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.
13
Townships open now
Matches the /deadlines count
4
Opening soon
Get notified before the window opens
21
Future-cycle / closed
North Suburbs and Chicago follow later
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 | Apr 15 – May 19, 2026 | cicero, riverside, stickney | |
| Bloom | Open now | Apr 22 – May 26, 2026 | bremen, rich, thornton | |
| Bremen | Open now | Apr 8 – May 12, 2026 | bloom, orland, thornton | |
| Calumet | Open now | May 4 – Jun 8, 2026 | thornton, worth, bremen | |
| Cicero | Open now | Apr 15 – May 19, 2026 | berwyn, stickney, proviso | |
| Lemont | Opening soon | May 13 – Jun 15, 2026 | palos, orland, lyons | |
| Lyons | Open now | May 6 – Jun 9, 2026 | riverside, proviso, lemont | |
| Oak Park | Open now | Apr 29 – Jun 2, 2026 | proviso, river forest, berwyn | |
| Orland | Opening soon | May 20 – Jun 23, 2026 | palos, bremen, lemont | |
| Palos | Opening soon | May 13 – Jun 15, 2026 | orland, worth, lemont | |
| Proviso | Open now | Apr 22 – May 26, 2026 | oak park, river forest, lyons | |
| Rich | Open now | Apr 29 – Jun 2, 2026 | bloom, bremen, thornton | |
| River Forest | Open now | Apr 29 – Jun 2, 2026 | oak park, proviso, lyons | |
| Riverside | Open now | May 6 – Jun 9, 2026 | berwyn, lyons, stickney | |
| Stickney | Open now | Apr 15 – May 19, 2026 | cicero, berwyn, riverside | |
| Thornton | Open now | May 4 – Jun 8, 2026 | calumet, bloom, rich | |
| Worth | Opening soon | May 20 – Jun 23, 2026 | palos, calumet, orland |
North Suburbs2027 reassessment cycle
| Township | Status | Window | Nearby townships | Action |
|---|---|---|---|---|
| Barrington | Future cycle | Apr 21 – May 25, 2027 | palatine, hanover, wheeling | Opens 2027 → |
| Elk Grove | Future cycle | May 5 – Jun 8, 2027 | schaumburg, wheeling, leyden | Opens 2027 → |
| Evanston | Future cycle | May 19 – Jun 22, 2027 | new trier, niles, northfield | Opens 2027 → |
| Hanover | Future cycle | Apr 21 – May 25, 2027 | barrington, schaumburg, palatine | Opens 2027 → |
| Leyden | Future cycle | May 12 – Jun 15, 2027 | norwood park, elk grove, maine | Opens 2027 → |
| Maine | Future cycle | May 12 – Jun 15, 2027 | niles, leyden, norwood park | Opens 2027 → |
| New Trier | Future cycle | May 26 – Jun 29, 2027 | evanston, northfield, niles | Opens 2027 → |
| Niles | Future cycle | May 19 – Jun 22, 2027 | evanston, maine, norwood park | Opens 2027 → |
| Northfield | Future cycle | May 26 – Jun 29, 2027 | new trier, evanston, wheeling | Opens 2027 → |
| Norwood Park | Future cycle | May 12 – Jun 15, 2027 | niles, maine, leyden | Opens 2027 → |
| Palatine | Future cycle | Apr 28 – Jun 1, 2027 | barrington, schaumburg, wheeling | Opens 2027 → |
| Schaumburg | Future cycle | Apr 28 – Jun 1, 2027 | palatine, hanover, elk grove | Opens 2027 → |
| Wheeling | Future cycle | May 5 – Jun 8, 2027 | palatine, northfield, elk grove | Opens 2027 → |
City of Chicago2028 reassessment cycle
| Township | Status | Window | Nearby townships | Action |
|---|---|---|---|---|
| Hyde Park | Future cycle | May 15 – Jun 19, 2028 | lake, south chicago, lake view | Opens 2028 → |
| Jefferson | Future cycle | May 1 – Jun 5, 2028 | lake view, rogers park, north chicago | Opens 2028 → |
| Lake | Future cycle | May 15 – Jun 19, 2028 | hyde park, south chicago, west chicago | Opens 2028 → |
| Lake View | Future cycle | May 8 – Jun 12, 2028 | jefferson, north chicago, hyde park | Opens 2028 → |
| North Chicago | Future cycle | May 8 – Jun 12, 2028 | lake view, rogers park, west chicago | Opens 2028 → |
| Rogers Park | Future cycle | May 1 – Jun 5, 2028 | jefferson, north chicago, lake view | Opens 2028 → |
| South Chicago | Future cycle | May 22 – Jun 26, 2028 | hyde park, lake, west chicago | Opens 2028 → |
| West Chicago | Future cycle | May 22 – Jun 26, 2028 | lake, north chicago, south chicago | Opens 2028 → |
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 through the Cook County Assessor or Board of Review portal before your township window closes. Filing is free.
Deadline dates are approximate. Always verify current open/close dates at the official Cook County Assessor assessment calendar. OverTaxed IL is not affiliated with the Cook County Assessor's Office.