Cook County Value

3827 N Keystone Ave, Chicago, IL 60641

6 bed / 2 bath, 2,616 sqft, built 1908, in Jefferson. Assessor market value for 2025: $633,310.

Cook County account 13222130080000

Assessor market value
$633,310
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,616 sqft
$242 per sqft
Year built
1908
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 60641 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 $633,310 in 2024 to $633,310 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 60641.
  • Neighborhood value signalAmong 1,215 residential records in the same neighborhood, the average assessor market value is about $329 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.

  • 4140 N Pulaski Rd, Chicago, IL 60641
    2,580 sqft | $221/sqft | built 1913 | Similar size (2,580 vs 2,616 sqft); Similar age (1913 vs 1908); Similar lot size (6,960 vs 6,960 sqft)
    $570,000
  • 4252 N Lowell Ave, Chicago, IL 60641
    2,568 sqft | $350/sqft | built 1909 | Similar size (2,568 vs 2,616 sqft); Similar age (1909 vs 1908); Similar lot size (6,800 vs 6,960 sqft)
    $897,770
  • 3826 N Lowell Ave 2, Chicago, IL 60641
    2,551 sqft | $345/sqft | built 1911 | Similar size (2,551 vs 2,616 sqft); Similar age (1911 vs 1908); Similar lot size (7,200 vs 6,960 sqft)
    $880,000
  • 4310 N Kildare Ave, Chicago, IL 60641
    2,718 sqft | $221/sqft | built 1909 | Similar size (2,718 vs 2,616 sqft); Similar age (1909 vs 1908); Similar lot size (7,200 vs 6,960 sqft)
    $600,000
  • 3933 N Lowell Ave, Chicago, IL 60641
    2,691 sqft | $268/sqft | built 1899 | Similar size (2,691 vs 2,616 sqft); Similar lot size (7,200 vs 6,960 sqft); Same quality (Average)
    $722,310

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: . Showing the last prepared sales evidence while recent sales are refreshed. 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$633,310$00.0%
2024$633,310+$101,270+19.0%
2023$532,040−$67,960−11.3%
2022$600,000$00.0%
2021$600,000+$141,960+31.0%
2020$458,040——
5-year total+$175,270+38.3%