2026 Cook County South District Reassessment: What Homeowners Need to Know

Cook County reassesses one district each year, and 2026 is the reassessment year for the South District. If you own property in one of the reassessed townships, you’ll receive a new reassessment notice this year.

Which Townships Are Being Reassessed?

The South District includes 17 of Cook County’s 38 townships:

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

All properties in these townships will be reassessed in 2026.

What a Reassessment Means for Your Property Taxes

Your new assessed value can affect your future tax bills, but it does not determine them by itself. In general, if your assessment increases more than similar homes in your area, your share of the tax burden may increase. If it rises less than comparable properties—or stays relatively in line—you may see little change, depending on exemptions, tax rates, and any appeal results.

At Kensington Research & Recovery, we can take a second look at your new assessment to determine whether you’re being assessed fairly.

Free Assessment Review

Our Research Team provides a free, in‑depth analysis to determine whether you have grounds to appeal your 2026 assessment.

How Long Do Savings Last?

If your appeal is successful, the reduced assessment often benefits you throughout the current three-year reassessment cycle, until the next scheduled reassessment in 2029, unless there are later changes to the property or assessment record.

In many cases, savings would begin appearing on the 2027 second installment tax bill and may continue into 2028 and 2029.

Get Your Free Property Tax Appeal Estimate

If you’d like us to review your new assessment and determine whether an appeal makes sense, click the link below to get started. Our team has helped Cook County homeowners for over 20 years and can guide you through the 2026 reassessment with confidence.

Get Your Free Property Tax Reduction Estimate