Home / Cook County / Chicago
46,974 Chicago homeowners took a property tax appeal to a decision in 2024, and 12,127 of them got a reduction. That's 25.8 percent. Here's what the county's own records say about your odds and which deadline is yours.
Chicago is split across more than one township, and that really matters because Cook County opens appeals one township at a time. So two neighbors in Chicago can have different deadlines. Your township is printed on your assessment notice, so go by that rather than the name of the town.
| Township | Assessor appeal | Board of Review appeal |
|---|---|---|
| Jefferson Township about 43 percent of Chicago's appeals | Open until 11/12/2026 | Not scheduled yet |
| Lake Township about 20 percent of Chicago's appeals | Open until 10/29/2026 | Not scheduled yet |
| Lake View Township about 12 percent of Chicago's appeals | Closed for this round | Closed 9/29/2026 |
| West Chicago Township about 9 percent of Chicago's appeals | Closed for this round | Not scheduled yet |
| Hyde Park Township about 6 percent of Chicago's appeals | Open until 10/8/2026 | Not scheduled yet |
| Rogers Park Township about 4 percent of Chicago's appeals | Closed for this round | Closed 9/1/2026 |
| North Chicago Township about 3 percent of Chicago's appeals | Not on the calendar yet | Not scheduled yet |
| South Chicago Township about 3 percent of Chicago's appeals | Not on the calendar yet | Not scheduled yet |
The Assessor and the Board of Review are two separate free appeals at two different offices. The Board of Review takes the same evidence, and its evidence deadline falls ten days after its filing deadline, so you can file first and send your evidence after.
That's well above Cook County as a whole, where 19.4 percent of house appeals won. Put plainly, about 74 out of every 100 Chicago homeowners who appealed got nothing back for their afternoon.
Now, in Illinois you don't win by arguing what your house would sell for. You win by showing that homes pretty much like yours, nearby, are assessed lower per square foot than yours is. The state appeal board asks for at least three comparable homes, and if you sit above their range you have a case. If you're inside the range or below it, honestly, no amount of paperwork changes the answer.
Honestly, for most people the answer is no, and we'd rather tell you that than have you find out the hard way. The only real question is whether your home sits above the range for similar homes near you. Our free check reads Cook County's own records, runs that same per square foot comparison, and tells you straight which side you're on. Most people who use it get told not to bother.
We took every 2024 house appeal in the Cook County Assessor's published appeals dataset and matched each property's PIN to its address in the Assessor's addresses dataset, so these are Chicago's own numbers rather than its township's. Houses are classes 202 through 210, 234 and 278. A win means the certified value came in below the value the county mailed out. We only publish a town with at least 150 decided cases, because a rate built on fewer honestly isn't worth trusting.
If you spot an error, please write to hello@propertytaxbuddy.com and we'll correct it and say what changed.