Cook County Value

525 Forsythe Ave, Calumet City, IL 60409

3 bed / 1 bath, 1,144 sqft, built 1917, in Thornton. Assessor market value for 2025: $80,000.

Cook County account 30084020200000

Assessor market value
$80,000
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,144 sqft
$70 per sqft
Year built
1917
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 60409 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 $80,000 in 2024 to $80,000 in 2025.
  • Assessor market value per square footThe current public record shows about $70 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 60409.
  • Neighborhood value signalAmong 3,371 residential records in the same neighborhood, the average assessor market value is about $87 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.

  • 207 156th St, Calumet City, IL 60409
    1,150 sqft | $72/sqft | built 1922 | Similar size (1,150 vs 1,144 sqft); Similar age (1922 vs 1917); Similar lot size (6,200 vs 6,200 sqft)
    $82,800
  • 8 Warren St, Calumet City, IL 60409
    1,144 sqft | $70/sqft | built 1916 | Similar size (1,144 vs 1,144 sqft); Similar age (1916 vs 1917); Similar lot size (5,850 vs 6,200 sqft)
    $79,680
  • 136 157th St, Calumet City, IL 60409
    1,140 sqft | $75/sqft | built 1923 | Similar size (1,140 vs 1,144 sqft); Similar lot size (6,100 vs 6,200 sqft); Same quality (Average)
    $85,000
  • 7 Warren St, Calumet City, IL 60409
    1,159 sqft | $70/sqft | built 1918 | Similar size (1,159 vs 1,144 sqft); Similar age (1918 vs 1917); Similar lot size (5,850 vs 6,200 sqft)
    $81,000
  • 245 153rd Pl, Calumet City, IL 60409
    1,157 sqft | $112/sqft | built 1924 | Similar size (1,157 vs 1,144 sqft); Similar lot size (6,250 vs 6,200 sqft); Same quality (Average)
    $130,000

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: . 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$80,000$00.0%
2024$80,000$00.0%
2023$80,000+$9,910+14.1%
2022$70,090$00.0%
2021$70,090$00.0%
2020$70,090——
5-year total+$9,910+14.1%