Annual Tax Sale & Scavenger Sale

Cook County Tax Auction Guide 2026

Illinois — Updated for current auction season

Cook County holds both annual tax sales and biennial scavenger sales. The scavenger sale offers properties with 3+ delinquent tax years (per 35 ILCS 200/21-145) at deeply discounted prices — sometimes as low as $250. This guide covers both sale types, the penalty bid system (up to 18% per 6-month period), post-2024 redemption periods (30 months residential 1-6 unit; 12 months for vacant non-farm, 7+ unit residential, and commercial/industrial), regulatory uncertainty from Tyler v. Hennepin, and the tax deed petition process for Cook County.
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📄 Cook County-specific — not generic
🎯 Dates, rules, contacts & step-by-step process
Updated for 2026 auction season
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Table of Contents
  1. What Are Tax Deed Sales?
  2. Cook County Market Overview
  3. Key Dates & Registration
  4. How to Research Properties Before Bidding
  5. The Bidding Process: How It Works
  6. After the Auction: What Happens Next
  7. Redemption Period & Right of Redemption
  8. Clearing Title After Purchase
  9. Key Contacts & Official Resources
Chapter 1 — Introduction
Cook County holds both annual tax sales and biennial scavenger sales. The scavenger sale offers properties with 3+ delinquent tax years (per 35 ILCS 200/21-145) at deeply discounted prices — sometimes as low as $250. This guide covers both sale types, the penalty bid system (up to 18% per 6-month period), post-2024 redemption periods (30 months residential 1-6 unit; 12 months for vacant non-farm, 7+ unit residential, and commercial/industrial), regulatory uncertainty from Tyler v. Hennepin, and the tax deed petition process for Cook County.
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