Cook County 2025 Property Tax Bills Delayed — Start Planning Your 2026 Appeal Now

Cook County property owners will receive their First Installment 2025 property tax bills later than usual.

• Mailing Date: March 2, 2026
• Due Date: April 1, 2026

This delay is due to the late issuance of the 2024 Second Installment bills.

While you’re preparing to pay your 2025 property taxes, now is the time to start preparing your Cook County property tax appeal for 2026.

2026 Reassessment: South District Property Owners Take Action

The Cook County Board of Review has closed its final 2025 appeal session. Appeal windows move quickly, and missing a deadline can cost you a year of potential savings.

If your property is located in the South District, 2026 is especially important. The following townships are up for reassessment:

• Berwyn
• Bloom
• Bremen
• Calumet
• Cicero
• Lemont
• Lyons
• Oak Park
• Orland
• Palos
• Proviso
• Rich
• River Forest
• Riverside
• Stickney
• Thornton
• Worth

A successful property tax appeal in 2026 could generate savings that last until 2029.

Reassessment Cycle Impact on Savings

• South District: Savings may last 3 years
• North District: Savings may last 2 years
• City of Chicago: Savings typically last 1 year (reassessment in 2027)

No matter where your property is located, appealing your assessment every year helps protect your investment.

Kensington Research & Recovery has helped Cook County property owners reduce their assessed values since 1999.

Don’t Overlook 2025 Property Tax Exemptions

In addition to filing a property tax appeal, make sure you are receiving all eligible exemptions. The 2025 exemption filing period opens in March.

Homeowner Exemption

You qualify if:

• You own the property
• You occupy it as your primary residence

Senior Exemption

You qualify if:

• You are 65 or older
• You own and occupy the property as your primary residence

These exemptions can be combined to maximize your property tax savings.

Get a FREE Cook County Property Tax Analysis

Don’t wait for appeal windows to open

Get ahead of the 2026 property tax appeal cycle with a FREE property tax analysis from Kensington Research & Recovery. Once 2026 assessment data becomes available, we will review your property and determine whether you have a strong basis for appeal.

There are no small arguments.
Every dollar saved matters.

Get Your Free Property Tax Reduction Estimate