Cook County Value

2423 N Kostner Ave, Chicago, IL 60639

6 bed / 2 bath, 2,442 sqft, built 1916, in Jefferson. Assessor market value for 2025: $428,790.

Cook County account 13274160110000

In line with similar homes

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

Assessor market value$428,790
Similar homes$430,011
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
$428,790
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,442 sqft
$176 per sqft
Year built
1916
Average quality

What we found

Similar homes' assessments

Weak

4 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $176.09/sqft, which supports a value of $430,011.

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 60639 and Jefferson assessment pages.

Appeal deadlines

Jefferson 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 $428,790 in 2024 to $428,790 in 2025.
  • Assessor market value per square footThe current public record shows about $176 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Jefferson neighborhood and ZIP 60639.
  • Neighborhood value signalAmong 3,288 residential records in the same neighborhood, the average assessor market value is about $239 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.

  • 4055 W Oakdale Ave, Chicago, IL 60641
    2,444 sqft | $188/sqft | built 1918 | Similar size (2,444 vs 2,442 sqft); Similar age (1918 vs 1916); Similar lot size (3,750 vs 3,906 sqft)
    $460,000
  • 4130 W Oakdale Ave, Chicago, IL 60641
    2,442 sqft | $192/sqft | built 1920 | Similar size (2,442 vs 2,442 sqft); Similar age (1920 vs 1916); Similar lot size (3,750 vs 3,906 sqft)
    $470,000
  • 2431 N Kostner Ave, Chicago, IL 60639
    2,442 sqft | $176/sqft | built 1915 | Similar size (2,442 vs 2,442 sqft); Similar age (1915 vs 1916); Similar lot size (3,906 vs 3,906 sqft)
    $430,000
  • 4255 W Nelson St, Chicago, IL 60641
    2,472 sqft | $158/sqft | built 1919 | Similar size (2,472 vs 2,442 sqft); Similar age (1919 vs 1916); Similar lot size (3,750 vs 3,906 sqft)
    $390,000
  • 4339 W Drummond Pl, Chicago, IL 60639
    2,424 sqft | $168/sqft | built 1916 | Similar size (2,424 vs 2,442 sqft); Built same year (1916); Similar lot size (3,750 vs 3,906 sqft)
    $407,370

Recent comparable sales

Sales selected by similarity to the subject property.

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 2.5% in 2025 from 2024.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2025$428,790−$11,210−2.5%
2024$440,000+$104,500+31.1%
2023$335,500−$21,000−5.9%
2022$356,500$00.0%
2021$356,500+$110,230+44.8%
2020$246,270——
5-year total+$182,520+74.1%