Cook County Value

12082 Oak Tree Ln Lemont, IL 60439

4 bed / 2 bath, 2,873 sqft, built 1998, in Lemont. Assessor market value for 2026: $780,000.

Cook County account 22272040050000

Assessor market value
$780,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,873 sqft
$271 per sqft
Year built
1998
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 $640,000 in 2025 to $780,000 in 2026.
  • Assessor market value per square footThe current public record shows about $271 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 380 residential records in the same neighborhood, the average assessor market value is about $246 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +25.8% on average.

Comparable assessments

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

  • 12031 Holly Ct Lemont, IL 60439
    2,807 sqft | $235/sqft | built 1996 | Similar size (2,807 vs 2,873 sqft); Similar age (1996 vs 1998); Similar lot size (15,000 vs 15,000 sqft)
    $660,000
  • 12043 Oak Tree Ln Lemont, IL 60439
    3,026 sqft | $258/sqft | built 1999 | 5% larger (3,026 vs 2,873 sqft); Similar age (1999 vs 1998); Similar lot size (15,000 vs 15,000 sqft)
    $780,000
  • 13733 Oak Tree Ln Lemont, IL 60439
    2,840 sqft | $264/sqft | built 2000 | Similar size (2,840 vs 2,873 sqft); Similar age (2000 vs 1998); Similar lot size (14,355 vs 15,000 sqft)
    $750,000
  • 12098 Oak Tree Ln Lemont, IL 60439
    2,697 sqft | $260/sqft | built 1998 | 6% smaller (2,697 vs 2,873 sqft); Built same year (1998); Similar lot size (15,000 vs 15,000 sqft)
    $700,000
  • 13582 Cambridge Dr Lemont, IL 60439
    2,778 sqft | $274/sqft | built 2001 | Similar size (2,778 vs 2,873 sqft); Similar age (2001 vs 1998); Similar lot size (14,826 vs 15,000 sqft)
    $760,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 11 Cedar Ct Lemont, IL 60439
    2,722 sqft | $253/sqft | built 1990 | 5% size difference (2,722 sqft); Moderate age difference (8 years older); Same beds (4)
    $690,000
  • 1238 Acorn St Lemont, IL 60439
    2,802 sqft | $223/sqft | built 1990 | Similar size (2,802 sqft); Moderate age difference (8 years older); Within 1 bedroom (3 vs 4)
    $625,000
  • 1217 Woburn Dr Lemont, IL 60439
    2,576 sqft | $318/sqft | built 2016 | 10% size difference (2,576 sqft); Same beds (4)
    $819,000

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$780,000+$140,000+21.9%
2025$640,000$00.0%
2024$640,000$00.0%
2023$640,000+$143,090+28.8%
2022$496,910$00.0%
2021$496,910$00.0%
2020$496,910——
6-year total+$283,090+57.0%