Cook County Value

5810 Rosemary Ct Countryside, IL 60525

3 bed / 1 bath, 1,246 sqft, built 1968, in Lyons. Assessor market value for 2026: $390,000.

Cook County account 18162120180000

Assessor market value
$390,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,246 sqft
$313 per sqft
Year built
1968
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 18.2% from $330,000 in 2025 to $390,000 in 2026.
  • Assessor market value per square footThe current public record shows about $313 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.

  • 9738 W 58th St Countryside, IL 60525
    1,248 sqft | $280/sqft | built 1970 | Similar size (1,248 vs 1,246 sqft); Similar age (1970 vs 1968); Lot 17% smaller (7,581 vs 9,175 sqft)
    $350,000
  • 545 8th Ave, La Grange, IL 60525
    1,294 sqft | $355/sqft | built 1962 | Similar size (1,294 vs 1,246 sqft); Similar lot size (8,417 vs 9,175 sqft); Same quality (Average)
    $460,010
  • 5802 Francis Ave Countryside, IL 60525
    1,225 sqft | $318/sqft | built 1968 | Similar size (1,225 vs 1,246 sqft); Built same year (1968); Lot 18% smaller (7,509 vs 9,175 sqft)
    $390,000
  • 9714 Lorraine Dr Countryside, IL 60525
    1,200 sqft | $283/sqft | built 1967 | Similar size (1,200 vs 1,246 sqft); Similar age (1967 vs 1968); Lot 18% smaller (7,540 vs 9,175 sqft)
    $340,000
  • 511 7th Ave, La Grange, IL 60525
    1,281 sqft | $336/sqft | built 1955 | Similar size (1,281 vs 1,246 sqft); Similar lot size (8,413 vs 9,175 sqft); Same quality (Average)
    $430,000

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 18.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$390,000+$60,000+18.2%
2025$330,000$00.0%
2024$330,000$00.0%
2023$330,000+$72,330+28.1%
2022$257,670$00.0%
2021$257,670$00.0%
2020$257,670——
6-year total+$132,330+51.4%