Cook County Value

630 Blackthorn Rd, Winnetka, IL 60093

6 bed / 3 bath, 5,254 sqft, built 1924, in New Trier. Assessor market value for 2026: $2,627,580.

Cook County account 05174100200000

Assessor market value
$2,627,580
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
5,254 sqft
$500 per sqft
Year built
1924
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 increased 8.1% from $2,430,000 in 2025 to $2,627,580 in 2026.
  • Assessor market value per square footThe current public record shows about $500 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.

  • 649 Locust St, Winnetka, IL 60093
    5,426 sqft | $549/sqft | built 1925 | Similar size (5,426 vs 5,254 sqft); Similar age (1925 vs 1924); Similar lot size (18,870 vs 19,000 sqft)
    $2,980,170
  • 1034 Westmoor Rd, Winnetka, IL 60093
    5,128 sqft | $486/sqft | built 1920 | Similar size (5,128 vs 5,254 sqft); Similar age (1920 vs 1924); Similar lot size (18,700 vs 19,000 sqft)
    $2,490,000
  • 1015 Dinsmore Rd, Winnetka, IL 60093
    4,853 sqft | $509/sqft | built 1923 | 8% smaller (4,853 vs 5,254 sqft); Similar age (1923 vs 1924); Similar lot size (18,800 vs 19,000 sqft)
    $2,470,000
  • 1056 Dinsmore Rd, Winnetka, IL 60093
    4,995 sqft | $494/sqft | built 1920 | Similar size (4,995 vs 5,254 sqft); Similar age (1920 vs 1924); Similar lot size (18,800 vs 19,000 sqft)
    $2,465,590
  • 1028 Starr Rd, Winnetka, IL 60093
    5,894 sqft | $471/sqft | built 1923 | 12% larger (5,894 vs 5,254 sqft); Similar age (1923 vs 1924); Similar lot size (18,800 vs 19,000 sqft)
    $2,776,480

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: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 8.1% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$2,627,580+$197,580+8.1%
2025$2,430,000+$776,000+46.9%
2024$1,654,000$00.0%
2023$1,654,000$00.0%
2022$1,654,000+$226,210+15.8%
2021$1,427,790$00.0%
2020$1,427,790——
6-year total+$1,199,790+84.0%