Cook County Value

525 Ash St, Winnetka, IL 60093

5 bed / 4 bath, 3,904 sqft, built 2024, in New Trier. Assessor market value for 2026: $3,012,760.

Cook County account 05211250070000

Assessor market value
$3,012,760
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,904 sqft
$772 per sqft
Year built
2024
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 decreased 21.9% from $3,860,000 in 2025 to $3,012,760 in 2026.
  • Assessor market value per square footThe current public record shows about $772 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.

  • 870 Locust St, Winnetka, IL 60093
    3,857 sqft | $690/sqft | built 2023 | Similar size (3,857 vs 3,904 sqft); Similar age (2023 vs 2024); Similar lot size (12,750 vs 13,651 sqft)
    $2,661,150
  • 840 Locust St, Winnetka, IL 60093
    4,142 sqft | $659/sqft | built 2018 | 6% larger (4,142 vs 3,904 sqft); Similar lot size (14,550 vs 13,651 sqft); Same quality (Average)
    $2,728,940
  • 1144 Asbury Ave, Winnetka, IL 60093
    3,917 sqft | $656/sqft | built 2013 | Similar size (3,917 vs 3,904 sqft); Lot 13% smaller (11,925 vs 13,651 sqft); Same quality (Average)
    $2,569,550
  • 807 Prospect Ave, Winnetka, IL 60093
    3,840 sqft | $715/sqft | built 2013 | Similar size (3,840 vs 3,904 sqft); Lot 12% smaller (12,000 vs 13,651 sqft); Same quality (Average)
    $2,747,420
  • 560 Sheridan Rd, Winnetka, IL 60093
    4,079 sqft | $754/sqft | built 2022 | Similar size (4,079 vs 3,904 sqft); Similar age (2022 vs 2024); Lot 10% smaller (12,240 vs 13,651 sqft)
    $3,075,650

Recent comparable sales

Sales selected by similarity to the subject property.

  • 358 Winnetka Ave, IL 60093
    3,631 sqft | $826/sqft | built 2004 | 7% size difference (3,631 sqft); Within 1 bedroom (4 vs 5)
    $3,000,000

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 21.9% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$3,012,760−$847,240−21.9%
2025$3,860,000+$2,152,050+126.0%
2024$1,707,950+$787,950+85.6%
2023$920,000$00.0%
2022$920,000+$102,900+12.6%
2021$817,100−$74,590−8.4%
2020$891,690——
6-year total+$2,121,070+237.9%