ParcelVue

Appeal Window Tracker

Every township's property tax appeal window, live from the Assessor's official calendar, next to how many homes our analysis flags as over-assessed.

Cook County, IllinoisMore counties as we grow.
1,077,564
homes analyzed against the Assessor's own data
250,478
flagged as assessed above comparable homes nearby
$10,424
average assessment gap on flagged homes

Method: class-filtered medians with a 10% threshold, computed from Cook County Assessor records. How we decide

Open right now

These townships can file an appeal with the Assessor today. Filing is free, and an appeal cannot raise your assessment.

Open, closes September 23
Barrington
1,181
flagged of 4,835
$20,519
average gap
Check your address
Open, closes September 24
Bremen
7,233
flagged of 33,697
$4,140
average gap
Check your address
Open, closes September 29
Lemont
1,938
flagged of 8,111
$11,015
average gap
Check your address
Open, closes October 2
Calumet
1,110
flagged of 4,555
$4,195
average gap
Check your address
Open, closes October 8
Hyde Park
19,391
flagged of 61,259
$7,966
average gap
Check your address
Open, closes October 14
Leyden
3,648
flagged of 23,136
$8,174
average gap
Check your address
Open, closes October 15
Worth
10,032
flagged of 42,529
$5,267
average gap
Check your address

All 38 townships

Townships open on the Assessor's staggered calendar through the year. Ended windows get a second round at the Board of Review. Not-yet-opened townships can sign up below to be emailed when theirs opens.

TownshipStatusWindow closesHomes analyzedFlaggedAverage gap
BarringtonOpenSeptember 23, 20264,8351,181$20,519
BerwynWindow endedJuly 6, 202612,9832,698$5,710
BloomNot yet openedTBA28,0206,365$3,723
BremenOpenSeptember 24, 202633,6977,233$4,140
CalumetOpenOctober 2, 20264,5551,110$4,195
CiceroWindow endedJuly 31, 202613,4122,784$4,495
Elk GroveWindow endedAugust 4, 202618,0172,652$8,959
EvanstonWindow endedJune 4, 202612,0733,247$17,980
HanoverNot yet openedTBA25,4214,046$6,339
Hyde ParkOpenOctober 8, 202661,25919,391$7,966
JeffersonNot yet openedTBA110,23625,376$10,930
LakeNot yet openedTBA139,05833,247$5,417
Lake ViewWindow endedJuly 13, 202620,6236,452$32,811
LemontOpenSeptember 29, 20268,1111,938$11,015
LeydenOpenOctober 14, 202623,1363,648$8,174
LyonsWindow endedSeptember 3, 202630,5687,706$11,313
MaineWindow endedJuly 21, 202633,9767,077$11,144
New TrierWindow endedJune 22, 202617,3125,362$32,308
NilesNot yet openedTBA30,9848,136$10,649
North ChicagoNot yet openedTBA4,2481,517$49,088
NorthfieldWindow endedSeptember 4, 202623,2035,762$21,804
Norwood ParkWindow endedMay 26, 20268,1321,319$9,847
Oak ParkWindow endedJune 18, 202611,1832,666$11,275
OrlandNot yet openedTBA28,4834,702$8,265
PalatineNot yet openedTBA27,7524,784$10,727
PalosWindow endedJuly 17, 202614,0472,947$8,530
ProvisoNot yet openedTBA41,9388,219$5,977
RichNot yet openedTBA22,5223,823$4,369
River ForestWindow endedJune 2, 20262,758735$19,192
RiversideWindow endedJune 8, 20265,2471,279$9,159
Rogers ParkWindow endedJune 1, 20266,9451,656$14,744
SchaumburgNot yet openedTBA30,6703,938$10,281
South ChicagoNot yet openedTBANot analyzedNot analyzedNot analyzed
StickneyWindow endedAugust 12, 202612,4613,428$5,701
ThorntonNot yet openedTBA54,86113,028$3,110
West ChicagoWindow endedAugust 21, 202660,37519,140$16,656
WheelingNot yet openedTBA36,4366,810$11,118
WorthOpenOctober 15, 202642,52910,032$5,267

Get your township's deadlines by email

Pick your township and we will email you when its Assessor appeal window opens for a new cycle, and again about five days before it closes. No spam, no list-selling, unsubscribe anytime.

One or two emails per cycle. That is it.

Check your property for free

See whether your Cook County home is assessed above the median for comparable properties nearby. The check is free and takes about a minute.

Check your property

Window status updated September 4, 2026.