Assessment Calendar and Deadlines

The 2021 assessment and appeal schedule coincides with the implementation of iasWorld, a new integrated property tax system. 

This upgrade moves us off an aging mainframe system onto a state-of-the-art platform that allows property owners to more easily access and update property data.

Therefore, assessment mailing dates and appeal dates are subject to change. Please plan accordingly. Information will be published as it becomes available. Our phone lines remain open to the public during normal business hours and assistance is available via our website and social media channels.

Last updated: 11/24/2021 - Note that values may take 24 hours to update online from the mail date.

Assessment Calendar: City of Chicago

Township Reassessment Notice Mail Date Last Day to File CCAO Appeal  Date A-Roll Certified Date A-Roll Published Board of Review appeal  dates Pass
Rogers Park 6/15/2021  7/19/2021       1
West Chicago 7/21/2021 8/23/2021       1
Jefferson 8/16/2021 9/17/2021       1
North 9/17/2021 10/19/2021       1
South 9/30/2021 11/1/2021       1
Lake 11/4/2021 12/6/2021       1
Lake View 11/22/2021 12/23/2021       1
Hyde Park TBD          

* Tentative. The date is subject to change.

** Due to a delay with our mail house vendor, Rogers Park assessments will not mail on 6/11 as initially planned. Values will not be available online or in the data subscription service and appeals cannot be filed. We anticipate mailing notices within 1-2 business days, which will be when updated values post online and in the data subscription service. Filing of Rogers Park appeals will be available at that time. We will post an update as soon as it is available.


Assessment Calendar: Suburbs (North, South, and West)

In the North Suburban and South and West Suburban townships, individual properties will only be reassessed only if there is a change due to division work, permit applications, or other special applications.

Note that values may take 24 hours to update online from the mail date.

Township Reassessment Notice Mail Date Last Day to File CCAO Appeal  Date A-Roll Certified Date A-Roll Published Board of Review Appeal Dates Pass
River Forest 4/21/2021 5/21/2021 11/15/2021 12/02/2021 TBD 2
Riverside 4/22/2021 5/22/2021 11/16/2021 12/02/2021 TBD 2
Evanston 5/7/2021 6/7/2021       1
Oak Park 5/17/2021 6/16/2021 11/24/2021 12/01/2021 TBD 2
Norwood Park 5/17/2021 6/16/2021 11/17/2021 12/02/2021 TBD 2
Berwyn 6/1/2021 7/1/2021       1
New Trier 6/1/2021 7/1/2021       1
Cicero 6/8/2021 7/9/2021       1
Palatine 6/14/2021 7/16/2021       1
Schaumburg 6/16/2021 7/19/2021       1
Elk Grove 6/28/2021 7/29/2021       1
Orland 7/2/2021 8/3/2021       1
Calumet 7/2/2021 8/3/2021       1
Hanover 7/14/2021 8/16/2021       1
Barrington 7/14/2021 8/16/2021       1
Bloom 7/23/2021 8/23/2021       1
Maine 7/23/2021 8/23/2021       1
Thornton 8/9/2021 9/9/2021       1
Palos 8/12/2021 9/13/2021       1
Lemont 8/14/2021 9/14/2021       1
Worth 8/24/2021 9/24/2021       1
Leyden 8/30/2021 9/30/2021       1
Northfield 9/3/2021 10/04/2021       1
Bremen 9/15/2021 10/18/2021       1
Lyons 9/21/2021 10/25/2021       1
Wheeling 10/05/2021 11/05/2021       1
Proviso 10/08/2021 11/08/2021       1
Stickney
(Deadline extended)
10/14/2021 11/29/2021       1
Rich  10/26/2021 11/29/2021       1
Niles 11/1/2021 12/03/2021       1

DATA UPDATE: Data in the subscription service for Niles, Stickney, and Rich has been revised to include previously missing data. Niles, Stickney, Rich, and Lake Township data is now in the subscription service and on the website.

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* Tentative. The date is subject to change. 

Past Calendars:

2020 Assessment Calendar and Deadlines

2019 Assessment Calendar and Deadlines

2018 Assessment Calendar and Deadlines 

Other relevant information:

2021 CCAO Appeal Rules
2021 Practitioners Meeting Presentation Slides >> and Video >>

Commercial real estate participants: Market Analyst Day Presentations
Submit RPIE valuations data