In Northfield Township, we analyzed 21,565 Cook County Assessor appeal outcomes for 2025. 21.3% of appeals were successful, meaning the outcome showed a Change instead of No Change. The average proposed assessed value across all appeals was $102,265, while the average final assessed value was $99,794, a decrease of about $2,472 (2.4%). Appeal success varied widely by property class, showing that results depend heavily on property type and assessment details. This analysis was prepared by Cook County Tax appeals to help property owners understand local appeal trends.

Northfield Township Cook County Property Tax Appeal Results (2025): Success Rate by Property Class

Data Overview and Key Metrics

Data analysis prepared by Cook County Tax Appeals based on Cook County Assessor appeal outcomes.

Northfield Township Appeal Results Overview

This analysis reviews Cook County Assessor appeal outcomes for properties located in Northfield Township. Each appeal record includes the property class, the proposed assessed value, the final assessed value, and whether the appeal resulted in a Change or No Change.

Overall, the data shows that roughly one out of every five appeals led to a change. While many appeals do not result in adjustments, a meaningful portion do, especially when assessments are carefully reviewed and supported. Township level results like these help property owners understand how assessments are being handled locally.

Cook County Tax appeals regularly analyzes Cook County appeal data to provide clear, township-specific insights for property owners.

Northfield Township Overall Appeal Success Rate Explained

Northfield Township appeal success rate: 21.3%.

For this report, a successful appeal is defined as any appeal marked Change. A Change generally means the Assessor adjusted the assessed value or corrected property details that affect valuation.

This success rate shows that appeals are not guaranteed, but they can be effective. Reviewing your assessment for accuracy and understanding how your property compares within the township can make a difference.

Appeal Success Rate by Property Class

Appeal outcomes vary significantly depending on property class. The chart above shows the appeal success rate by property class in Northfield Township. To keep the chart clear, property classes with very small sample sizes are grouped together.

Key observations

• Certain commercial and specialty property classes posted the highest success rates.

• Among high-volume residential categories:

  • Class 2-99 (Residential condominiums): 22.8% success

  • Class 2-78: 17.6% success

  • Class 2-04: 23.6% success

  • Class 2-95: 8.4% success

These differences highlight why property class matters when evaluating appeal potential. Cook County Tax appeals monitors these patterns across Cook County to help property owners understand how their property type performs year to year.

Common Cook County Property Class Codes Explained

Cook County uses class codes to categorize properties based on type and physical characteristics. Some of the most common classes seen in Northfield Township include:

• 2-03: One-story residential homes within a defined size range

• 2-04: Larger one-story residential homes

• 2-78: Multi-story residential properties

• 2-95: Townhomes or row houses

• 2-99: Residential condominiums

• 5-17: One-story commercial buildings

Knowing your property’s class code helps explain why appeal results may differ even among nearby properties.

Assessed Value Changes Explained

Across all Northfield Township appeals in this dataset:

• Average proposed assessed value: $102,265

• Average final assessed value: $99,794

• Average reduction: $2,472 or about 2.4%

It is important to note that appeals marked No Change end with the same assessed value they started with. The overall reduction is driven entirely by successful appeals. Among appeals that did receive a Change, the average assessed value reduction was approximately $11,604, or about 9.3%.

Because assessed value is a key factor in determining property taxes, even modest reductions can translate into meaningful tax savings.

What These Results Mean for Property Owners

• Appeals can work, but outcomes vary by property type and evidence quality.

• Your property class plays a significant role in appeal success rates.

• Many assessments remain unchanged, making review and documentation critical.

• Township-level data provides valuable context when deciding whether to appeal.

Cook County Tax appeals uses data driven analysis like this to help property owners understand assessment trends and evaluate their options with confidence.

Frequently Asked Questions

How long do property owners have to file a Cook County appeal?

Appeal deadlines vary by township and reassessment schedule. The exact deadline is listed on the reassessment notice issued for each property.

What does a Change mean in appeal results?

A Change means the Assessor adjusted the assessment. For this analysis, any appeal marked Change is considered successful.

Can condo owners in Northfield Township appeal their assessments?

Yes. Condominium properties represent a large share of appeals in Northfield Township and show consistent success rates.

Is the Assessor's appeal the final step?

Not always. Depending on timing and circumstances, property owners may have additional appeal options after the Assessor phase.

Conclusion

Northfield Township’s 2025 appeal results show an overall success rate of 21.3%, with clear differences across property classes. While not every appeal leads to a change, successful cases experienced meaningful assessed value reductions. Understanding local appeal trends, property classification, and assessment behavior can help owners make more informed decisions. Cook County Tax appeals provides township-level insights like these to support Cook County property owners.

If you own property in Cook County and want to know whether your assessment may be too high, visit Cook County Tax Appeals to see how much you could potentially save. There are no upfront costs, and property owners only pay if they save.