Cook County Value property tax analysis

1139 Gunderson Ave, Oak Park, IL 60304

2 bed / 1 bath, 1,253 sqft, built 1922, in Oak Park Appraised at $400,000 for 2026.

Cook County account 16184190400000

Appraised value
$400,000
Tax year 2026
Market value
$400,000
Living area
1,253 sqft
$319 per sqft
Year built
1922
Average

Why this page matters for a protest

A strong tax protest page needs the county value, property facts, and enough context to compare this home with similar properties nearby. This page gives homeowners a starting point before reviewing comparable homes and prior-year changes.

The county value changed +11.5% from $358,620 in 2025 to $400,000 in 2026.