Cook County Value property tax analysis

1138 Ontario St, Oak Park, IL 60302

4 bed / 2 bath, 2,244 sqft, built 1913, in Oak Park Appraised at $690,000 for 2026.

Cook County account 16071090100000

Appraised value
$690,000
Tax year 2026
Market value
$690,000
Living area
2,244 sqft
$307 per sqft
Year built
1913
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 +38.0% from $500,000 in 2025 to $690,000 in 2026.