Cook County Value

21 E 137th St Riverdale, IL 60827

3 bed / 1 bath, 1,728 sqft, built 1898, in Calumet. Assessor market value for 2026: $70,000.

Cook County account 25334060140000

Assessor market value
$70,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,728 sqft
$41 per sqft
Year built
1898
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 Calumet assessment pages.

Local guide: Calumet Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Calumet, appeals to the Assessor closed . Board of Review dates for Calumet 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 27.3% from $55,000 in 2025 to $70,000 in 2026.
  • Assessor market value per square footThe current public record shows about $41 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Calumet neighborhood and ZIP 60827.
  • Neighborhood value signalAmong 432 residential records in the same neighborhood, the average assessor market value is about $49 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.0% on average.

Comparable assessments

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

  • 8 W 137th Pl Riverdale, IL 60827
    1,700 sqft | $41/sqft | built 1908 | Similar size (1,700 vs 1,728 sqft); Similar lot size (4,687 vs 4,331 sqft); Same quality (Average)
    $70,000
  • 13602 S State St Riverdale, IL 60827
    1,567 sqft | $57/sqft | built 1908 | 9% smaller (1,567 vs 1,728 sqft); Similar lot size (4,250 vs 4,331 sqft); Same quality (Average)
    $90,000
  • 13742 S Wabash Ave Riverdale, IL 60827
    1,584 sqft | $44/sqft | built 1908 | 8% smaller (1,584 vs 1,728 sqft); Similar lot size (4,150 vs 4,331 sqft); Same quality (Average)
    $70,000
  • 5 E 137th St Riverdale, IL 60827
    1,808 sqft | $50/sqft | built 1911 | Similar size (1,808 vs 1,728 sqft); Lot 13% smaller (3,780 vs 4,331 sqft); Same quality (Average)
    $90,010
  • 4 W 137th St Riverdale, IL 60827
    1,645 sqft | $35/sqft | built 1906 | Similar size (1,645 vs 1,728 sqft); Lot 17% smaller (3,575 vs 4,331 sqft); Same quality (Average)
    $57,590

Recent comparable sales

No usable comparable sales are available in this data snapshot.

Public appraisal comparison for 2026. 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

Up 27.3% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$70,000+$15,000+27.3%
2025$55,000$00.0%
2024$55,000$00.0%
2023$55,000+$12,500+29.4%
2022$42,500$00.0%
2021$42,500+$200.0%
2020$42,480——
6-year total+$27,520+64.8%