Cook County Value

280 White Oak Ln, Winnetka, IL 60093

7 bed / 4 bath, 8,788 sqft, built 1942, in New Trier. Assessor market value for 2026: $4,792,290.

Cook County account 05204000450000

Assessor market value
$4,792,290
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
8,788 sqft
$545 per sqft
Year built
1942

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 decreased 5.1% from $5,052,000 in 2025 to $4,792,290 in 2026.
  • Assessor market value per square footThe current public record shows about $545 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 608 residential records in the same neighborhood, the average assessor market value is about $670 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.3% on average.

Comparable assessments

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

  • 17 Woodley Rd, Winnetka, IL 60093
    9,060 sqft | $385/sqft | built 1951 | Similar size (9,060 vs 8,788 sqft); Lot 12% larger (60,208 vs 53,797 sqft); Same neighborhood
    $3,490,000
  • 96 Woodley Rd, Winnetka, IL 60093
    7,659 sqft | $537/sqft | built 1944 | 13% smaller (7,659 vs 8,788 sqft); Similar age (1944 vs 1942); Similar lot size (51,401 vs 53,797 sqft)
    $4,114,540
  • 1180 Westmoor Rd, Winnetka, IL 60093
    8,085 sqft | $508/sqft | built 1928 | 8% smaller (8,085 vs 8,788 sqft); Similar lot size (58,588 vs 53,797 sqft); Same neighborhood
    $4,110,000
  • 969 Hill Rd, Winnetka, IL 60093
    7,797 sqft | $791/sqft | built 1937 | 11% smaller (7,797 vs 8,788 sqft); Similar age (1937 vs 1942); Similar lot size (58,196 vs 53,797 sqft)
    $6,167,050
  • 720 Ardsley Rd, Winnetka, IL 60093
    7,929 sqft | $844/sqft | built 1937 | 10% smaller (7,929 vs 8,788 sqft); Similar age (1937 vs 1942); Same neighborhood
    $6,689,560

Recent comparable sales

Sales selected by similarity to the subject property.

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

Down 5.1% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$4,792,290−$259,710−5.1%
2025$5,052,000+$2,055,160+68.6%
2024$2,996,840−$367,970−10.9%
2023$3,364,810$00.0%
2022$3,364,810+$1,840,390+120.7%
2021$1,524,420+$100.0%
2020$1,524,410——
6-year total+$3,267,880+214.4%