Open Now · Cook County Assessor · Deadline: November 12, 2026
Jefferson Township 2026 Property Tax Appeal Evidence Packet
Jefferson Township is the largest residential township on the Northwest Side of Chicago and is open right now at the Cook County Assessor through November 12, 2026. Bungalows (Class 2-03) and two-flats (Class 2-11) on the exact same block often carry building assessments ranging from $11.50/sq ft to $18.50/sq ft.
Filing Agency Cook County Assessor
Appeal Filing Deadline November 12, 2026
Supporting Evidence Due November 12, 2026
Assessor Township Code Code 71 (City of Chicago)
Communities & Neighborhoods Covered in Jefferson Township
How Jefferson Township Homeowners Win Assessment Reductions
When reviewing a residential appeal in Jefferson Township, analysts at the Cook County Assessor evaluate two primary statutory grounds:
- Lack of Uniformity: Comparing your home's Building Assessed Value per square foot ($/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 Jefferson Township's typical composite tax rate of approximately 6.69% 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 $1,015/year.