Cook County Value

1000 E Illinois St Lemont, IL 60439

4 bed / 2 bath, 1,950 sqft, built 1871, in Lemont. Assessor market value for 2026: $390,010.

Cook County account 22204340090000

Assessor market value
$390,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,950 sqft
$200 per sqft
Year built
1871
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 increased 21.9% from $320,010 in 2025 to $390,010 in 2026.
  • Assessor market value per square footThe current public record shows about $200 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

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

  • 701 Warner Ave Lemont, IL 60439
    2,088 sqft | $220/sqft | built 1878 | 7% larger (2,088 vs 1,950 sqft); Similar lot size (8,122 vs 7,484 sqft); Same quality (Average)
    $460,000
  • 923 Singer Ave Lemont, IL 60439
    2,025 sqft | $198/sqft | built 1885 | Similar size (2,025 vs 1,950 sqft); Lot 11% smaller (6,660 vs 7,484 sqft); Same quality (Average)
    $400,010
  • 507 Warner Ave Lemont, IL 60439
    1,912 sqft | $204/sqft | built 1886 | Similar size (1,912 vs 1,950 sqft); Lot 14% larger (8,497 vs 7,484 sqft); Same quality (Average)
    $390,000
  • 613 Walnut Cir Lemont, IL 60439
    1,871 sqft | $192/sqft | built 1879 | Similar size (1,871 vs 1,950 sqft); Lot 18% larger (8,842 vs 7,484 sqft); Same quality (Average)
    $360,000
  • 705 Warner Ave Lemont, IL 60439
    1,779 sqft | $236/sqft | built 1878 | 9% smaller (1,779 vs 1,950 sqft); Similar lot size (8,122 vs 7,484 sqft); Same quality (Average)
    $420,000

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: . Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 21.9% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$390,010+$70,000+21.9%
2025$320,010$00.0%
2024$320,010$00.0%
2023$320,010+$129,880+68.3%
2022$190,130$00.0%
2021$190,130+$100.0%
2020$190,120——
6-year total+$199,890+105.1%