See where your assessed value lands against comparable Cook County homes.
Plain math on Cook County's own public records — no signup, no credit card. We show what the public record does and does not support.
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, up to three comparable properties from the Cook County record, and — where the county publishes a market value — your assessment level against its 10% residential target. 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 CCAO neighborhood code for properties of similar size, age, and class, taking the most recent qualifying records first and widening to the township when that cohort is thin. Selection is by cohort and recency — we do not rank comparables by distance.
For class 2 residential property, Cook County targets an assessed value near 10% of market value. Where the county publishes a market value for your property and for a comparable, we show both assessment levels; where it does not, we show the assessed values and say the level is unavailable.
You get the assessed-value comparison, the township's filing window where the county's calendar has been verified, and a plain statement of what this check did and did not establish. No savings projection — we do not forecast a tax bill that has not been issued.
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.
The $69 packet is a preparation service. We prepare it; you review it, sign it, and file it with the county yourself.
Everything you need to file the appeal yourself in your township.
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, and the county opens them on a rolling schedule. Enter your address and we show your township's status as published by the county, with the source and the time we retrieved it. Confirm your filing deadline with the county before you file.
You'll see your full report on the next screen — assessed value against comparable properties, the assessment-level gap, and your township's appeal window status as published by the county. No signup, no credit card. If the evidence appears to support closer review and your window is open, you can order the $69 DIY Appeal Packet. If it does not, we'll tell you that too.
Cook County Assessor public records. Every deadline we show carries the source it came from and the time we retrieved it, and we publish no outcome claims.
Cook County doesn't penalize you for filing — you keep the assessed value on file. The $69 packet is a flat fee for preparing your appeal materials and is paid regardless of what the county decides. OverTaxed IL is not a law firm and does not provide legal or tax advice. We do not guarantee a reduction. County decisions are final, and a change in assessed value does not produce an equal change in a tax bill.
OverTaxed IL is not a law firm and does not provide legal or tax advice. We do not guarantee a reduction. County decisions are final, and a change in assessed value does not produce an equal change in a tax bill. OverTaxed IL analyzes public Cook County records and prepares a defined Assessor-stage appeal packet. You review it, sign it, and file it yourself. OverTaxed IL does not file, sign, prepare, handle, or represent anyone at the Cook County Board of Review. Under the Board's own rules, only a licensed attorney or the taxpayer personally may practise before it. If we ever offer anything at that stage, it would be attorney-led. Do not wait for us — confirm your own deadline with the county.