All 38 Cook County townships

Cook County property tax appeal deadlines by township

Cook County appeals move township by township. Find your township below, verify the current filing stage, or search your property first if you only have an address or PIN.

Check your property

Have an address or PIN? Search the property first.

Enter a Cook County address or 14-digit PIN to inspect the assessment and comparable evidence before you spend time figuring out the filing path.

Free to check first. No credit card required.

Assessor open10 townships

Board open4 townships

Board pre-file11 townships

Published windows closed13 townships

Current-year analysis is shown only when the active Cook County data snapshot supports the property. Search the property to confirm availability.

Assessor windows open now

These township Assessor windows are open in the current 2026 calendar. Official Cook County dates control.

Palatine Township Assessor through Nov 4Orland Township Assessor through Nov 6Jefferson Township Assessor through Nov 12Schaumburg Township Assessor through Nov 19Thornton Township Assessor through Nov 23North Chicago Township Assessor through Nov 24Niles Township Assessor through Dec 3Rich Township Assessor through Dec 4Hanover Township Assessor through Dec 7South Chicago Township Assessor through Dec 15

Board of Review windows open now

The Board is a separate appeal stage. These published formal Board windows are open now.

Lyons Township Board through Nov 6Northfield Township Board through Nov 6Stickney Township Board through Nov 6West Chicago Township Board through Nov 6

Check current Board dates ↗ Understand Board pre-file / preregistration →

Board of Review pre-file available now

For townships that have not yet opened a formal 2026 Board filing window, the Board currently directs homeowners to pre-file or preregister. The all-township list below marks those townships explicitly.

How Board pre-file works → Verify current Board status ↗

All 38 township appeal guides

Each page has the same job: answer the township deadline question quickly, show the next filing stage, and let you search the actual property without leaving the guide.

Townships still awaiting a published Assessor date in this guide

These pages are live so homeowners can find the correct township resource and search their property, but no Assessor deadline is being invented. Verify the official calendar before filing.

Bloom

Why township timing matters

The Assessor does not use one countywide residential appeal deadline. Filing windows are township-specific. The Board likewise publishes separate township filing periods, and the two stages are independent.

Understand the Assessor → Board deadline sequence →

Check your property

Check the property, then preserve the right filing opportunity.

Search my property

Status uses the Chicago/Central calendar date. Official Cook County calendars and filing systems control; verify them before filing.