Cook County Value

17550 William St, Lansing, IL 60438

4 bed / 2 bath, 1,380 sqft, built 1965, in Thornton. Assessor market value for 2025: $151,000.

Cook County account 30293250170000

Assessor market value
$151,000
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,380 sqft
$109 per sqft
Year built
1965
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 $151,000 in 2024 to $151,000 in 2025.
  • Assessor market value per square footThe current public record shows about $109 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 2,724 residential records in the same neighborhood, the average assessor market value is about $102 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values stayed about flat on average.

Comparable assessments

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

  • 17627 Paxton Ave, Lansing, IL 60438
    1,381 sqft | $96/sqft | built 1967 | Similar size (1,381 vs 1,380 sqft); Similar age (1967 vs 1965); Similar lot size (11,600 vs 11,200 sqft)
    $133,000
  • 18106 Paxton Ave, Lansing, IL 60438
    1,361 sqft | $107/sqft | built 1959 | Similar size (1,361 vs 1,380 sqft); Similar lot size (11,160 vs 11,200 sqft); Same quality (Average)
    $145,000
  • 17932 Decker Ave, Lansing, IL 60438
    1,359 sqft | $118/sqft | built 1967 | Similar size (1,359 vs 1,380 sqft); Similar age (1967 vs 1965); Similar lot size (10,292 vs 11,200 sqft)
    $160,000
  • 17879 Clyde Ave, Lansing, IL 60438
    1,358 sqft | $93/sqft | built 1955 | Similar size (1,358 vs 1,380 sqft); Similar lot size (11,160 vs 11,200 sqft); Same quality (Average)
    $126,000
  • 17536 William St, Lansing, IL 60438
    1,406 sqft | $107/sqft | built 1967 | Similar size (1,406 vs 1,380 sqft); Similar age (1967 vs 1965); Lot 18% smaller (9,240 vs 11,200 sqft)
    $151,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 17044 Oakwood Ave, Lansing, IL 60438
    1,343 sqft | $143/sqft | built 1957 | Similar size (1,343 sqft); Moderate age difference (8 years older); Same beds (4)
    $192,000
  • 3046 192nd St, Lansing, IL 60438
    1,175 sqft | $260/sqft | built 1971 | 15% size difference (1,175 sqft); Moderate age difference (6 years newer); Within 1 bedroom (3 vs 4)
    $305,000

Public appraisal comparison for 2025. 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

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$151,000$00.0%
2024$151,000$00.0%
2023$151,000+$42,190+38.8%
2022$108,810$00.0%
2021$108,810$00.0%
2020$108,810——
5-year total+$42,190+38.8%