Cook County Board of Review and PTAB appeal guide.
Updated June 2026 - SavePropertyTaxes research
The Cook County Board of Review is not the Assessor. It is a separate review path with its own rules, township windows, hearing choices, evidence deadlines, re-review limits, and PTAB next-step implications.
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Understand township windows, stale official calendar caveats, and the difference between Assessor and Board timing.
Timeline Cook County appeal timelineFollow the township-driven sequence from reassessment notice to Assessor appeal, Board review, PTAB or circuit court, and exemption side paths.
Filing How to file a Cook County appealWalk through the online Assessor appeal workflow, Filing ID, Docket Number, and document timing.
Evidence Cook County appeal evidenceBuild overvaluation, uniformity, incorrect-characteristic, and condition evidence around Cook County rules.
Checklist Cook County evidence checklistOrganize overvaluation, uniformity, property-record, condition, recent-sale, comparable, photo, and permit evidence for Cook review stages.
Template Cook County appeal letter templateUse a copy-ready cover letter structure that points to the Assessor or Board form, evidence, PIN, requested value, and local appeal reason.
Tax breakdown Where Cook County taxes goSeparate assessment value from levies, tax rates, exemptions, and taxing bodies so a high bill turns into the right next step.
Board review Board of Review and PTABSee how the Board of Review differs from the Assessor and what PTAB means after a Board decision.
Exemptions Exemptions and Certificates of ErrorCheck Homeowner, Senior, Senior Freeze, disability, veterans, and missed-exemption refund paths.
Latest county updates
Recent source-backed updates and what they mean for appeal or protest preparation.
Cook County deep dives
Longer explainers on bills, delays, appeals, and exemptions for Cook County homeowners.
Cook County property tax bills keep arriving late because assessments, appeals, exemptions, tax rates, levies, and a troubled technology overhaul all have to line up first.
Appeal timing - 10 min read Delayed Cook County Tax Bills: What Happens to Appeals?Cook County tax bills may be delayed, but assessment appeal deadlines often are not. Learn what delays mean for Assessor appeals, Board filings, PTAB, exemptions, refunds, escrow, and budgeting.
Bill shock - 10 min read You Won Your Cook County Appeal. Why Did the Bill Still Go Up?A Cook County homeowner's guide to the hidden path from assessment appeal to property tax bill: equalization, exemptions, levies, rates, TIFs, and timing.
Second installment - 12 min read Cook County Second Installment Property Tax Bill 2026: What to CheckCook County's 2025 second-installment property tax bills are delayed. Learn what homeowners should check for exemptions, appeals, escrow payments, refunds, and due dates.
The Board is separate from the Assessor
The Board of Review FAQ describes the Board as a separate, quasi-judicial agency independent of the Assessor. The Assessor sets taxable value, while the Board can review the completed assessment and set the final county valuation for that tax year.
That separation matters. The Board FAQ says you can file a Board appeal even if the Assessor granted or denied a reduction.
Homeowners can represent themselves
The Board residential page says individual taxpayers may represent themselves. It also says corporations and LLCs must use an attorney, and a consultant may not represent a homeowner at the Board.
For homeowners, that makes preparation more important than jargon. The written file should make the value problem clear enough for review.
Hearings are optional but evidence timing is not
The Board says residential taxpayers have a right to a hearing but may waive it without penalty. A hearing may help when the property has unusual facts that are hard to convey in writing.
Board rules state that late evidence generally is not accepted. Treat the evidence deadline as a real deadline, not a flexible follow-up date.
Re-review and PTAB are narrow next steps
Board rules describe re-review as similar to a motion to reconsider and not a place for new theories. The rules say requests must be filed within 3 days of the Board decision letter.
After a Board decision, Illinois PTAB may be available for assessment issues. PTAB is not the place for tax rates, bill amounts, or exemption disputes.
Assessor vs Board vs PTAB
| Stage | What it does | What to watch |
|---|---|---|
| Assessor | Initial local assessment review and certification | Township opening and document deadline |
| Board of Review | Separate review that can set final county valuation | Township closing date and evidence deadline |
| Re-review | Narrow Board reconsideration after decision | 3-day rule and no new theory problem |
| PTAB | State assessment appeal after Board decision | Assessment-only jurisdiction and separate filing requirements |
How to think about a Board complaint
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1
Confirm township status
The Board opens townships after Assessor assessment and says dates vary annually.
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2
File the complaint
Use the official form or online system before the township closing date.
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3
Submit evidence
Use comps, sales, appraisals, property facts, photos, or other documents by the evidence deadline.
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4
Choose hearing or desk review
A hearing is optional, and waiving it should not be penalized.
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5
Review the decision
If the decision is wrong, evaluate re-review or PTAB quickly.
Board-ready file checklist
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Complaint number and PIN
Keep identifiers visible across the packet.
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Short basis for relief
State whether the issue is market value, equity, facts, or another assessment issue.
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Labeled exhibits
Make comps, photos, appraisals, and sale documents easy to scan.
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Hearing decision
Attend if you need to explain unique facts that the written file does not make obvious.
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Decision-letter deadline
If considering re-review or PTAB, preserve the decision letter and postmark details.