In 2025, North Chicago Township recorded 23,738 Cook County Assessor appeals, with 2,419 marked “Change”, resulting in a 10.19% success rate. The average Final Assessed Value was about 4.9% lower than the average Proposed Assessed Value, showing measurable reductions when appeals succeeded. Success rates varied significantly by property class, meaning outcomes depended heavily on classification and supporting evidence. Property owners reviewing their assessment should pay close attention to assessed value accuracy, classification codes, and comparable properties. Analysis prepared by Cook County Tax Appeals.

You can also track township-specific deadlines on our Cook County Property Tax Appeal Deadlines page..

North Chicago Township, Cook County Property Tax Appeal Results (2025) | Expert Analysis

Data overview and key metrics

 Township-level appeal analysis prepared by Cook County Tax Appeals.

North Chicago Township appeal results overview

This report summarizes the 2025 Cook County Assessor appeal outcomes for North Chicago Township. Each appeal record includes a property class, proposed assessed value, final assessed value, and an outcome indicator. Appeals marked “Change” reflect a successful reduction in assessed value and are treated as successful in this analysis.

Cook County property tax appeals follow a structured process tied to reassessment notices and township-specific filing windows. Understanding how assessments are reviewed at the township level helps property owners evaluate whether their assessed value aligns with neighborhood standards. Cook County Tax Appeals regularly analyzes township appeal data to help property owners interpret these results accurately.

Overall appeal success rate

North Chicago Township posted an overall appeal success rate of 10.19% for the 2025 tax year.

A successful appeal means the Assessor issued a change to the assessed value. Appeals resulting in no adjustment were classified as unsuccessful.

This outcome shows that most appeals do not automatically lead to reductions. Appeals that succeed typically present clear valuation support, accurate property data, and strong comparables. Careful review of an assessment before filing can materially improve the chances of a favorable outcome.

Appeal success rate by property class

Appeal outcomes varied widely by property class, underscoring the importance of classification in Cook County valuation.

Key observations:

• High-volume classes, particularly Class 2-99, recorded lower-than-average success rates, which weighed down the township-wide average.

• Several lower-volume classes showed meaningfully higher success rates, suggesting stronger alignment between appeal evidence and valuation methodology.

• Property owners should evaluate success trends within their specific class rather than relying solely on township-wide averages.

Cook County Tax Appeals tracks class-level appeal outcomes to help property owners benchmark expectations using real township data.

Assessed value changes explained

Across all appeals filed:

• Average proposed assessed value: 141,294

• Average final assessed value: 134,384

This represents an average reduction of approximately 4.9%.

Additional insight from successful appeals:

• Total assessed value reduction: 164,000,126

• Average reduction per successful appeal: 67,797

• Median reduction per successful appeal: 7,500

The gap between average and median reductions indicates that a smaller number of large reductions significantly influenced the overall average, while many successful appeals achieved more modest adjustments.

What these results mean for property owners

For North Chicago Township property owners, the 2025 data highlights several practical takeaways:

• Appeal outcomes depend heavily on property classification and valuation approach

• Strong evidence and accurate property data materially affect success rates

• Township-level trends provide useful benchmarks for setting realistic expectations

• Reviewing an assessment early improves decision-making before deadlines close

Understanding how your property compares within its class can clarify whether an appeal is likely to produce a meaningful reduction.

FAQ

What does “Change” mean in Cook County appeal results?
“Change” indicates the Assessor adjusted the property’s assessed value following review.

Why do appeal success rates differ by property class?
Different classes use different valuation methods, evidence standards, and comparable properties, which affects outcomes.

Does a low township success rate mean I should not appeal?
No. Township averages include many weak or unsupported appeals. Well-prepared appeals can still succeed.

What typically improves appeal outcomes?
Accurate property data, correct classification, strong comparables, and clear valuation support.

How should property owners use township appeal data?
Township data helps set expectations and identify whether properties in similar classes are achieving reductions.

Conclusion

North Chicago Township’s 2025 Cook County appeal data shows a 10.19% success rate, with outcomes varying significantly by property class. While most appeals did not result in changes, successful appeals produced meaningful assessed value reductions. Property owners who understand classification rules, valuation drivers, and township trends are better positioned to evaluate whether an appeal is worthwhile.

Review your assessed value, confirm your property classification, and understand how similar properties performed in North Chicago Township. Cook County Tax Appeals provides township-level insights to help property owners evaluate potential property tax savings with no upfront costs and payment only if savings are achieved.