Cook County Appeal Checker
Cook County property tax appeal deadlines by township
Every township's current appeal window, how many homeowners appealed last year, and how often those who filed alone won.
Free. No sign-up. Compares your assessed value per square foot with 5 to 10 similar homes nearby from the Assessor's own data.
| Township | Status | Appeal rate | Won, filing alone |
|---|---|---|---|
| Barrington | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 54% | 68% |
| Berwyn | The 2026 appeal windows for Berwyn have closed. You can still check the comps now and file next year. | 21% | 47% |
| Bloom | Dates for this township weren't published when our calendar was last updated. | 10% | 49% |
| Bremen | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 13% | 45% |
| Calumet | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 12% | 53% |
| Cicero | The 2026 appeal windows for Cicero have closed. You can still check the comps now and file next year. | 13% | 59% |
| Elk Grove | The 2026 appeal windows for Elk Grove have closed. You can still check the comps now and file next year. | 57% | 71% |
| Evanston | The 2026 appeal windows for Evanston have closed. You can still check the comps now and file next year. | 59% | 61% |
| Hanover | Assessor appeals are open until December 7, 2026. | 38% | 66% |
| Hyde Park | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 12% | 50% |
| Jefferson | Assessor appeals are open until November 12, 2026. | 20% | 61% |
| Lake | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 10% | 58% |
| Lake View | The 2026 appeal windows for Lake View have closed. You can still check the comps now and file next year. | 23% | 53% |
| Lemont | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 24% | 46% |
| Leyden | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 33% | 66% |
| Lyons | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 19% | 44% |
| Maine | The 2026 appeal windows for Maine have closed. You can still check the comps now and file next year. | 52% | 68% |
| New Trier | The 2026 appeal windows for New Trier have closed. You can still check the comps now and file next year. | 69% | 67% |
| Niles | Assessor appeals are open until December 3, 2026. | 49% | 69% |
| North Chicago | Assessor appeals are open until November 24, 2026. | 46% | 31% |
| Northfield | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 67% | 71% |
| Norwood Park | The 2026 appeal windows for Norwood Park have closed. You can still check the comps now and file next year. | 42% | 68% |
| Oak Park | The 2026 appeal windows for Oak Park have closed. You can still check the comps now and file next year. | 24% | 53% |
| Orland | Assessor appeals are open until November 6, 2026. | 19% | 43% |
| Palatine | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 57% | 69% |
| Palos | The 2026 appeal windows for Palos have closed. You can still check the comps now and file next year. | 18% | 44% |
| Proviso | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 15% | 52% |
| Rich | Assessor appeals are open until December 4, 2026. | 16% | 42% |
| River Forest | The 2026 appeal windows for River Forest have closed. You can still check the comps now and file next year. | 29% | 53% |
| Riverside | The 2026 appeal windows for Riverside have closed. You can still check the comps now and file next year. | 19% | 56% |
| Rogers Park | The 2026 appeal windows for Rogers Park have closed. You can still check the comps now and file next year. | 20% | 44% |
| Schaumburg | Assessor appeals are open until November 19, 2026. | 49% | 73% |
| South Chicago | Dates for this township weren't published when our calendar was last updated. | 41% | 48% |
| Stickney | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 13% | 52% |
| Thornton | Assessor appeals are open until November 23, 2026. | 13% | 46% |
| West Chicago | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 22% | 57% |
| Wheeling | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 58% | 70% |
| Worth | The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal. | 11% | 52% |
Dates from the Assessor's calendar; outcomes from the Board of Review's decision data for tax year 2025.