Compare your Cook County assessment against nearby properties to see if you're overpaying Property Taxes
Appeal windows depend on township and publication dates. Use the official Cook County calendar before making filing decisions.
Appeal windows are typically 30 days from publication
Each township has different appeal periods throughout the year
Start with public data, then decide whether you want to file yourself or request help.
Look at your Cook County property alongside nearby parcels and start building a clearer picture of whether the assessment deserves a closer review.
Open the ToolAppeal timing depends on township publication dates. We point you toward the official Cook County calendar and explain what to check before filing.
Learn the ProcessFiling directly with the Assessor is free. If you want help organizing the request, our assisted appeal option is a flat $99.
View Appeal HelpLog in to keep property addresses and appeal requests in one private account dashboard.
LoginA property tax appeal may be worth reviewing when your assessed value appears high compared with similar nearby properties. The county decides the outcome, so the goal is to organize evidence clearly, not promise a reduction.
Review assessment patterns near your property and look for comparable homes that may support your position.
Appeal windows vary by township and are published by Cook County. Always confirm dates with the official calendar.
You can file directly for free or request paid help preparing an appeal request.
Transparent options for Cook County homeowners before we have public case results to share.
Use the property comparison tool to review nearby assessments, understand the data, and decide whether you want to research an appeal yourself.
Join the waitlist for a $99 property tax appeal service through attorney partnerships. If the first appeal is unsuccessful, a second appeal is planned for the next eligible window.
$99 Attorney Appeal Click to Join the WaitlistThese tools are useful for investors and homeowners, but the main service here is Cook County assessment comparison and appeal help.
Estimate NOI, cap rate, and cash-on-cash return for a real estate investment.
Open ROI Calculator → Mortgage ToolReview loan payments, maturity, and amortization details for a mortgage scenario.
Open Loan Tool → Tax TutorialWalk through Cook County's tax calculation steps with a simple interactive example.
Open Tax Calculator →Searchers often want a quick calculator, but a useful comparison starts with the property record, assessed value, property class, and nearby parcels that are genuinely similar.
Use the property address to find the Cook County PIN, then confirm the official property record. PIN-based matching is more reliable than address text alone because one address can have formatting differences across data sources.
Review nearby properties with similar class, building size, age, and location. A lower assessment on a truly comparable property can be a useful signal, while broad neighborhood averages are only a starting point.
Appeal deadlines and filing rules change by township and agency. Always check official Cook County Assessor or Board of Review information before relying on any comparison for a filing decision.
Cook County Tax Compare is designed around public Cook County property, assessment, and appeal information. The tool helps organize comparison signals, but final values, deadlines, exemptions, and filing requirements should be verified through official Cook County records.
Everything you need to know about property taxes, appeals, and our tools.
The best way is to compare your property's assessed value per square foot to similar properties in your neighborhood using our Property Tax Tool. If your neighbors with similar homes are assessed significantly lower, you likely have grounds for an appeal.
Filing an appeal directly with the Cook County Assessor's Office is completely free. You do not need to hire an attorney to file an appeal, especially for residential properties. Our tools can help you review public data, and our optional appeal help is a flat $99.
Appeal windows are open for specific townships at different times of the year, usually for a period of 30 days. Check our "Appeal Deadlines" section or the official Assessor's website to see if your township is currently open for appeals.
We use public Cook County data sources where available. Always verify final numbers, deadlines, and filing requirements with official county records before submitting an appeal.
We are building a simple flat-fee property tax appeal service through Attorney partnerships. The goal is to offer a lower-cost option than flat-fee competitors, with a second appeal included if the first appeal is unsuccessful. County results are never guaranteed.
No confusing percentage-of-savings pricing.
Appeals prepared with legal partners as the service launches.
If the first attempt is unsuccessful, we plan to appeal again in the next eligible window.
