Cook County Value

3842 N Octavia Ave, Chicago, IL 60634

3 bed / 1 bath, 1,416 sqft, built 1930, in Jefferson. Assessor market value for 2025: $304,520.

Cook County account 12242140250000

Assessor market value
$304,520
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,416 sqft
$215 per sqft
Year built
1930
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 60634 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 $304,520 in 2024 to $304,520 in 2025.
  • Assessor market value per square footThe current public record shows about $215 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 60634.
  • Neighborhood value signalAmong 5,865 residential records in the same neighborhood, the average assessor market value is about $251 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.

  • 3410 N Overhill Ave, Chicago, IL 60634
    1,414 sqft | $191/sqft | built 1929 | Similar size (1,414 vs 1,416 sqft); Similar age (1929 vs 1930); Similar lot size (3,780 vs 3,810 sqft)
    $270,000
  • 3830 N Panama Ave, Chicago, IL 60634
    1,422 sqft | $253/sqft | built 1930 | Similar size (1,422 vs 1,416 sqft); Built same year (1930); Similar lot size (3,720 vs 3,810 sqft)
    $360,000
  • 3700 N Pioneer Ave, Chicago, IL 60634
    1,395 sqft | $201/sqft | built 1929 | Similar size (1,395 vs 1,416 sqft); Similar age (1929 vs 1930); Similar lot size (3,804 vs 3,810 sqft)
    $280,000
  • 3346 N Opal Ave, Chicago, IL 60634
    1,411 sqft | $213/sqft | built 1933 | Similar size (1,411 vs 1,416 sqft); Similar age (1933 vs 1930); Similar lot size (3,780 vs 3,810 sqft)
    $300,000
  • 7719 W Patterson Ave, Chicago, IL 60634
    1,433 sqft | $186/sqft | built 1931 | Similar size (1,433 vs 1,416 sqft); Similar age (1931 vs 1930); Similar lot size (3,750 vs 3,810 sqft)
    $266,430

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 21.9% in 2025 from 2024.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2025$304,520−$85,480−21.9%
2024$390,000+$155,880+66.6%
2023$234,120−$45,880−16.4%
2022$280,000$00.0%
2021$280,000+$46,720+20.0%
2020$233,280——
5-year total+$71,240+30.5%