Now live: LeydenLeyden: this year's window has closed

Leyden homeowners: see if your assessment is too high.

Type your address and see, for free, if your home is assessed higher than the homes around it. Every number comes from Cook County’s own records.

Covers Franklin Park, Melrose Park, Northlake, Schiller Park, River Grove, Rosemont, Elmwood Park. Free to check. Free to file.

The 2026 dates for Leyden

Cook County sets one window per township. Miss it and you wait a year.

Assessor opened
August 31, 2026
Assessor: file by
October 14, 2026
Evidence due
With filing

Source: Cook County Assessor Assessment & Appeal Calendar (updated 2026-10-02), read 2026-10-04: last file date 2026-10-14; Board of Review dates not yet published.

Leyden so far

27,824

homes loaded and checked

Launch price

$50flat for the full filing-ready packet, one time.

The Leyden streets where the most homes are assessed above similar homes

Share of homes on each street that our free check flags for 2026, streets with 150 or more homes. Is yours one of them?

  • Elder Ln45%of 336 homes
  • Hawthorne St45%of 239 homes
  • N 78th Ct45%of 192 homes
  • W Sunset Dr43%of 155 homes
  • Ernst St42%of 219 homes
  • Lincoln St42%of 205 homes
  • N 77th Ct41%of 344 homes
  • George St40%of 225 homes

How to appeal in Leyden, step by step

  1. Step 1

    Type your address

    We find your home in the county's records. No account, no card.

  2. Step 2

    See if you have a case

    We compare your assessment with similar homes nearby. If it's fair, we say so.

  3. Step 3

    Get your packet

    Comparable homes, the numbers, a filing checklist. One flat price, shown first.

  4. Step 4

    File in your window

    On the county's website. Free. We'll show the date when the county publishes it.

  • No lawyer needed
  • You keep every dollar you save
  • Every number from Cook County records

Leyden appeal questions

The short answers. If yours isn’t here, email us and a person replies the same day.

When is the Leyden property tax appeal deadline?

This year's Leyden window has closed. Watch your address and we'll email you before next year's opens.

Do I need a lawyer to appeal?

No. Homeowners appealing their own home can file themselves, for free, on the county's website, and it's easy: every Morganwell report includes a step-by-step filing guide. Morganwell is not a law firm; we build the evidence and guide you, and you file it in your own name.

What does it cost?

The check is free. While we launch Leyden, every full packet is $50 flat, one time. Never a share of your savings. Filing with the county is free. No outcome is guaranteed.

What's the difference between Morganwell and filing with the county?

Filing is the county's process and it's free. Morganwell is the evidence: we read the county's own records and show whether comparable homes are assessed lower than yours, in the form the county asks for, plus a step-by-step guide so filing it yourself is easy.

Ten seconds to check.

Ten seconds to check. Five minutes to file. Then you wait for the letter.