CHICAGOLAND PROPERTY TAX APPEALS

Lower Your Property Tax Bill

Appeal an inflated residential or commercial assessment in Cook, DuPage, Lake, or Will County. You pay an attorney fee only if Younis Law Group lowers your property tax bill.

FREE REVIEW • RESIDENTIAL & COMMERCIAL • LOCAL DEADLINES APPLY

FREE PROPERTY TAX APPEAL REVIEW

Could your assessment be too high?

Tell us about the property. We’ll review it and contact you about your options.

CONFIDENTIAL INTAKE

Confidential inquiry. No reduction, no attorney fee.

2026 DEADLINE TRACKER · VERIFIED AUGUST 6, 2026

2026 Chicagoland property tax appeal deadlines

As of August 6, 2026, Cook County Assessor appeals are open in Stickney through August 12, West Chicago through August 21, Lyons through September 3, and Northfield through September 4. Lake County appeals are open in Benton and Ela through August 24 and in Warren and Waukegan through September 8. Will County opens August 12, and DuPage township dates remain pending.

Deadlines can change. Confirm the date for your property before filing; this tracker is informational and is not legal advice.

QUICK ANSWERS

What are the 2026 Chicagoland property tax appeal deadlines?

As of August 6, Cook County Assessor appeals are open in Stickney through August 12, West Chicago through August 21, Lyons through September 3, and Northfield through September 4. Lake County appeals are open in Benton and Ela through August 24 and in Warren and Waukegan through September 8. Will County opens August 12; DuPage township dates remain pending.

How do I know which deadline applies to my property?

The controlling window is usually tied to the county and township where the property is assessed. Confirm the township using the property PIN, then use the official source linked on the matching record below.

What happens if my township’s deadline recently closed?

You generally cannot use a filing window after it closes. A later Board of Review window or another remedy may be available, but eligibility and timing differ by county and property, so confirm the next official deadline promptly.

Will a successful appeal lower my property tax bill?

An appeal challenges the property’s assessed value, not the bill directly. A lower assessment can reduce the resulting tax bill, but the final amount also depends on tax rates, exemptions, and other factors.

What evidence should I gather before filing?

Residential appeals commonly use comparable sales, comparable assessments, and property-record corrections. Commercial appeals may also require income and expense statements, rent rolls, vacancy evidence, or an appraisal.

2026 DEADLINE STATUS

Find the deadline that applies to your property

Township and county schedules differ. Start with Open now, then review Opening soon, Recently closed, and Dates pending. Every record links to the official county source.

Lake County lists August 6, 2026 as the publication date and September 8, 2026 as the final filing date.

View official county source

Which property tax appeal deadlines are opening soon?

These windows have official opening and closing dates but are not yet accepting filings.

Upcoming

Will County 2026 Filing Window

The countywide complaint portal is scheduled to accept submissions from August 12 through September 14.

View official county source →

The 2026 Cook County Assessor filing deadline was July 13. Check the official calendar for the next review stage.

View official county source →

Which county has not announced all 2026 appeal dates?

No filing date is shown until an official county source publishes it. Pending records are rechecked every week.

Dates pending

DuPage County Township Dates

DuPage deadlines are township-specific. This tracker will add exact 2026 dates when the county publishes each assessment roll.

View official county source →

WHAT TO DO NEXT

A deadline is only the first decision

Before filing, compare the assessed value with recent sales, review the property record for errors, and decide whether comparable properties support an equity argument. Commercial appeals may also require income, expense, rent-roll, appraisal, or vacancy evidence.

Think your property is over-assessed?

Younis Law Group handles residential and commercial property tax appeals across Chicagoland.

Request a free appeal review →

Can a property tax appeal lower my bill?

Yes. If your residential or commercial property is assessed too high, an appeal can reduce the assessed value used to calculate your property tax bill. Results depend on the evidence, timing, and local appeal process.

How much does a property tax appeal cost?

Younis Law Group handles property tax appeals on a contingency basis: you pay an attorney fee only if we reduce your property tax bill.

Which counties and property types do you handle?

We represent homeowners and commercial property owners in Cook, DuPage, Lake, and Will counties, including houses, condominiums, apartment buildings, retail, office, and industrial property.

What does Younis Law Group do for my appeal?

We review your assessment, research comparable properties, prepare and file the appeal, present the evidence, and track the decision. County and township deadlines can be short, so request a review as early as possible.

What information do I need to get started?

Send the property owner’s name, property address, city, phone number, and email in the form above. We will review the property and contact you about possible next steps.

Can a property tax appeal lower my bill?

How much does a property tax appeal cost?

Younis Law Group handles property tax appeals on a contingency basis: you pay an attorney fee only if we reduce your property tax bill.

Which counties and property types do you handle?

We represent homeowners and commercial property owners in Cook, DuPage, Lake, and Will counties, including houses, condominiums, apartment buildings, retail, office, and industrial property.

What does Younis Law Group do for my appeal?

What information do I need to get started?

Send the property owner’s name, property address, city, phone number, and email in the form above. We will review the property and contact you about possible next steps.