Cook County Value

803 Illinois St Lemont, IL 60439

3 bed / 1 bath, 870 sqft, built 1929, in Lemont. Assessor market value for 2026: $190,010.

Cook County account 22204240070000

Assessor market value
$190,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
870 sqft
$218 per sqft
Year built
1929
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 60439 and Lemont assessment pages.

Local guide: Lemont Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Lemont, appeals to the Assessor closed . Board of Review dates for Lemont 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 stayed about the same, from $190,010 in 2025 to $190,010 in 2026.
  • Assessor market value per square footThe current public record shows about $218 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Lemont neighborhood and ZIP 60439.
  • Neighborhood value signalAmong 1,277 residential records in the same neighborhood, the average assessor market value is about $255 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +25.5% on average.

Comparable assessments

Similar public appraisal records selected for this property's equity comparison.

  • 703 Porter St Lemont, IL 60439
    861 sqft | $325/sqft | built 1922 | Similar size (861 vs 870 sqft); Similar lot size (4,650 vs 4,500 sqft); Same quality (Average)
    $280,000
  • 420 Grant St Lemont, IL 60439
    864 sqft | $255/sqft | built 1924 | Similar size (864 vs 870 sqft); Similar age (1924 vs 1929); Lot 11% larger (5,000 vs 4,500 sqft)
    $220,000
  • 310 Julia St Lemont, IL 60439
    840 sqft | $298/sqft | built 1915 | Similar size (840 vs 870 sqft); Similar lot size (4,650 vs 4,500 sqft); Same quality (Average)
    $250,000
  • 405 State St Lemont, IL 60439
    905 sqft | $309/sqft | built 1921 | Similar size (905 vs 870 sqft); Lot 12% smaller (3,960 vs 4,500 sqft); Same quality (Average)
    $280,000
  • 605 McCarthy Rd Lemont, IL 60439
    980 sqft | $245/sqft | built 1922 | 13% larger (980 vs 870 sqft); Similar lot size (4,432 vs 4,500 sqft); Same quality (Average)
    $240,000

Recent comparable sales

No usable comparable sales are available in this data snapshot.

Public appraisal comparison for 2026. Prepared . Appraisal source: Cook County Assessor's Office. Sales data checked in this snapshot: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

No change in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$190,010$00.0%
2025$190,010$00.0%
2024$190,010$00.0%
2023$190,010+$30,560+19.2%
2022$159,450$00.0%
2021$159,450$00.0%
2020$159,450——
6-year total+$30,560+19.2%