Lake Township property tax appeal, Cook County
The median residential assessment in Lake Township rose 25.0% at its 2024 reassessment, and of the appeals decided for tax year 2025, 13.2% of 4,042 at the Assessor changed the value and 49.6% of 15,341 at the Board of Review ended in a decrease. Appeals for tax year 2026 close 29 Oct 2026 at the Cook County Assessor — verified 25 Sep 2026.
When Lake Township can appeal
| Where you appeal | Opens | Closes | Date we verified it |
|---|---|---|---|
| Cook County Assessor | 16 Sep 2026 | 29 Oct 2026 | 25 Sep 2026 |
From the Assessor’s and Board of Review’s published 2026 calendars. Dates can change; confirm with the office before filing.
Lake 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 | 3,237 | 14.7% | 9,349 | 37.6% |
| 2024 | 13,058 | 23.7% | 16,715 | 54.8% |
| 2025 | 4,042 | 13.2% | 15,341 | 49.6% |
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.
Lake Township assessment increase, year on year
| Assessment year | Homes assessed in both years | Median change |
|---|---|---|
| 2024 | 150,298 | +25.0% |
| 2025 | 150,307 | +0.0% |
Assessor mailed values for class 2 properties in Lake Township, compared with the same property’s value the year before. Cook County reassesses one of its three regions (City 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. 150,408 residential parcels are in the township today.
Lake Township appeals: common questions
When is the Lake Township appeal deadline?
For tax year 2026, the Cook County Assessor window for Lake Township opened 16 Sep 2026 and closes 29 Oct 2026. We last verified that date against the office’s published calendar on 25 Sep 2026; dates move, so confirm with the office before you file.
What are the odds an appeal in Lake Township works?
In tax year 2025, 13.2% of the 4,042 closed residential appeals the Assessor decided for Lake Township changed the assessed value, and 49.6% of the 15,341 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 Lake Township?
They are separate filings and the table above shows both. For 2025, Lake Township sent 4,042 residential appeals to the Assessor and 15,341 to the Board of Review; 13.2% and 49.6% 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 Lake Township?
At the 2024 reassessment the median residential assessment rose 25.0%, measured across the 150,298 class-2 properties the Assessor valued in both 2023 and 2024. That is the middle of the township, not your property: half the homes moved more.
What if the Lake 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