See where your assessed value lands against comparable nearby homes.
Plain math on Cook County's own public records — no signup, no credit card. If you're fairly assessed, we'll tell you.
For class 2 residential property, assessed value is generally targeted at 10% of market value. Appeals also depend on uniformity: whether comparable homes are assessed lower than yours.
Your assessed value, three nearby comps, your assessment level against Cook County's 10% residential target, and the uniformity gap vs. similar homes. Every number is sourced from public CCAO records you can verify yourself.
Cook County publishes every assessment, every comparable, and every appeal outcome. We use that data — the same data the Board of Review uses — to tell you whether your number is out of line.
Your PIN returns your assessed value, market value, square footage, year built, and property class — straight from CCAO records.
We search your neighborhood code for properties of similar size, age, and class — the same logic the Board of Review applies to comparable-sales appeals.
For class 2 residential property, Cook County targets an assessed value near 10% of market value. We separately compare your assessment level with similar nearby homes so the appeal argument is about both statutory level and uniformity.
Gap × your township's effective tax rate × the 3-year triennial window. The arithmetic is shown on your result page — copy it into your appeal verbatim.
We don't publish testimonials or savings averages we haven't verified. Until the first 2026 decisions come back, review the actual deliverable instead: a Cook County-ready appeal packet with comps, assessment-level analysis, filing instructions, and deadline tracking.
Everything you need to file the appeal yourself in your township.
We prepare and submit the appeal — you just sign the authorization.
For larger potential reductions: no upfront service fee, reviewed before acceptance.
Condo boards and HOA managers in Cook County can use the same comparable-property + assessment-level packet, run across every PIN in the association. No legal-representation claim, no per-unit upsell. Drop your email and one OverTaxed IL contact will reply within 2 business days with the next-step plan.
Each Cook County township has its own appeal window. The county runs on a rolling 3-year triennial cycle, and only about a third of townships are open at any given time. Once you enter your address, we show your specific township's window and exact close date. The 2026 triennial covers the South and West Suburbs first; North Suburbs and the City of Chicago follow in 2027 and 2028.
You'll see your full report on the next screen — assessed value vs. comparable properties, assessment-level gap, estimated annual and 3-year overpayment, and your township's appeal window status. No signup, no credit card. If your check shows over-assessment, you can pick the DIY Appeal Packet ($69), Done-For-You ($97), or request contingency review for larger cases. If your numbers don't suggest an appeal, we'll tell you that too.
Cook County Assessor and Board of Review public records. We check township schedules regularly and avoid publishing outcome claims until they are verified. It's the same public-record base the Board of Review uses to decide appeals.
Cook County doesn't penalize you for filing — you keep the assessed value on file. The $69 DIY packet is a flat service fee for preparing your appeal materials and is paid regardless of outcome. A refund applies only if an OverTaxed IL procedural error causes the county to reject the filing.
Most homeowners pick the $69 DIY Appeal Packet when they want us to build the comp package and they are comfortable filing it themselves. Done-For-You at $97 is for homeowners who want us to submit after they sign explicit filing authorization.
No. OverTaxed IL is not a law firm and does not provide legal advice. We help you organize public records into the format the Board of Review accepts.