How to appeal for lack of uniformity in Cook County
A lack-of-uniformity appeal argues that your property is assessed less favorably than genuinely similar properties. The practical question is simple: are credible nearby homes with similar characteristics assessed lower than yours?
Check your property for a lack-of-uniformity signal.
Enter your Cook County address or 14-digit PIN. We will screen for lower-assessed similar properties before you decide whether to file.
Free to check first. No credit card required.
Uniformity is about similar properties receiving similar treatment
Cook County identifies lack of uniformity as a common appeal basis. For a residential comp case, compare homes that are close in class, location, building size, age, construction, and other material characteristics.
Start with physical similarity, then compare assessment
Why assessment per square foot is useful
For residential uniformity analysis, comparing building assessment per square foot can make differences easier to see without letting different land assessments dominate the comparison. It is still only one part of the case: the properties must make sense as comparables.
The lower rate is meaningful only if the comparable is physically and geographically credible.
How many comparables?
The Assessor's current appeal rules require at least three comparables for a comps-based filing and recommend at least five. Simple Tax Appeal screens the public data for a small, coherent evidence set rather than treating every nearby parcel as an appeal comp.
How to evaluate Cook County comparable properties →Official guidance
Let the data screen for a defensible set of lower-assessed similar homes.
Comparable-property analysis is evidence preparation, not a guarantee of an assessment reduction.