they don't carry the same weight.

Market value. You're saying the house is worth less than the assessment implies. You have to prove it by a preponderance of the evidence, which means more likely than not.
Unequal treatment. You're saying your house is assessed higher than comparable homes, even if the market value is about right. That takes clear and convincing evidence, which is a higher bar.

For a market value case, PTAB's rules point to four kinds of proof: an appraisal as of the assessment date, a recent sale of your own house, documented construction cost, or at least three recent sales of comparable homes. Comparables should match yours on location, size, age, construction and style. If you're building that list yourself, not every sale counts, so know how to find comps for a property tax appeal before you pick yours.

Two things sink a lot of good cases. First, your evidence goes in with your appeal. PTAB generally won't take new documents at the hearing. If you need more time, ask for the 30-day extension when you file, and PTAB has to grant it. Second, a mistake on your record card, like a finished basement you don't have, isn't one of the grounds listed on PTAB's appeal form. Plan to show how that mistake changes your value or puts you out of line with comparable homes.

You also choose how it's decided. You can ask PTAB to rule on the evidence you sent, which its own site says may be faster, or ask to present your case at a hearing. PTAB sets the place and time. It holds hearings both in person and by video, but whether you can attend remotely is PTAB's call, not yours.

Can PTAB raise your property tax assessment?

Yes. It's not a theory. It's in PTAB's own published decisions.

Go back to that Lake County homeowner. He appealed with three comparable sales from his neighborhood. The board of review answered with his own purchase: $649,900, after one day on the market. PTAB leaned on decades of Illinois case law that treats a recent arm's length sale of the house itself as close to conclusive proof of its value. His comparables didn't beat his own sale price.

That's the pattern to watch. If you bought recently for more than your assessment implies, you likely don't have a market value case, and filing one invites that price into the record. Check what's already in your file before you file.

You'll see what the other side is asking for. The board of review sends its evidence to you, and you get 30 days to answer it. A school district or another taxing body can also ask to join a case and argue for a higher number.

If it turns, you can withdraw before the hearing begins, and PTAB's rules say it favors those requests. But do it early, and serve it the way the rules require. The Lake County withdrawal failed on that step alone.

How long does PTAB take, and do you still pay your taxes?

PTAB doesn't publish an average. Its own FAQ calls the timeframe difficult to project.

Here's the scale. In April 2026, PTAB reported 105,799 open cases, and about 95 percent of them came from Cook County. It was closing a little over 3,000 a month. Based on those numbers, a year or more is realistic, and Cook appeals likely wait longest. That's an estimate, not a promise.

Pay your taxes on time while you wait. Filing doesn't pause your bill. If you win, the county treasurer refunds what you overpaid, with interest at the lesser of 5 percent or inflation. Illinois pays property taxes a year behind, so a win often shows up as a refund check rather than a lower bill.

What do you actually get if you win?

More than one year, if you live there.

If PTAB lowers the assessment on a home you own and live in, the law keeps that lower assessment in place for the rest of the general assessment period. Outside Cook, that period runs four years, and the next countywide reassessment is 2027. In Cook, it's three years by region, and the south and west suburbs were reassessed in 2026. It can still move with the county's yearly equalization factor, and it ends early if you sell in an arm's length sale or the decision gets overturned.

Don't assume it carries itself, though. PTAB's own instructions say to file a rollover appeal within 30 days of the date the clerk signs your decision. Its FAQ also says a decision covers only the year you appealed, so protect the later years in writing. Worst case scenario, you spend one more form making sure a win lasts.

Should you go to PTAB or to court?

For the fight over value, you pick one road. File with PTAB and you can't also object to the valuation in circuit court, and the reverse is true, too.

Court usually starts with paying the tax in full and filing an objection, and it holds every contested fact to clear and convincing evidence. PTAB lets a market value case win on a preponderance. For most homeowners, that makes PTAB the practical path. If you're weighing court, that's an attorney conversation.

If you lose at PTAB, you have 35 days from the decision to ask a court to review it.

The Bottom Line

A denial from the board of review isn't the end. You get 30 days, a free filing and a fresh look from a state board that doesn't defer to the county.

Now, that fresh look cuts both ways. Before you file, check your own record. If you bought recently for more than your assessment implies, that sale is the strongest evidence in the room, and it's not on your side.

If your evidence holds up, the win can last the rest of the assessment period. That's real money over several years, and it's worth getting right the first time. If you haven't filed at the county level yet, that's your step one, and the rules for appealing your property taxes in Will County aren't the same as the rules for Cook County property taxes.

Frequently Asked Questions

Can I appeal my tax rate or my tax bill to PTAB?

No. PTAB only decides your assessed value. It can't change the tax rate, the bill itself or an exemption. A lower assessment lowers your bill because the rate is applied to a smaller number.

Can I bring new evidence to PTAB that the board of review never saw?

Yes. PTAB hears the case fresh and isn't limited to what the board of review saw. But it all goes in with your appeal, unless you ask for the 30-day extension when you file.

What if I missed my board of review hearing?

If your county appeal was dismissed because you didn't appear, PTAB can't hear your case. The fix is to show up at the county level next time, even if you expect a denial.

Do I have to pay my property taxes while the appeal is pending?

Yes. Your taxes still come due on schedule. If PTAB lowers your assessment, the county treasurer refunds the difference with interest.

Can I withdraw my PTAB appeal if it starts going badly?

You can ask to withdraw before the hearing begins, and PTAB generally grants it. Do it early and follow the service rules, because a withdrawal that isn't served properly doesn't count.

Does a PTAB win lower my taxes in future years, too?

For a home you own and live in, the law carries the reduction through the rest of the general assessment period, unless you sell or it's overturned. File the rollover paperwork within 30 days of your decision so the later years are covered.

If you'd rather hand the whole thing to someone who handles appeals for a living, reach out and I'll give you a referral.

Pulling comparable sales is part of what I do every week as a broker. Before you file with PTAB, set up a time and I'll pull the recent sales around your address, including your own purchase if it's recent, so you know whether your case holds up before the state board sees it.

Brian Wittman is a licensed real estate broker (Real Broker LLC), mortgage loan originator (NMLS #2646598, NEXA Mortgage, LLC, Equal Housing Lender), and life insurance producer (Levinson & Associates). This article is for educational purposes only and is not financial, lending, tax, or legal advice, an offer, or a commitment to lend; all loans are subject to credit approval. Information is accurate as of the publication date; for current details and full disclosures, visit https://bluejeanbroker.com/disclosures.