Cook County Value

18431 De Jong Ln, Lansing, IL 60438

3 bed / 2 bath, 1,768 sqft, built 1978, in Thornton. Assessor market value for 2025: $250,000.

Cook County account 29363050060000

Assessor market value
$250,000
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,768 sqft
$141 per sqft
Year built
1978
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 60438 and Thornton assessment pages.

Appeal deadlines

Thornton 2026 appeal dates 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 $250,000 in 2024 to $250,000 in 2025.
  • Assessor market value per square footThe current public record shows about $141 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Thornton neighborhood and ZIP 60438.
  • Neighborhood value signalAmong 199 residential records in the same neighborhood, the average assessor market value is about $133 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values stayed about flat on average.

Comparable assessments

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

  • 2042 Hearth Cir, Lansing, IL 60438
    1,795 sqft | $134/sqft | built 1978 | Similar size (1,795 vs 1,768 sqft); Built same year (1978); Similar lot size (9,240 vs 8,820 sqft)
    $240,000
  • 18302 Bock Rd, Lansing, IL 60438
    1,794 sqft | $134/sqft | built 1973 | Similar size (1,794 vs 1,768 sqft); Similar age (1973 vs 1978); Similar lot size (9,170 vs 8,820 sqft)
    $240,010
  • 2043 Kettle Ct, Lansing, IL 60438
    1,758 sqft | $148/sqft | built 1978 | Similar size (1,758 vs 1,768 sqft); Built same year (1978); Similar lot size (9,102 vs 8,820 sqft)
    $260,000
  • 2030 185th St, Lansing, IL 60438
    1,837 sqft | $147/sqft | built 1978 | Similar size (1,837 vs 1,768 sqft); Built same year (1978); Similar lot size (8,524 vs 8,820 sqft)
    $270,000
  • 18518 Clyde Ave, Lansing, IL 60438
    1,804 sqft | $133/sqft | built 1978 | Similar size (1,804 vs 1,768 sqft); Built same year (1978); Lot 10% smaller (7,920 vs 8,820 sqft)
    $240,020

Recent comparable sales

No usable comparable sales are available in this data snapshot.

Public appraisal comparison for 2025. 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 2025 from 2024.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2025$250,000$00.0%
2024$250,000$00.0%
2023$250,000+$101,110+67.9%
2022$148,890$00.0%
2021$148,890+$200.0%
2020$148,870——
5-year total+$101,130+67.9%