Dear Assessor

Check your property tax assessment for free. Appeal it yourself if it's too high.

See in two minutes whether your Cook County home looks over-assessed, using public data and the county's own appeal process.

Filing windows open today (14)

If your home is in one of these townships, you can file an appeal until the date shown.

  • Leyden · Assessorcloses Oct 14, 2026 · 4 days left
  • Worth · Assessorcloses Oct 15, 2026 · 5 days left
  • Wheeling · Assessorcloses Oct 22, 2026 · 12 days left
  • Proviso · Assessorcloses Oct 27, 2026 · 17 days left
  • Lake · Assessorcloses Oct 29, 2026 · 19 days left
  • Palatine · Assessorcloses Nov 4, 2026 · 25 days left
  • Lyons · Board of Reviewcloses Nov 6, 2026 · 27 days left
  • Northfield · Board of Reviewcloses Nov 6, 2026 · 27 days left
  • Orland · Assessorcloses Nov 6, 2026 · 27 days left
  • Stickney · Board of Reviewcloses Nov 6, 2026 · 27 days left
  • West Chicago · Board of Reviewcloses Nov 6, 2026 · 27 days left
  • Jefferson · Assessorcloses Nov 12, 2026 · 33 days left
  • Schaumburg · Assessorcloses Nov 19, 2026 · 40 days left
  • Thornton · Assessorcloses Nov 23, 2026 · 44 days left

Dates come from the county's published calendars (Assessor, Board of Review). Always confirm on the county's site before you file.

How it works

  1. Step 1: Find your home

    Enter your address or 14-digit PIN. In about a minute you get a free check: your home's details, the Assessor's value, comparable homes, a plain verdict, an estimated saving and how similar appeals did in the past.

  2. Step 2: Decide for yourself

    If your home looks over-assessed and your township's filing window is open, you pick the comparable homes and type the value you want to ask for. Not ready yet? Join the free watch list and we'll email you before the deadline.

  3. Step 3: File it yourself

    For a flat $49, one time, you get an evidence packet PDF and a step-by-step walkthrough of the county's own filing site, with your numbers ready to copy. No subscription and no success fee. You submit the appeal yourself; we never file for you.

Dear Assessor is not a law firm, attorney, property tax consultant or agent. We do not file, sign or appear for you. This is not a substitute for the advice of an attorney.