Cook County Value

236 Mason St, Calumet City, IL 60409

3 bed / 1 bath, 1,152 sqft, built 1925, in Thornton. Assessor market value for 2025: $79,890.

Cook County account 30173050150000

In line with similar homes

8 similar homes nearby support a value at or above your county value.

Assessor market value$79,890
Similar homes$89,879
No gap: similar homes are at or above the county value · bars start at $0

How sure: High · 8 similar homes (5 shown below) · public records only

Assessor market value
$79,890
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,152 sqft
$69 per sqft
Year built
1925
Average quality

What we found

Similar homes' assessments

Weak

3 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $77.99/sqft, but land is valued apart from the home, and some of them have less land value per square foot of home than yours, which counts as $18,720. Counting your land in place of theirs where theirs is less, they support a value of $89,879.

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 $79,890 in 2024 to $79,890 in 2025.
  • Assessor market value per square footThe current public record shows about $69 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

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

  • 227 Mason St, Calumet City, IL 60409
    1,144 sqft | $66/sqft | built 1925 | Similar size (1,144 vs 1,152 sqft); Built same year (1925); Similar lot size (4,680 vs 4,680 sqft)
    $75,000
  • 228 Webb St, Calumet City, IL 60409
    1,154 sqft | $78/sqft | built 1926 | Similar size (1,154 vs 1,152 sqft); Similar age (1926 vs 1925); Similar lot size (4,680 vs 4,680 sqft)
    $90,000
  • 306 Webb St, Calumet City, IL 60409
    1,166 sqft | $86/sqft | built 1925 | Similar size (1,166 vs 1,152 sqft); Built same year (1925); Similar lot size (4,680 vs 4,680 sqft)
    $100,000
  • 244 Mason St, Calumet City, IL 60409
    1,144 sqft | $63/sqft | built 1924 | Similar size (1,144 vs 1,152 sqft); Similar age (1924 vs 1925); Similar lot size (4,680 vs 4,680 sqft)
    $72,030
  • 309 Webb St, Calumet City, IL 60409
    1,160 sqft | $82/sqft | built 1924 | Similar size (1,160 vs 1,152 sqft); Similar age (1924 vs 1925); Similar lot size (4,680 vs 4,680 sqft)
    $95,000

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

Down 20.1% in 2025 from 2024.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2025$79,890−$20,110−20.1%
2024$100,000$00.0%
2023$100,000+$23,420+30.6%
2022$76,580$00.0%
2021$76,580$00.0%
2020$76,580——
5-year total+$3,310+4.3%