Thornton Township property tax appeal, Cook County
No reassessment of Thornton Township clears our sample floor in the records we hold, so the one thing this page can tell you is how appeals ended: for tax year 2025, 12.0% of 4,038 Assessor appeals changed the value and 42.4% of 7,498 Board of Review appeals ended in a decrease. No filing window for tax year 2026 is published here: it wasn’t in the Assessor’s calendar when we last checked.
This page carries 1 of the three kinds of computed figure we need before we ask a search engine to rank a township page (appeal-outcomes). Until the missing ones load it stays out of our sitemap and tells search engines not to index it. Everything printed below is still measured and sourced.
When Thornton Township can appeal
No 2026 appeal dates are shown for this township: they weren’t published in the Assessor’s calendar when we last checked it. Check the Cook County Assessor’s calendar for the current window.
Thornton Township Board of Review and Assessor appeal results by year
| Tax year | Closed Assessor appeals | Share that changed the value | Board of Review appeals | Share decreased |
|---|---|---|---|---|
| 2023 | 6,801 | 17.5% | 8,034 | 50.3% |
| 2024 | 6,504 | 19.7% | 7,816 | 43.1% |
| 2025 | 4,038 | 12.0% | 7,498 | 42.4% |
Residential property classes (class 2, including condominium units). An Assessor appeal counts as changed when the Assessor’s record says the value changed; a Board of Review appeal counts as decreased when its result is “Decrease”. Shares aren’t printed from fewer than 30 appeals. Past outcomes don’t predict the result of any one appeal.
Thornton Township assessment increase, year on year
| Assessment year | Homes assessed in both years | Median change |
|---|---|---|
| 2024 | 59,575 | +0.0% |
| 2025 | 59,459 | +0.0% |
Assessor mailed values for class 2 properties in Thornton Township, compared with the same property’s value the year before. Cook County reassesses one of its three regions (South for this township) each year; in other years the median change is usually 0%. The latest year can be partial while notices are still being mailed. 59,036 residential parcels are in the township today.
Thornton Township appeals: common questions
When is the Thornton Township appeal deadline?
We don’t publish one. Thornton Township’s dates weren’t in the Assessor’s 2026 calendar when we last checked it, and we won’t print a deadline we haven’t verified. The Assessor’s own calendar, linked above, carries the current window.
What are the odds an appeal in Thornton Township works?
In tax year 2025, 12.0% of the 4,038 closed residential appeals the Assessor decided for Thornton Township changed the assessed value, and 42.4% of the 7,498 residential appeals the Board of Review decided ended in a decrease. Those are township-wide rates from closed cases, not a prediction for any one property.
Should I appeal to the Assessor or the Board of Review in Thornton Township?
They are separate filings and the table above shows both. For 2025, Thornton Township sent 4,038 residential appeals to the Assessor and 7,498 to the Board of Review; 12.0% and 42.4% of them respectively moved the value. The Board of Review hears appeals after the Assessor has closed a township, so missing the first window does not end the year.
How much did assessments go up in Thornton Township?
We can’t say yet. No reassessment year for Thornton Township clears our floor of 1,000 homes valued in two consecutive years in the records we hold, so the median change table above is the whole of what we can support.
What if the Thornton Township window has already closed?
Nothing on this page files an appeal for you, and a closed window can’t be reopened here. The figures above are per tax year, so the same tables tell you what the next year’s filing looks like; the free assessment check compares your home with near-identical homes nearby whenever you run it.
Every answer here restates a figure printed elsewhere on this page. Nothing is added that we haven’t measured and sourced.
- Your own property: use the free assessment check, which compares your home with near-identical homes nearby.
- Tax bills, tax rates and exemptions.
- Commercial property and appeals filed with the Property Tax Appeal Board.
- Legal advice. CivicDelta doesn’t file appeals.
More: how a Cook County assessment appeal works · all 38 Cook County townships compared · everything we hold on property · how we compute these figures