Cook County Value

18117 Whitman Ln, Lansing, IL 60438

4 bed / 2 bath, 2,292 sqft, built 1987, in Thornton. Assessor market value for 2025: $284,320.

Cook County account 29361100290000

Assessor market value
$284,320
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,292 sqft
$124 per sqft
Year built
1987
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 $284,320 in 2024 to $284,320 in 2025.
  • Assessor market value per square footThe current public record shows about $124 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.

  • 18070 Whitman Ln, Lansing, IL 60438
    2,286 sqft | $130/sqft | built 1985 | Similar size (2,286 vs 2,292 sqft); Similar age (1985 vs 1987); Similar lot size (11,328 vs 10,936 sqft)
    $298,170
  • 1835 185th St, Lansing, IL 60438
    2,213 sqft | $123/sqft | built 1988 | Similar size (2,213 vs 2,292 sqft); Similar age (1988 vs 1987); Similar lot size (11,013 vs 10,936 sqft)
    $273,240
  • 1655 185th St, Lansing, IL 60438
    2,142 sqft | $118/sqft | built 1989 | 6% smaller (2,142 vs 2,292 sqft); Similar age (1989 vs 1987); Similar lot size (10,878 vs 10,936 sqft)
    $252,400
  • 1838 185th St, Lansing, IL 60438
    2,161 sqft | $125/sqft | built 1988 | 6% smaller (2,161 vs 2,292 sqft); Similar age (1988 vs 1987); Similar lot size (10,762 vs 10,936 sqft)
    $270,000
  • 18555 Country Ln, Lansing, IL 60438
    2,210 sqft | $127/sqft | built 1996 | Similar size (2,210 vs 2,292 sqft); Similar lot size (10,717 vs 10,936 sqft); Same quality (Average)
    $280,380

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

Down 9.0% in 2025 from 2024.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2025$284,320−$28,060−9.0%
2024$312,380$00.0%
2023$312,380+$131,160+72.4%
2022$181,220−$12,390−6.4%
2021$193,610+$100.0%
2020$193,600——
5-year total+$90,720+46.9%