Cook County Value

13884 Oak Tree Ln Lemont, IL 60439

4 bed / 3 bath, 3,837 sqft, built 1996, in Lemont. Assessor market value for 2026: $870,000.

Cook County account 22272050150000

Assessor market value
$870,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,837 sqft
$227 per sqft
Year built
1996
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 35.6% from $641,560 in 2025 to $870,000 in 2026.
  • Assessor market value per square footThe current public record shows about $227 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

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

  • 13866 Oak Tree Ln Lemont, IL 60439
    3,852 sqft | $218/sqft | built 1996 | Similar size (3,852 vs 3,837 sqft); Built same year (1996); Similar lot size (15,000 vs 15,000 sqft)
    $840,000
  • 12584 Thornberry Dr Lemont, IL 60439
    3,816 sqft | $238/sqft | built 2005 | Similar size (3,816 vs 3,837 sqft); Similar lot size (14,811 vs 15,000 sqft); Same quality (Average)
    $910,000
  • 13696 Cambridge Dr Lemont, IL 60439
    3,695 sqft | $244/sqft | built 2001 | Similar size (3,695 vs 3,837 sqft); Similar age (2001 vs 1996); Similar lot size (14,905 vs 15,000 sqft)
    $900,000
  • 12595 Thornberry Dr Lemont, IL 60439
    3,736 sqft | $244/sqft | built 2005 | Similar size (3,736 vs 3,837 sqft); Similar lot size (14,786 vs 15,000 sqft); Same quality (Average)
    $910,000
  • 12003 Holly Ct Lemont, IL 60439
    3,640 sqft | $217/sqft | built 1999 | 5% smaller (3,640 vs 3,837 sqft); Similar age (1999 vs 1996); Similar lot size (15,000 vs 15,000 sqft)
    $790,000

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: . 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

Up 35.6% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$870,000+$228,440+35.6%
2025$641,560$00.0%
2024$641,560−$48,440−7.0%
2023$690,000+$27,860+4.2%
2022$662,140$00.0%
2021$662,140$00.0%
2020$662,140——
6-year total+$207,860+31.4%