Cook County Property Tax Appeal Blog & Resources

Wheeling's Assessor (CCAO) appeal window closed October 22, 2026. The Board of Review dates are not published yet.

Lake's Assessor (CCAO) appeal window closed October 29, 2026. The Board of Review dates are not published yet.

What PTAB is, the 30-day deadline after a Cook County Board of Review decision, what it costs, how long it takes, and when the Circuit Court fits instead.

Proviso's Assessor (CCAO) appeal window closed October 27, 2026. The Board of Review dates are not published yet.

The Assessor's 2026 reassessment raised the median home assessment 22% in Worth, 25% in Lyons, 24% in Palos and Berwyn. Township-by-township numbers and what to do before the window closes.

Berwyn's Board of Review appeal window closed September 29, 2026. What an owner can still do.

Elk Grove's Board of Review appeal window closed September 29, 2026. What an owner can still do.

Hyde Park's Assessor (CCAO) appeal window closed October 8, 2026. The Board of Review dates are not published yet.

How the Cook County Board of Review works, its 2026 windows, what it reduced last year (59% of north suburban appeals) and how to file online or in person.

Lyons' 2026 reassessment raised the median home assessment 25.1%. The Assessor window closed September 3; the Board of Review window is open through November 6.

Lake View's Board of Review appeal window closed September 29, 2026. What an owner can still do.

Maine's Board of Review appeal window closed September 29, 2026. What an owner can still do.

Cicero's Board of Review appeal window closed September 29, 2026. What an owner can still do.

Palos's Board of Review appeal window closed September 29, 2026. What an owner can still do.

Leyden's Assessor (CCAO) appeal window closed October 14, 2026. The Board of Review dates are not published yet.

Worth's 2026 reassessment raised the median home assessment 22.2%, with 97% of homes up. The Assessor window closed October 15; the Board of Review is next.

64,911 residential Assessor appeals decided for 2026 so far: 18.8% reduced, average cut 8.1%. By township, from 34% in River Forest to 9% in Rogers Park.

The Senior Freeze holds a qualifying senior's equalized assessed value at a base year. Age 65+, household income of $65,000 or less for the 2025 tax year ($75,000 for 2026), principal residence, and a new application every year. What it does, what it does not, and how it works with an appeal in a reassessment year.

A Certificate of Error corrects a Cook County tax bill that has already been issued: a missing Homeowner, Senior or Senior Freeze exemption, or a factual error in the assessment. Who issues it, how far back it reaches, how the Treasurer refunds it, and how it differs from an appeal.

Worth's Assessor (CCAO) appeal window closed October 15, 2026. The Board of Review dates are not published yet.