Cook County Value

675 Blackthorn Rd, Winnetka, IL 60093

5 bed / 7 bath, 5,622 sqft, built 2012, in New Trier Assessor market value for 2026: $4,213,010.

Cook County account 05174110020000

Assessor market value
$4,213,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
5,622 sqft
$749 per sqft
Year built
2012
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 $4,213,010 in 2025 to $4,213,010 in 2026.
  • Assessor market value per square footThe current public record shows about $749 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

Similar public appraisal records selected for this property's equity comparison.

  • 1045 Starr Rd, Winnetka, IL 60093
    5,656 sqft | $743/sqft | built 2014 | Similar size (5,656 vs 5,622 sqft); Similar age (2014 vs 2012); Similar lot size (18,800 vs 20,385 sqft)
    $4,200,000
  • 1055 Starr Rd, Winnetka, IL 60093
    5,531 sqft | $651/sqft | built 2012 | Similar size (5,531 vs 5,622 sqft); Built same year (2012); Similar lot size (18,800 vs 20,385 sqft)
    $3,603,340
  • 255 Locust Rd, Winnetka, IL 60093
    5,885 sqft | $594/sqft | built 2004 | Similar size (5,885 vs 5,622 sqft); Similar lot size (19,428 vs 20,385 sqft); Same quality (Average)
    $3,493,950
  • 975 Pine St, Winnetka, IL 60093
    5,907 sqft | $625/sqft | built 2008 | 5% larger (5,907 vs 5,622 sqft); Similar age (2008 vs 2012); Similar lot size (18,800 vs 20,385 sqft)
    $3,691,700
  • 880 Sunset Rd, Winnetka, IL 60093
    6,075 sqft | $630/sqft | built 2016 | 8% larger (6,075 vs 5,622 sqft); Similar age (2016 vs 2012); Similar lot size (21,824 vs 20,385 sqft)
    $3,827,600

Recent comparable sales

Sales selected by similarity to the subject property.

  • 1171 Lindenwood Dr, Winnetka, IL 60093
    6,565 sqft | $647/sqft | built 2007 | Moderate age difference (5 years older); Same beds (5)
    $4,250,000
  • 880 Sunset Rd, Winnetka, IL 60093
    6,075 sqft | $1,119/sqft | built 2016 | 8% size difference (6,075 sqft); Moderate age difference (4 years newer); Within 1 bedroom (6 vs 5)
    $6,800,000

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

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$4,213,010$00.0%
2025$4,213,010+$1,457,880+52.9%
2024$2,755,130−$142,800−4.9%
2023$2,897,930−$1,420,530−32.9%
2022$4,318,460+$2,266,750+110.5%
2021$2,051,710−$199,020−8.8%
2020$2,250,730——
6-year total+$1,962,280+87.2%