Cook County Value

9807 57th St Countryside, IL 60525

5 bed / 4 bath, 3,000 sqft, built 2001, in Lyons. Assessor market value for 2026: $750,010.

Cook County account 18162080470000

Assessor market value
$750,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,000 sqft
$250 per sqft
Year built
2001
Average quality

Compare this assessment

Start with the county value and property facts, then review appraisal comps, recent sales, and prior-year changes to decide whether the assessment is worth challenging. The comps on this page are free to review; email sign-in is only used to save a printable report.

For nearby context, browse ZIP 60525 and Lyons assessment pages.

Local guide: Lyons Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Lyons, appeals to the Assessor closed . Board of Review dates for Lyons have not been published yet.

Deadline rule: Set by township: file with the Assessor by your township's last file date, and with the Board of Review while your township is open there. Evidence is reviewed by the Cook County Assessor's Office or, in a separate appeal, by the Cook County Board of Review. Dates checked against the official source.

Assessment snapshot

These public CCAO records highlight what may be worth checking before you file.

  • Assessment changeThe assessor market value increased 36.1% from $551,000 in 2025 to $750,010 in 2026.
  • Assessor market value per square footThe current public record shows about $250 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Lyons neighborhood and ZIP 60525.
  • Neighborhood value signalAmong 1,221 residential records in the same neighborhood, the average assessor market value is about $274 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +24.5% on average.

Comparable assessments

Showing 5 of the 8 similar homes in this property's equity comparison, from public appraisal records.

  • 5328 8th Ave Countryside, IL 60525
    3,043 sqft | $276/sqft | built 2013 | Similar size (3,043 vs 3,000 sqft); Similar lot size (9,648 vs 9,750 sqft); Same quality (Average)
    $840,000
  • 5433 S Spring Ave Countryside, IL 60525
    3,084 sqft | $282/sqft | built 2013 | Similar size (3,084 vs 3,000 sqft); Similar lot size (10,050 vs 9,750 sqft); Same quality (Average)
    $870,010
  • 5441 8th Ave Countryside, IL 60525
    3,051 sqft | $177/sqft | built 1991 | Similar size (3,051 vs 3,000 sqft); Similar lot size (9,804 vs 9,750 sqft); Same quality (Average)
    $540,000
  • 9725 W 57th St Countryside, IL 60525
    2,756 sqft | $255/sqft | built 2001 | 8% smaller (2,756 vs 3,000 sqft); Built same year (2001); Similar lot size (9,221 vs 9,750 sqft)
    $702,800
  • 5755 9th Ave Countryside, IL 60525
    2,733 sqft | $271/sqft | built 2001 | 9% smaller (2,733 vs 3,000 sqft); Built same year (2001); Similar lot size (8,989 vs 9,750 sqft)
    $740,000

Recent comparable sales

Sales selected by similarity to the subject property.

Public appraisal comparison for 2026. Prepared . Appraisal source: Cook County Assessor's Office. Sales data checked in this snapshot: . Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 36.1% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$750,010+$199,010+36.1%
2025$551,000$00.0%
2024$551,000−$49,000−8.2%
2023$600,000+$21,590+3.7%
2022$578,410$00.0%
2021$578,410+$200.0%
2020$578,390——
6-year total+$171,620+29.7%