Cook County Class C Brownfield Property Tax Incentive
Class C rewards owners who clean up contaminated industrial or commercial property. After receiving an IEPA No Further Remediation letter, the property gets 12 years of reduced assessment on both land and improvements.
Check an Address — Free Snapshot
Compare the geocoded point for a Chicago address with the boundary used to screen Cook County Class C Brownfield Property Tax Incentive. A match is a location signal; review the current program source for the boundary's role and remaining criteria.
Published criteria — confirm with Cook County Assessor's Office — Incentives
- Industrial or commercial property in Cook County
- Industrial or commercial use post-remediation
- Remediation costs ≥$100K or ≥25% of market value
Cook County Class C Brownfield Property Tax Incentive is administered at the county level. Depending on the program, eligibility may depend on the specific location, property type, or business activity rather than a single drawn boundary.
Boundaries are precise and change over time, so whether a specific address falls inside a mapped zone always depends on that exact address. The fastest way to check is to run a free snapshot for the parcel you have in mind — mapped coverage is a location signal, not an eligibility determination.
Range on file · 10% assessment on land + improvements for 10 years
Current published terms as of 2026-08-09
- +10% assessment of market value for years 1-10
- +15% year 11, 20% year 12
- +Applies to BOTH land and improvements (unlike most other classes)
- +Typical savings >$200K over 10 years on a $1M industrial property
- 1Complete remediation under IEPA Site Remediation Program
- 2Obtain the No Further Remediation (NFR) letter from IEPA
- 3Obtain municipal resolution of support
- 4File Class C application with the Assessor within one year of the NFR letter
Confirm IEPA NFR letter is in hand, then call (312) 603-7529
- IEPA No Further Remediation letter
- Remediation cost documentation (≥$100K or ≥25% of MV)
- Engineering and legal cost invoices
- Municipal resolution
- Use plan for the remediated site
This page is a starting point, not eligibility, legal, or tax advice. Verify current requirements, deadlines, and boundaries with the administering agency before applying or spending money — program rules and funding change over time.
- IEPA No Further Remediation letter — Illinois EPA
- Municipal resolution of support — Host municipality
- Phone
- (312) 603-7529
- Web
- Visit site ↗
Last verified 2026-08-09
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