Cook County Value

700 Blackthorn Rd, Winnetka, IL 60093

5 bed / 2 bath, 4,558 sqft, built 1937, in New Trier. Assessor market value for 2026: $2,525,900.

Cook County account 05174100130000

Assessor market value
$2,525,900
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
4,558 sqft
$554 per sqft
Year built
1937

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 $2,525,900 in 2025 to $2,525,900 in 2026.
  • Assessor market value per square footThe current public record shows about $554 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.

  • 148 De Windt Rd, Winnetka, IL 60093
    4,273 sqft | $510/sqft | built 1943 | 6% smaller (4,273 vs 4,558 sqft); Similar lot size (26,441 vs 28,462 sqft); Same neighborhood
    $2,177,400
  • 650 Hill Rd, Winnetka, IL 60093
    4,290 sqft | $608/sqft | built 1951 | 6% smaller (4,290 vs 4,558 sqft); Similar lot size (28,750 vs 28,462 sqft); Same neighborhood
    $2,610,000
  • 150 Birch St, Winnetka, IL 60093
    4,495 sqft | $482/sqft | built 1942 | Similar size (4,495 vs 4,558 sqft); Similar age (1942 vs 1937); Same neighborhood
    $2,165,400
  • 558 Ridge Ave, Winnetka, IL 60093
    4,222 sqft | $482/sqft | built 1938 | 7% smaller (4,222 vs 4,558 sqft); Similar age (1938 vs 1937); Lot 13% smaller (24,699 vs 28,462 sqft)
    $2,036,490
  • 84 Woodley Rd, Winnetka, IL 60093
    4,757 sqft | $437/sqft | built 1950 | Similar size (4,757 vs 4,558 sqft); Similar lot size (26,158 vs 28,462 sqft); Same neighborhood
    $2,078,700

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

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$2,525,900$00.0%
2025$2,525,900+$819,750+48.0%
2024$1,706,150$00.0%
2023$1,706,150$00.0%
2022$1,706,150+$273,700+19.1%
2021$1,432,450+$100.0%
2020$1,432,440——
6-year total+$1,093,460+76.3%