Some Sites We Recommend
Cook County Assessor
https://www.cookcountyassessoril.gov
Assessor’s Exemption Forms
https://www.cookcountyassessoril.gov/exemptions
Cook County Board of Review
https://www.cookcountyboardofreview.com
Cook County Property Tax Portal
https://www.cookcountypropertyinfo.com
Cook County Treasurer
https://cookcountytreasurer.com
Cook County Clerk
https://www.cookcountyclerkil.gov
Cook County Recorder of Deeds (now part of the Cook County Clerk)
https://crs.cookcountyclerkil.gov/Search
Illinois Property Tax Appeal Board
https://www.ptab.illinois.gov
Lake County Assessment Information
https://www.lakecountyil.gov/4915/Chief-County-Assessor
Lake County Filing Deadlines
https://www.lakecountyil.gov/527/Filing-Deadlines-and-Decision-Mailed-Dat
McHenry County Filing Deadlines
https://www.mchenrycountyil.gov/departments/assessments/board-of-review
Will County Filing Deadlines
https://www.willcountysoa.com/PublicationSchedule
Kane County Filing Deadlines
https://assessments.kanecountyil.gov/Pages/Deadline.aspx
DuPage County Filing Deadlines
https://www.dupagecounty.gov/government/departments/supervisor_of_assessments/assessment_status.php