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What is pre-registration?

Pre-registration lets you prepare before your township's appeal window opens—organizing property info, reviewing your assessment, and being ready to file quickly. You typically need your township name, property address, and PIN. It does not file the appeal itself.

Want to know if your assessment is too high? Check your property free →

The full guide: Cook County Property Tax Appeal Deadlines →

Are You Overpaying?

Is your assessment too high? Check your potential savings in under a minute.

ATTORNEYS & CPAs, EVERY VENUE

  • In 2025 our clients were 1.7 times as likely to win a reduction at the Assessor, and 1.3 times as likely at the Board of Review, as clients of attorneys with 100+ decided residential appeals (2.2 times at the Assessor in 2026 so far, as of October 29, 2026).

  • Instant property analysis from county data

  • Licensed Illinois tax attorneys & CPAs

  • Every level: Assessor → Board of Review → PTAB or Circuit Court

How a Cook County property tax appeal works, step by step ->

Source: Cook County Assessor and Board of Review public appeal records. Past results do not guarantee a similar outcome.

About Us

No Upfront Fees

$0 Upfront cost — no fee unless your assessment is reducedOur fee is 25% of first-year savings, only if your assessment is reduced.

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