Cook County Value

42 E 138th St Riverdale, IL 60827

18 bed / 6 bath, 4,636 sqft, built 1961, in Thornton. Assessor market value for 2025: $206,240.

Cook County account 29042050430000

Assessor market value
$206,240
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
4,636 sqft
$44 per sqft
Year built
1961
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 60827 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 $206,240 in 2024 to $206,240 in 2025.
  • Assessor market value per square footThe current public record shows about $44 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 60827.
  • Neighborhood value signalAmong 1,371 residential records in the same neighborhood, the average assessor market value is about $72 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.

  • 13947 S Wabash Ave Riverdale, IL 60827
    4,293 sqft | $49/sqft | built 1961 | 7% smaller (4,293 vs 4,636 sqft); Built same year (1961); Similar lot size (5,583 vs 5,175 sqft)
    $210,000
  • 13940 S Edbrooke Ave Riverdale, IL 60827
    3,906 sqft | $43/sqft | built 1961 | Built same year (1961); Similar lot size (5,534 vs 5,175 sqft); Same quality (Average)
    $167,620
  • 40 E 138th St Riverdale, IL 60827
    3,312 sqft | $45/sqft | built 1960 | Similar age (1960 vs 1961); Similar lot size (5,175 vs 5,175 sqft); Same quality (Average)
    $148,250
  • 10 W 138th St 2e Riverdale, IL 60827
    4,050 sqft | $22/sqft | built 1961 | 13% smaller (4,050 vs 4,636 sqft); Built same year (1961); Same quality (Average)
    $90,000
  • 10 W 138th St 2e Riverdale, IL 60827
    4,050 sqft | $22/sqft | built 1961 | 13% smaller (4,050 vs 4,636 sqft); Built same year (1961); Same quality (Average)
    $90,000

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$206,240$00.0%
2024$206,240−$17,340−7.8%
2023$223,580+$103,570+86.3%
2022$120,010$00.0%
2021$120,010−$45,510−27.5%
2020$165,520——
5-year total+$40,720+24.6%