Forest Park homeowners face assessed property values up as much as 24% higher than three years ago, with an Oct. 27 deadline to file a free appeal.

The Cook County Assessor's Office mailed reassessment notices to Forest Park residents on Sept. 14 as part of the triennial cycle covering south and west suburban Cook County, the Forest Park Review reported. Higher assessed values mean higher property tax bills unless the tax rate drops to offset them.

Condo assessments saw the steepest percentage increase. The median assessed value for 197 condos in the Forest Park assessment area climbed to $125,000, up from $101,000 in 2023, a roughly 24% jump. The median condo sale price in 2025 was $145,000, compared to $104,000 in 2023.

For more than 1,200 single-family homes in a subsection of Proviso Township that includes most of Forest Park, the median assessed value rose to $334,000 from $296,000 in 2023. The median sale price for a single-family home in the area reached $350,000 in 2025, up from $315,000 during the prior assessment period.

Multi-family properties also climbed. The median assessed value for 341 multi-family homes hit $416,000, up from $350,000 in 2023. The median multi-family sale price in 2025 was $405,000, compared to $365,000 in the prior cycle.

Forest Park sits in Proviso Township, which also includes Maywood, Bellwood, Melrose Park, Broadview, Brookfield, Berkeley and Westchester. Township-wide, single-family assessments rose 19%, multi-family assessments rose 22% and condo assessments rose 23% from the last cycle, according to Cook County Assessor data reported by the Forest Park Review.

Homeowners who believe their assessment is inaccurate can file a free appeal with the Cook County Board of Review by Tuesday, Oct. 27. Appeals can be submitted online at the Board of Review portal or in person at 118 N. Clark St. in Chicago, Monday through Friday, 9 a.m. to 5 p.m.

In the 2023 Proviso Township reassessment, 10,317 residential appeals were filed, according to Cook County Tax Appeal, a law firm specializing in assessment appeals. About 22.9% of those won a reduction, averaging roughly $2,843 off the assessed value.