2026 Assessment Cycle — Cook County

Appeal Schedule & Deadlines

Complete CCAO assessor windows + Cook County Board of Review filing, evidence, and re-review dates for all 38 townships.

Township	Reassessment?	CCAO Filing Dates	Deadline	Triennial	Reassessment Period
Cicero	Yes	6/17/26 – 7/31/26	7/29/26	South	2026–2028
Elk Grove	No	6/22/26 – 8/4/26	8/2/26	North	2025–2027
Stickney	Yes	6/29/26 – 8/12/26	8/10/26	South	2026–2028
West Chicago	No	7/10/26 – 8/21/26	8/19/26	City	2024–2026
Lyons	Yes	7/23/26 – 9/3/26	9/1/26	South	2026–2028
Northfield	No	7/24/26 – 9/4/26	9/2/26	North	2025–2027
Norwood Park	No	4/13/26 – 5/26/26	5/24/26	North	2025–2027
Rogers Park	No	4/17/26 – 6/1/26	5/30/26	City	2024–2026
River Forest	Yes	4/20/26 – 6/2/26	5/31/26	South	2026–2028
Evanston	No	4/22/26 – 6/4/26	6/2/26	North	2025–2027
Riverside	Yes	4/24/26 – 6/8/26	6/6/26	South	2026–2028
Oak Park	Yes	5/6/26 – 6/18/26	6/16/26	South	2026–2028
New Trier	No	5/7/26 – 6/22/26	6/20/26	North	2025–2027
Berwyn	Yes	5/20/26 – 7/6/26	7/4/26	South	2026–2028
Lake View	No	5/28/26 – 7/13/26	7/11/26	City	2024–2026
Palos	Yes	6/3/26 – 7/17/26	7/15/26	South	2026–2028
Maine	No	6/5/26 – 7/21/26	7/19/26	North	2025–2027
Barrington	No	—	—	North	2025–2027
Bloom	Yes	—	—	South	2026–2028
Bremen	Yes	—	—	South	2026–2028
Calumet	Yes	—	—	South	2026–2028
Hanover	No	—	—	North	2025–2027
Hyde Park	No	—	—	City	2024–2026
Jefferson	No	—	—	City	2024–2026
Lake	No	—	—	City	2024–2026
Lemont	Yes	—	—	South	2026–2028
Leyden	No	—	—	North	2025–2027
Niles	No	—	—	North	2025–2027
North Chicago	No	—	—	City	2024–2026
Orland	Yes	—	—	South	2026–2028
Palatine	No	—	—	North	2025–2027
Proviso	Yes	—	—	South	2026–2028
Rich	Yes	—	—	South	2026–2028
Schaumburg	No	—	—	North	2025–2027
South Chicago	No	—	—	City	2024–2026
Thornton	Yes	—	—	South	2026–2028
Wheeling	No	—	—	North	2025–2027
Worth	Yes	—	—	South	2026–2028

* 2026 dates updated from CCAO live calendar (July 27, 2026). Currently open: Cicero, Elk Grove, Lyons, Northfield, Stickney, West Chicago. Unpublished Assessor filing deadlines are omitted until the official CCAO calendar publishes them. Check CCAO calendar for official updates.

