Cook County Township Appeal Deadlines
All 38 Cook County townships are listed below using one shared source of truth: 2026 South & West Suburbs, 2027 North Suburbs, and 2028 City of Chicago.
4
Townships open now
Verified open with the Cook County Assessor
0
Opening soon
Get notified before the window opens
34
Closed / date pending
Pending townships show no date until the Assessor posts one
Why the cycle matters
The deadline page and township index now render from the same data.
If a township is open on /deadlines, it is open here too. Dates are still public-record estimates and should be verified against the official Cook County assessment calendar before filing.
South & West Suburbs2026 reassessment cycle
| Township | Status | Window | Nearby townships | Action |
|---|---|---|---|---|
| Berwyn | Open now | May 20, 2026 – July 6, 2026 | cicero, riverside, stickney | |
| Bloom | Date pending | Pending official date | bremen, rich, thornton | Date pending → |
| Bremen | Date pending | Pending official date | bloom, orland, thornton | Date pending → |
| Calumet | Date pending | Pending official date | thornton, worth, bremen | Date pending → |
| Cicero | Date pending | Pending official date | berwyn, stickney, proviso | Date pending → |
| Lemont | Date pending | Pending official date | palos, orland, lyons | Date pending → |
| Lyons | Date pending | Pending official date | riverside, proviso, lemont | Date pending → |
| Oak Park | Closed | May 6, 2026 – June 18, 2026 | proviso, river forest, berwyn | Board of Review window later this year → |
| Orland | Date pending | Pending official date | palos, bremen, lemont | Date pending → |
| Palos | Open now | June 3, 2026 – July 17, 2026 | orland, worth, lemont | |
| Proviso | Date pending | Pending official date | oak park, river forest, lyons | Date pending → |
| Rich | Date pending | Pending official date | bloom, bremen, thornton | Date pending → |
| River Forest | Closed | April 20, 2026 – June 2, 2026 | oak park, proviso, lyons | Board of Review window later this year → |
| Riverside | Closed | April 24, 2026 – June 8, 2026 | berwyn, lyons, stickney | Board of Review window later this year → |
| Stickney | Date pending | Pending official date | cicero, berwyn, riverside | Date pending → |
| Thornton | Date pending | Pending official date | calumet, bloom, rich | Date pending → |
| Worth | Date pending | Pending official date | palos, calumet, orland | Date pending → |
North Suburbs2027 reassessment cycle
| Township | Status | Window | Nearby townships | Action |
|---|---|---|---|---|
| Barrington | Date pending | Pending official date | palatine, hanover, wheeling | Date pending → |
| Elk Grove | Date pending | Pending official date | schaumburg, wheeling, leyden | Date pending → |
| Evanston | Closed | April 22, 2026 – June 4, 2026 | new trier, niles, northfield | Board of Review window later this year → |
| Hanover | Date pending | Pending official date | barrington, schaumburg, palatine | Date pending → |
| Leyden | Date pending | Pending official date | norwood park, elk grove, maine | Date pending → |
| Maine | Open now | June 5, 2026 – July 21, 2026 | niles, leyden, norwood park | |
| New Trier | Closed | May 7, 2026 – June 22, 2026 | evanston, northfield, niles | Board of Review window later this year → |
| Niles | Date pending | Pending official date | evanston, maine, norwood park | Date pending → |
| Northfield | Date pending | Pending official date | new trier, evanston, wheeling | Date pending → |
| Norwood Park | Closed | April 13, 2026 – May 26, 2026 | niles, maine, leyden | Board of Review window later this year → |
| Palatine | Date pending | Pending official date | barrington, schaumburg, wheeling | Date pending → |
| Schaumburg | Date pending | Pending official date | palatine, hanover, elk grove | Date pending → |
| Wheeling | Date pending | Pending official date | palatine, northfield, elk grove | Date pending → |
City of Chicago2028 reassessment cycle
| Township | Status | Window | Nearby townships | Action |
|---|---|---|---|---|
| Hyde Park | Date pending | Pending official date | lake, south chicago, lake view | Date pending → |
| Jefferson | Date pending | Pending official date | lake view, rogers park, north chicago | Date pending → |
| Lake | Date pending | Pending official date | hyde park, south chicago, west chicago | Date pending → |
| Lake View | Open now | May 28, 2026 – July 13, 2026 | jefferson, north chicago, hyde park | |
| North Chicago | Date pending | Pending official date | lake view, rogers park, west chicago | Date pending → |
| Rogers Park | Closed | April 17, 2026 – June 1, 2026 | jefferson, north chicago, lake view | Board of Review window later this year → |
| South Chicago | Date pending | Pending official date | hyde park, lake, west chicago | Date pending → |
| West Chicago | Date pending | Pending official date | lake, north chicago, south chicago | Date pending → |
Get notified when your township's window opens
Free. No account needed. We'll email you when your appeal window opens and remind you 7 days before it closes.
How the appeal process works
1. Check your assessment
Look up your current assessed value using your address or PIN, then compare it with similar nearby homes.
2. Build the packet
OverTaxed IL organizes assessment-level and uniformity evidence from Cook County public records into a filing-ready packet.
3. File before your deadline
Submit your first-level appeal through the Cook County Assessor portal before your township window closes (the Board of Review opens a separate second-chance window later in the year). Filing is free.
Deadline dates are pulled from verified Cook County Assessor calendar entries when published. Always confirm current open/close dates at the official Cook County Assessor assessment calendar. OverTaxed IL is not affiliated with the Cook County Assessor's Office.