Open Now · Cook County Board of Review · Deadline: November 6, 2026
Northfield Township 2026 Property Tax Appeal Evidence Packet
Northfield Township homeowners in Northbrook, Glenview, and Northfield can file their 2026 property tax appeal with the Cook County Board of Review through November 6, 2026, with supporting uniformity and sales evidence due by November 16, 2026.
Filing Agency Cook County Board of Review
Appeal Filing Deadline November 6, 2026
Supporting Evidence Due November 16, 2026
Assessor Township Code Code 25 (North Suburbs)
Communities & Neighborhoods Covered in Northfield Township
How Northfield Township Homeowners Win Assessment Reductions
When reviewing a residential appeal in Northfield Township, analysts at the Cook County Board of Review evaluate two primary statutory grounds:
- Lack of Uniformity: Comparing your home's Building Assessed Value per square foot ($/sq ft) against 3 to 6 similar properties in the exact same Assessor Neighborhood Code and Property Class (e.g., Class 2-03 one-story, Class 2-04 larger one-story, Class 2-05/2-06/2-07 two-story, Class 2-11 two-to-six flat, or Class 2-95 townhome).
- Overvaluation (Recent Comparable Sales): Demonstrating that recent arm's-length residential sales in your neighborhood support a lower fair market value than the Assessor's implied valuation.
With Northfield Township's typical composite tax rate of approximately 7.45% and the Cook County state equalization factor of 3.0355, every $5,000 reduction in Assessed Value lowers your annual property tax bill by roughly $1,131/year.