Thornton Township 2025 Assessment Notices Mailed
The Cook County Assessor’s office mailed 2025 property assessment notices on October 01, 2025. to Thornton Township property owners. The 44-day window to appeal your 2025 assessed value is now open until the deadline of November 14, 2025. The following cities, towns, and villages are in Thornton Township: Blue Island (southern edge), Burnham, Calumet City, Dixmoor, Dolton, East Hazel Crest, Glenwood (northern 1/4), Harvey, Hazel Crest, Homewood (northeast half), Lansing (northern half), Markham (eastern 1/4), Phoenix, Posen, Riverdale, South Holland, and Thornton.
We recommend homeowners review their assessments annually and appeal whenever a strong evidence-based argument is that your property may not be assessed fairly. Thornton Township’s next triennial reassessment is scheduled for 2026. However, if you feel that your assessment is unfair, there is no need to wait; property owners have the right to appeal yearly at the Assessor’s office and the Board of Review. If you’d like a professional opinion on your home’s assessed value as it compares to similar properties in your neighborhood, contact us for a free, no-obligation review and analysis of your home.



Attention Cook County homeowners! The Board of Review has opened the 2024 property tax appeal window for Group 6. If you live in Rich, Schaumburg, or Thornton Township, now is the time to act!
On Friday, September 06th, 2024, the Cook County Assessor’s office mailed 2024 property assessment notices to Thornton Township property owners. The window for appealing your 2024 assessed value is now open and will remain so until the deadline of October 21, 2024.
The Cook County Board of Review has opened 2023 property tax appeals for the fourth group. The
2023 Triennial reassessment notices were mailed to Thornton Township homeowners on Friday, August 04, 2023. Homeowners in Thornton Township have 30 days to appeal their assessment at the Assessor’s office (there will be a second opportunity to appeal later in the year at the Board of Review, whether you appeal at the Assessor’s office or not). The deadline for appealing at the Assessor’s office is September 05, 2023.
The Cook County Board of Review has opened 2022 property tax appeals for the fifth group. The
The Cook County Assessor’s office mailed 2022 property assessment notices on August 17th to Thornton Township property owners. The 33-day window to appeal your 2022 assessed value is now open until the deadline of September 19th. The following cities, towns, and villages are in Thornton Township: Blue Island (southern edge), Burnham, Calumet City, Dixmoor, Dolton, East Hazel Crest, Glenwood (northern 1/4), Harvey, Hazel Crest, Homewood (northeast half), Lansing (northern half), Markham (eastern 1/4), Phoenix, Posen, Riverdale, South Holland, and Thornton.
The Cook County Board of Review has opened 2021 property tax appeals for the fifth group. The
The Assessor’s Office has mailed 2021 assessment notices to Thornton property owners. You may appeal your assessment each year during the 30-day window which is now open and will close on September 09th. The following cities, towns, and villages are in Thornton Township: Blue Island (southern edge), Burnham, Calumet City, Dixmoor, Dolton, East Hazel Crest, Glenwood (northern 1/4), Harvey, Hazel Crest, Homewood (northeast half), Lansing (northern half), Markham (eastern 1/4), Phoenix, Posen, Riverdale, South Holland, and Thornton.
The Cook County Board of Review has opened 2020 property tax appeals for the eighth group of townships. The
Over 90% Success Rate on Property Tax Appeals & Protests
No Up-Front Fees