In Palatine Township, 22,798 Cook County Assessor appeals were analyzed for tax year 2025. 3,733 appeals resulted in a Change, meaning an overall 16.37% success rate. On average, the final assessed value came in about 2.92% lower than proposed across all appeals, with successful cases averaging about 10.97% lower. This township-level breakdown and class trend snapshot was prepared by Cook County Tax Appeals to help property owners understand where reductions were most common.

Palatine Township Cook County Property Tax Appeal Results (2025) | Cook County Tax Appeals

Data overview and key metrics

Data analysis prepared by Cook County Tax Appeals using Palatine Township Assessor appeal outcome data (“Change” vs “No Change”).

Palatine Township appeal results overview

This report summarizes Cook County Assessor appeal outcomes for Palatine Township in tax year 2025, using the outcome field “Change or No Change.” A result of “Change” indicates the assessed value was adjusted, while “No Change” indicates it was not.

Why this matters: township-level results often reveal patterns by property class, and those patterns can help you set realistic expectations about how frequently assessed values are changed and which categories see the most movement. Cook County Tax Appeals regularly reviews these trends so property owners can better understand the Cook County appeal landscape.

Palatine Township's overall appeal success rate

Across 22,798 appeals, 3,733 were successful (marked “Change”). That is a 16.37% success rate.

A simple definition of “successful” for this analysis:

• Successful appeal = “Change”

• Unsuccessful appeal = “No Change”

A result like this usually means many filings do not receive an adjustment, so it is important that an appeal clearly shows why the assessment should change and uses support that matches Cook County requirements and timing. (Cook County Assessor)

Appeal success rate by property class

Success rates were not evenly distributed across class codes. The chart below shows appeal success rate by property class (for classes with at least 50 appeals, plus an “Other” group).

Key takeaways from the class trend chart

• Highest success rate (with meaningful sample size):

  • Class 3-15: 92.6% (n=54)

• Commercial/industrial classes with stronger outcomes than the township average:

  • Class 5-93: 63.0% (n=100)

  • Class 5-17: 48.1% (n=154)

• Largest volume residential sub-classes were below the township average:

  • Class 2-99: 14.8% (n=9,988)

  • Class 2-78: 14.8% (n=3,866)

• Lowest success rate (among higher-volume categories shown):

  • Class 2-41: 2.0% (n=101)

Cook County appeal classes generally align to broad property types (for example, Class 2 residential, Class 3 larger apartments, Class 5 commercial/industrial), with sub-codes used for finer grouping.

Assessed value changes explained

Looking at assessed values across all appeals in Palatine Township:

• Average proposed AV: $52,361

• Average final AV: $50,830

• Average change: -$1,531 per appeal on average (about -2.92%)

For successful appeals only (those marked “Change”), the average reduction was larger:

• Successful cases averaged about -10.97% from proposed to final (about -$9,350 on average)

Why this matters: assessed value is the starting point that drives your tax bill allocation. If your assessed value is too high relative to similar properties, even a modest adjustment can change what you owe. Cook County’s appeal system allows owners to challenge assessed value, classification, or exemptions when the facts support it.

What Cook County property class numbers mean

Cook County assigns every property a class code to group similar property types together for assessment purposes. The first number identifies the broad category, while the numbers after the dash identify a more specific subtype.

Below is a plain language explanation of the key class codes referenced in this analysis.

• Class 2 (Residential Property)

  • Class 2-99: Standard single family residential homes that do not fall into a more specific residential subtype.

  • Class 2-78: Townhomes, row homes, and similar attached residential properties.

  • Class 2-41: Multi-unit residential buildings with two to six units, often smaller rental properties.

• Class 3 (Apartment Buildings)

  • Class 3-15: Larger apartment properties, generally seven units or more, including mid-sized and larger rental buildings.

• Class 5 (Commercial and Industrial Property)

  • Class 5-17: Commercial properties such as office buildings, retail centers, warehouses, and mixed commercial uses.

  • Class 5-93: Specialized commercial or industrial properties, which may include unique-use buildings or properties with limited comparable sales.

Why class codes matter for appeal results

Appeal success rates often vary by class because each category is valued differently and relies on different types of supporting evidence. Residential classes typically involve high volumes of appeals with lower change rates, while certain commercial or apartment classes may see higher success when valuation data or income information supports an adjustment.

Cook County Tax Appeals reviews these class-specific trends to help Cook County property owners better understand how their property type performs during the appeal process and what factors may influence outcomes.

What these results mean for property owners in Palatine Township

• Do not assume an appeal automatically leads to a reduction. In this dataset, roughly 1 in 6 appeals resulted in a change.

• Property class patterns matter. Some categories, especially certain Class 5 sub-classes in this township’s data, saw higher change rates than high-volume residential sub-classes.

• Evidence quality and clarity matter. Cook County guidance emphasizes being specific about what you want changed and presenting the supporting information cleanly.

• Use township trends to set expectations. This is exactly why Cook County Tax Appeals publishes township-by-township breakdowns: it helps you understand where appeals tend to move the needle and where they are tougher.

FAQ: Palatine Township and Cook County property tax appeals

1) What does “Change” mean in Cook County Assessor appeal results?

“Change” means the Assessor appeal outcome resulted in an adjustment to the assessed value in the record used for this analysis.

2) Which properties can appeal in Cook County?

Owners can generally appeal assessment, classification, or exemptions, and Cook County groups appeals by property class (including residential, larger apartments, not-for-profit, and commercial/industrial categories).

3) When is the Palatine Township appeal deadline?

Deadlines vary by agency and year. County Property Tax Appeal Deadlines page..

4) What is the difference between the Assessor and the Board of Review?

The Assessor sets the assessment, while the Board of Review is a separate agency that hears appeals after the Assessor stage and sets the final county valuation for that tax year. (Cook County Board of Review)

5) What are common reasons appeals succeed?

Appeals are more likely to move when property characteristics are incorrect, the value is not supported by the market, or the filing clearly explains what should be changed and why, using organized evidence.

Conclusion

For Palatine Township (tax year 2025), the data shows a 16.37% overall success rate, with meaningful differences by property class code. Average final assessed values came in below proposed values, and successful appeals saw substantially larger reductions on average. Township-level reporting like this, prepared by Cook County Tax Appeals, helps you understand how the local appeal results actually played out and what trends stand out by class.

If you want to understand whether your Palatine Township property looks over assessed, visit Cook County Tax Appeals/ Calculate my savings to check potential savings and learn the next steps. You can register with no upfront costs, and you only pay if you save.