Cook County Value

6647 N Onarga Ave, Chicago, IL 60631

4 bed / 2 bath, 2,271 sqft, built 1925, in Jefferson. Assessor market value for 2025: $548,910.

Cook County account 09364120150000

Assessor market value
$548,910
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,271 sqft
$242 per sqft
Year built
1925
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 $548,910 in 2024 to $548,910 in 2025.
  • Assessor market value per square footThe current public record shows about $242 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.

  • 6453 N Oxford Ave, Chicago, IL 60631
    2,320 sqft | $207/sqft | built 1925 | Similar size (2,320 vs 2,271 sqft); Built same year (1925); Similar lot size (4,687 vs 4,687 sqft)
    $480,010
  • 6732 N Odell Ave, Chicago, IL 60631
    2,288 sqft | $271/sqft | built 1926 | Similar size (2,288 vs 2,271 sqft); Similar age (1926 vs 1925); Similar lot size (4,375 vs 4,687 sqft)
    $620,010
  • 7036 N Ozark Ave, Chicago, IL 60631
    2,311 sqft | $244/sqft | built 1925 | Similar size (2,311 vs 2,271 sqft); Built same year (1925); Similar lot size (4,399 vs 4,687 sqft)
    $563,870
  • 6665 N Octavia Ave, Chicago, IL 60631
    2,272 sqft | $266/sqft | built 1926 | Similar size (2,272 vs 2,271 sqft); Similar age (1926 vs 1925); Similar lot size (4,250 vs 4,687 sqft)
    $604,270
  • 6657 N Onarga Ave, Chicago, IL 60631
    2,247 sqft | $236/sqft | built 1931 | Similar size (2,247 vs 2,271 sqft); Similar lot size (4,687 vs 4,687 sqft); Same quality (Average)
    $530,010

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 10.0% in 2025 from 2024.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2025$548,910−$61,100−10.0%
2024$610,010+$90,010+17.3%
2023$520,000$00.0%
2022$520,000$00.0%
2021$520,000+$9,820+1.9%
2020$510,180——
5-year total+$38,730+7.6%