Cook County Value

40 E Custer St Lemont, IL 60439

6 bed / 2 bath, 2,890 sqft, built 1914, in Lemont. Assessor market value for 2026: $520,010.

Cook County account 22291060150000

Assessor market value
$520,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,890 sqft
$180 per sqft
Year built
1914
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 13.0% from $460,010 in 2025 to $520,010 in 2026.
  • Assessor market value per square footThe current public record shows about $180 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.

  • 415 Fremont St Lemont, IL 60439
    2,800 sqft | $139/sqft | built 1921 | Similar size (2,800 vs 2,890 sqft); Lot 13% larger (11,748 vs 10,420 sqft); Same quality (Average)
    $390,010
  • 809 Warner Ave Lemont, IL 60439
    3,017 sqft | $186/sqft | built 1918 | Similar size (3,017 vs 2,890 sqft); Similar age (1918 vs 1914); Lot 18% smaller (8,520 vs 10,420 sqft)
    $560,000
  • 419 Holmes St Lemont, IL 60439
    2,655 sqft | $196/sqft | built 1924 | 8% smaller (2,655 vs 2,890 sqft); Similar lot size (9,932 vs 10,420 sqft); Same quality (Average)
    $520,010
  • 221 Freehauf St Lemont, IL 60439
    3,026 sqft | $172/sqft | built 1905 | Similar size (3,026 vs 2,890 sqft); Lot 19% smaller (8,400 vs 10,420 sqft); Same quality (Average)
    $520,000
  • 817 State St 1 Lemont, IL 60439
    2,536 sqft | $92/sqft | built 1920 | 12% smaller (2,536 vs 2,890 sqft); Same quality (Average); Same bed/bath (6/2)
    $232,400

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 13.0% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$520,010+$60,000+13.0%
2025$460,010$00.0%
2024$460,010$00.0%
2023$460,010+$210,260+84.2%
2022$249,750$00.0%
2021$249,750$00.0%
2020$249,750——
6-year total+$270,260+108.2%