River Forest Township appeal deadline
Cook County, Illinois · 2026 assessment year
Dates
Assessor's Office
ClosedApril 20, 2026 to June 2, 2026
Board of Review
ClosedAugust 3, 2026 to September 1, 2026
Dates are copied from the Assessor's calendar and checked by hand only periodically. Confirm yours on cookcountyassessoril.gov before you rely on it.
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Two free levels
Cook County hears property tax appeals at two levels, both free to file and both open to homeowners filing for themselves: first the Assessor's Office, then the Board of Review. Each has its own window for each township.