BOR Group 1 BOR Filing 7/7/25–8/5/25 · Re-Review 2/3/26 – 2/5/26 · 6 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Berwyn	2023	2023–2025	South	3/25/25 – 5/6/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
Evanston	2025	2025–2027	North	4/9/25 – 5/21/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
Norwood Park	2025	2025–2027	North	3/24/25 – 5/5/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
River Forest	2023	2023–2025	South	3/7/25 – 4/18/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
Riverside	2023	2023–2025	South	3/7/25 – 4/18/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
Rogers Park	2024	2024–2026	City	3/12/25 – 4/23/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
BOR Group 2a BOR Filing 7/21/25–8/19/25 · Re-Review 2/9/26 – 2/11/26 · 3 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Cicero	2023	2023–2025	South	4/24/25 – 6/6/25	Closed	7/21/25 – 8/19/25 12/3/25 – 12/12/25	8/29/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
Oak Park	2023	2023–2025	South	4/8/25 – 5/20/25	Closed	7/21/25 – 8/19/25 12/3/25 – 12/12/25	8/29/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
Palos	2023	2023–2025	South	4/19/25 – 6/2/25	Closed	7/21/25 – 8/19/25 12/3/25 – 12/12/25	8/29/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
BOR Group 2b BOR Filing 8/18/25–9/16/25 · Re-Review 2/9/26 – 2/11/26 · 4 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Elk Grove	2025	2025–2027	North	5/6/25 – 6/18/25	Closed	8/18/25 – 9/16/25 12/3/25 – 12/12/25	9/26/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
Lake View	2024	2024–2026	City	5/23/25 – 7/9/25	Closed	8/18/25 – 9/16/25 12/3/25 – 12/12/25	9/26/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
Lyons	2023	2023–2025	South	6/2/25 – 7/16/25	Closed	8/18/25 – 9/16/25 12/3/25 – 12/12/25	9/26/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
New Trier	2025	2025–2027	North	4/23/25 – 6/5/25	Closed	8/18/25 – 9/16/25 12/3/25 – 12/12/25	9/26/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
BOR Group 3 BOR Filing 9/22/25–10/21/25 · Re-Review 2/18/26 – 2/20/26 · 5 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Barrington	2025	2025–2027	North	7/3/25 – 8/15/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
Maine	2025	2025–2027	North	6/4/25 – 7/18/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
Northfield	2025	2025–2027	North	6/17/25 – 7/31/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
Stickney	2023	2023–2025	South	6/11/25 – 7/25/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
West Chicago	2024	2024–2026	City	7/9/25 – 8/20/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
BOR Group 4 BOR Filing 10/23/25–11/21/25 · Re-Review 3/17/26 – 3/19/26 · 6 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Bremen	2023	2023–2025	South	7/10/25 – 8/21/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Calumet	2023	2023–2025	South	7/30/25 – 9/11/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Hyde Park	2024	2024–2026	City	8/4/25 – 9/16/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Lemont	2023	2023–2025	South	7/21/25 – 9/2/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Leyden	2025	2025–2027	North	7/21/25 – 9/2/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Worth	2023	2023–2025	South	8/11/25 – 9/23/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
BOR Group 5 BOR Filing 11/20/25–12/19/25 · Re-Review 4/13/26 – 4/15/26 · 3 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Jefferson	2024	2024–2026	City	8/21/25 – 10/3/25	Closed	11/20/25 – 12/19/25	12/29/25	3/23/26 – 3/26/26	4/13/26 – 4/15/26	Closed
Proviso	2023	2023–2025	South	8/25/25 – 10/7/25	Closed	11/20/25 – 12/19/25	12/29/25	3/23/26 – 3/26/26	4/13/26 – 4/15/26	Closed
Wheeling	2025	2025–2027	North	8/18/25 – 9/30/25	Closed	11/20/25 – 12/19/25	12/29/25	3/23/26 – 3/26/26	4/13/26 – 4/15/26	Closed
BOR Group 6 BOR Filing 1/5/26–2/3/26 · Re-Review 5/11/26 – 5/13/26 · 5 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Lake	2024	2024–2026	City	9/22/25 – 11/4/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	5/11/26 – 5/13/26	Closed
Orland	2023	2023–2025	South	9/10/25 – 10/23/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	5/11/26 – 5/13/26	Closed
Palatine	2025	2025–2027	North	9/9/25 – 10/22/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	5/11/26 – 5/13/26	Closed
Schaumburg	2025	2025–2027	North	10/2/25 – 11/17/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	5/11/26 – 5/13/26	Closed
Thornton	2023	2023–2025	South	10/1/25 – 11/14/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	5/11/26 – 5/13/26	Closed
BOR Group 7 BOR Filing 1/20/26–2/18/26 · Re-Review 6/1/26 – 6/3/26 · 6 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Bloom	2023	2023–2025	South	10/24/25 – 12/9/25	Closed	1/20/26 – 2/18/26	2/28/26	5/11/26 – 5/20/26	6/1/26 – 6/3/26	Closed
Hanover	2025	2025–2027	North	11/6/25 – 12/22/25	Closed	1/20/26 – 2/18/26	2/28/26	5/11/26 – 5/20/26	6/1/26 – 6/3/26	Closed
Niles	2025	2025–2027	North	10/22/25 – 12/5/25	Closed	1/20/26 – 2/18/26	2/28/26	5/11/26 – 5/20/26	6/1/26 – 6/3/26	Closed
North Chicago	2024	2024–2026	City	10/7/25 – 11/20/25	Closed	1/20/26 – 2/18/26	2/28/26	5/11/26 – 5/20/26	6/1/26 – 6/3/26	Closed
Rich	2023	2023–2025	South	10/21/25 – 12/4/25	Closed	1/20/26 – 2/18/26	2/28/26	5/11/26 – 5/20/26	6/1/26 – 6/3/26	Closed
South Chicago	2024	2024–2026	City	10/15/25 – 11/28/25	Closed	1/20/26 – 2/18/26	2/28/26	5/11/26 – 5/20/26	6/1/26 – 6/3/26	Closed

Appeal Schedule & Deadlines

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