Cook County Value

6620 N Oconto Ave, Chicago, IL 60631

4 bed / 2 bath, 2,265 sqft, built 1934, in Jefferson. Assessor market value for 2025: $583,810.

Cook County account 09364140270000

Assessor market value
$583,810
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,265 sqft
$258 per sqft
Year built
1934
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 60631 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 $583,810 in 2024 to $583,810 in 2025.
  • Assessor market value per square footThe current public record shows about $258 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 60631.
  • Neighborhood value signalAmong 1,989 residential records in the same neighborhood, the average assessor market value is about $282 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.

  • 6730 N Octavia Ave, Chicago, IL 60631
    2,283 sqft | $219/sqft | built 1938 | Similar size (2,283 vs 2,265 sqft); Similar age (1938 vs 1934); Similar lot size (4,166 vs 4,125 sqft)
    $498,880
  • 7220 W Pratt Ave Hse, Chicago, IL 60631
    2,273 sqft | $246/sqft | built 1929 | Similar size (2,273 vs 2,265 sqft); Similar age (1929 vs 1934); Similar lot size (3,968 vs 4,125 sqft)
    $558,600
  • 6600 N Oconto Ave, Chicago, IL 60631
    2,235 sqft | $277/sqft | built 1930 | Similar size (2,235 vs 2,265 sqft); Similar age (1930 vs 1934); Similar lot size (4,125 vs 4,125 sqft)
    $620,010
  • 6754 N Oconto Ave, Chicago, IL 60631
    2,218 sqft | $250/sqft | built 1931 | Similar size (2,218 vs 2,265 sqft); Similar age (1931 vs 1934); Similar lot size (4,125 vs 4,125 sqft)
    $554,720
  • 6727 N Odell Ave, Chicago, IL 60631
    2,298 sqft | $247/sqft | built 1929 | Similar size (2,298 vs 2,265 sqft); Similar age (1929 vs 1934); Similar lot size (4,250 vs 4,125 sqft)
    $567,230

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

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$583,810$00.0%
2024$583,810+$33,810+6.1%
2023$550,000$00.0%
2022$550,000$00.0%
2021$550,000+$261,490+90.6%
2020$288,510——
5-year total+$295,300+102.4%