Cook County Value

644 Oak St, Winnetka, IL 60093

7 bed / 3 bath, 6,162 sqft, built 1893, in New Trier. Assessor market value for 2026: $2,890,000.

Cook County account 05211160060000

Assessor market value
$2,890,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
6,162 sqft
$469 per sqft
Year built
1893
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 60093 and New Trier assessment pages.

Local guide: New Trier Township 2026 Property Tax Appeal Guide.

Appeal deadlines

The 2026 appeal windows for New Trier have closed (Assessor , Board of Review ). 2027 notices usually start in March.

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 $2,890,000 in 2025 to $2,890,000 in 2026.
  • Assessor market value per square footThe current public record shows about $469 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the New Trier neighborhood and ZIP 60093.
  • Neighborhood value signalAmong 1,469 residential records in the same neighborhood, the average assessor market value is about $518 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.0% on average.

Comparable assessments

Showing 5 of the 8 similar homes in this property's equity comparison, from public appraisal records.

  • 646 Prospect Ave, Winnetka, IL 60093
    6,135 sqft | $564/sqft | built 1898 | Similar size (6,135 vs 6,162 sqft); Similar age (1898 vs 1893); Lot 12% larger (18,750 vs 16,769 sqft)
    $3,460,000
  • 721 Lincoln Ave, Winnetka, IL 60093
    5,828 sqft | $420/sqft | built 1907 | 5% smaller (5,828 vs 6,162 sqft); Similar lot size (17,250 vs 16,769 sqft); Same quality (Average)
    $2,450,000
  • 640 Pine St, Winnetka, IL 60093
    5,436 sqft | $486/sqft | built 1904 | 12% smaller (5,436 vs 6,162 sqft); Similar lot size (15,750 vs 16,769 sqft); Same quality (Average)
    $2,640,000
  • 844 Bryant Ave, Winnetka, IL 60093
    5,396 sqft | $463/sqft | built 1905 | 12% smaller (5,396 vs 6,162 sqft); Lot 11% smaller (15,000 vs 16,769 sqft); Same quality (Average)
    $2,500,000
  • 788 Walden Rd, Winnetka, IL 60093
    5,228 sqft | $444/sqft | built 1882 | Similar lot size (16,900 vs 16,769 sqft); Same quality (Average); Same neighborhood
    $2,322,700

Recent comparable sales

No usable comparable sales are available in this data snapshot.

Public appraisal comparison for 2026. 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 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$2,890,000$00.0%
2025$2,890,000+$920,000+46.7%
2024$1,970,000$00.0%
2023$1,970,000$00.0%
2022$1,970,000+$257,780+15.1%
2021$1,712,220$00.0%
2020$1,712,220——
6-year total+$1,177,780+68.8%