2023 Cook County Property Tax Appeal Dates and Deadlines
| Township |
Assessment Notices Mailed |
Assessor’s Appeal Period Closed | Board of Review Appeals Open |
Board of Review Appeals Closed |
| Barrington | 4/5/23 | 5/5/23 | 9/11/23 | 10/10/23 |
| Berwyn | 4/24/23 | 5/24/23 | 9/18/23 | 10/17/23 |
| Bloom | 6/23/23 | 7/26/23 | 11/13/23 | 12/12/23 |
| Bremen | 8/31/23 | 10/2/23 | 12/4/23 | 1/2/24 |
| Calumet | 3/30/23 | 5/1/23 | 9/11/23 | 10/10/23 |
| Cicero | 4/17/23 | 5/17/23 | 9/18/23 | 10/17/23 |
| Elk Grove | 7/6/23 | 8/7/23 | 11/13/23 | 12/12/23 |
| Evanston | 6/6/23 | 7/5/23 | 10/5/23 | 11/3/23 |
| Hanover | 4/17/23 | 5/17/23 | 9/18/23 | 10/17/23 |
| Hyde Park | 9/18/23 | 10/19/23 | ||
| Jefferson | 8/31/23 | 10/2/23 | ||
| Lake | 11/1/23 | 12/5/23 | ||
| Lake View | 8/21/23 | 9/21/23 | 12/4/23 | 1/2/24 |
| Lemont | 5/9/23 | 6/9/23 | ||
| Leyden | 8/16/23 | 9/18/23 | 12/4/23 | 1/2/24 |
| Lyons | 10/24/23 | 11/27/23 | ||
| Maine | 8/7/23 | 9/8/23 | 11/13/23 | 12/12/23 |
| New Trier | 5/24/23 | 6/29/23 | 10/5/23 | 11/3/23 |
| Niles | 9/19/23 | 10/20/23 | ||
| North | 10/4/23 | 11/6/23 | ||
| Northfield | 10/25/23 | 11/28/23 | ||
| Norwood Park | 3/29/23 | 4/29/23 | 9/11/23 | 10/10/23 |
| Oak Park | 4/13/23 | 5/15/23 | ||
| Orland | 5/24/23 | 6/29/23 | 10/5/23 | 11/3/23 |
| Palatine | 7/21/23 | 8/21/23 | 11/13/23 | 12/12/23 |
| Palos | 7/14/23 | 8/14/23 | 11/13/23 | 12/12/23 |
| Proviso | 9/29/23 | 10/30/23 | ||
| Rich | 9/20/23 | 10/23/23 | ||
| River Forest | 4/27/23 | 5/30/23 | 9/18/23 | 10/17/23 |
| Riverside | 3/30/23 | 4/29/23 | 9/11/23 | 10/10/23 |
| Rogers Park | 4/25/23 | 5/25/23 | 9/18/23 | 10/17/23 |
| Schaumburg | 5/10/23 | 6/12/23 | 10/5/23 | 11/3/23 |
| South | 10/6/23 | 11/7/23 | ||
| Stickney | 8/11/23 | 9/12/23 | 12/4/23 | 1/2/24 |
| Thornton | 8/4/23 | 9/5/23 | 11/13/23 | 12/12/23 |
| West | 8/10/23 | 9/11/23 | 12/4/23 | 1/2/24 |
| Wheeling | 8/31/23 | 10/2/23 | ||
| Worth | 11/7/23 | 12/11/23 |