Cook County Township Appeal Deadlines
Each Cook County township has its own appeal window. Find yours below, check your deadline, and start your appeal before the window closes.
6
Townships open now
File before your deadline
5
Opening soon
Get notified when your window opens
3 yrs
Savings locked in
A 2026 win saves you through 2029
Why 2026 matters
A win in 2026 saves you money through 2029.
Cook County reassesses on a 3-year cycle. South district townships are up this year. A successful appeal locks in your reduced assessment — $500–$1,500/year savings for up to 3 years.
$500–$1,500/year × 3 years = $1,500–$4,500 from one appeal.
South District2026 reassessment cycle
| Township | Status | Open | Deadline | Includes | Action |
|---|---|---|---|---|---|
| Bloom | Open Now | Jan 2026 | Mar 2026 | Chicago Heights, Flossmoor, Glenwood, Homewood, Lansing, Lynwood, Sauk Village, South Chicago Heights, Thornton | Appeal now |
| Bremen | Open Now | Jan 2026 | Mar 2026 | Alsip, Blue Island, Crestwood, Evergreen Park, Merrionette Park, Midlothian, Oak Forest, Posen, Robbins | Appeal now |
| Calumet | Open Now | Feb 2026 | Apr 2026 | Burnham, Calumet City, Dolton, Riverdale, South Holland, Thornton | Appeal now |
| Rich | Open Now | Feb 2026 | Apr 2026 | Country Club Hills, Flossmoor, Matteson, Olympia Fields, Park Forest, Richton Park, Steger | Appeal now |
| Thornton | Open Now | Feb 2026 | Apr 2026 | Blue Island, Harvey, Hazel Crest, Markham, Phoenix, Posen, Riverdale, South Holland | Appeal now |
| Worth | Open Now | Jan 2026 | Mar 2026 | Bridgeview, Chicago Ridge, Hickory Hills, Justice, Oak Lawn, Palos Hills, Palos Park, Willow Springs | Appeal now |
| Lemont | Opening Soon | Mar 2026 | May 2026 | Lemont, Homer Glen, Lockport (partial) | Get notified ↓ |
| Lyons | Opening Soon | Mar 2026 | May 2026 | Berwyn, Brookfield, Countryside, LaGrange, LaGrange Park, Stickney, Western Springs | Get notified ↓ |
| Orland | Opening Soon | Mar 2026 | May 2026 | Orland Hills, Orland Park, Tinley Park (partial) | Get notified ↓ |
| Palos | Opening Soon | Mar 2026 | May 2026 | Palos Heights, Palos Hills, Palos Park, Willow Springs | Get notified ↓ |
| Stickney | Opening Soon | Apr 2026 | Jun 2026 | Bedford Park, Burbank, Forest View, Oak Lawn (partial), Stickney, Summit | Get notified ↓ |
City Districtnext cycle 2027
| Township | Status | Open | Deadline | Includes | Action |
|---|---|---|---|---|---|
| Chicago (City) | Future cycle | 2027 | — | All Chicago neighborhoods | Not yet |
North Districtnext cycle 2027
| Township | Status | Open | Deadline | Includes | Action |
|---|---|---|---|---|---|
| Barrington | Future cycle | 2027 | — | Barrington, Barrington Hills, Lake Barrington, North Barrington, South Barrington | Not yet |
| Elk Grove | Future cycle | 2027 | — | Elk Grove Village, Schaumburg (partial) | Not yet |
| Evanston | Future cycle | 2027 | — | Evanston | Not yet |
| Maine | Future cycle | 2027 | — | Des Plaines, Glenview, Morton Grove, Niles, Park Ridge | Not yet |
| Niles | Future cycle | 2027 | — | Lincolnwood, Morton Grove, Niles, Skokie (partial) | Not yet |
| New Trier | Future cycle | 2027 | — | Glencoe, Kenilworth, Northfield, Wilmette, Winnetka | Not yet |
| Northfield | Future cycle | 2027 | — | Glenview, Northbrook, Northfield, Prospect Heights, Wheeling | Not yet |
| Palatine | Future cycle | 2027 | — | Arlington Heights (partial), Palatine, Rolling Meadows, Schaumburg (partial) | Not yet |
| Wheeling | Future cycle | 2027 | — | Buffalo Grove, Prospect Heights, Wheeling | Not yet |
Northwest Districtnext cycle 2028
| Township | Status | Open | Deadline | Includes | Action |
|---|---|---|---|---|---|
| Berwyn | Future cycle | 2028 | — | Berwyn, Cicero, Stickney (partial) | Not yet |
| Hanover | Future cycle | 2028 | — | Bartlett, Bloomingdale, Hanover Park, Streamwood | Not yet |
| Oak Park | Future cycle | 2028 | — | Forest Park, Oak Park, River Forest, River Grove | Not yet |
| River Forest | Future cycle | 2028 | — | Elmwood Park, Franklin Park, River Forest, River Grove, Rosemont | Not yet |
| Schaumburg | Future cycle | 2028 | — | Hoffman Estates, Roselle, Schaumburg, Streamwood | Not yet |
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 at cookcountyassessor.com using your address or PIN.
2. Get comparable properties
You need at least 3 sales comps — similar homes that sold recently in your area. OverTaxed IL pulls these automatically from Cook County data.
3. File before your deadline
Submit your appeal online at cookcountyassessor.com/online-appeals. 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.