First-Time Commercial Owners

First-Time Commercial Property Owners

You just acquired a commercial property in Cook County. Congratulations — and welcome to one of the most complex property tax systems in the country. If you’ve never navigated an Illinois property tax appeal, you’re not alone. Most first-time owners don’t realize they have the right to challenge their assessment, or that doing so could save them tens of thousands of dollars.

What New Owners Need to Know

Your assessment may not reflect what you paid.

Cook County reassesses commercial properties on a triennial cycle. If your purchase occurred between reassessment periods, your assessment may still reflect the previous owner’s value — which could be significantly higher or lower than your acquisition price. Either way, it’s likely wrong.

The Assessor doesn’t know your property.

Mass appraisal models use broad averages. They don’t account for deferred maintenance, below-market leases, high vacancy, environmental issues, or functional obsolescence that may affect your specific building. If any of these apply, you’re almost certainly over-assessed.

There’s no downside to appealing.

Under Illinois law, filing an appeal cannot increase your assessment. The worst-case outcome is that your value stays the same. There is no penalty, no flag on your property, and no negative consequence.

Common Questions from First-Time Owners

Do I need to wait until the next reassessment?
No. You can file an appeal during any open filing period, even outside your reassessment year. The Board of Review accepts appeals annually.

What do I need to provide?
Just your property address or PIN, and ideally your most recent tax bill or closing statement. We handle all the research, filings, and hearings from there.

How much does it cost?
We work on a contingency basis — you pay nothing unless we successfully reduce your assessment. No retainer, no upfront costs, no hidden fees.

How long does it take?
Most appeals at the Assessor or Board of Review level are resolved within 2–6 months. We keep you informed at every stage through our client portal.

Free Resource: The New Owner’s Guide

We created a comprehensive guide specifically for commercial property owners who are new to the Illinois tax appeal process. It covers how assessments work, when to appeal, how to build a strong case, and what to look for in a tax appeals firm.

Get Started with a Free Assessment Review

Whether you closed last week or last year, it’s worth getting a professional review of your assessment. We’ll tell you if you’re overpaying and what we can do about it — at no cost to you.

Call 312.648.6184 or request your free review online.