Cook County Value

321 Chestnut St, Winnetka, IL 60093

4 bed / 2 bath, 4,206 sqft, built 2007, in New Trier Assessor market value for 2026: $2,162,470.

Cook County account 05204020150000

Assessor market value
$2,162,470
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
4,206 sqft
$514 per sqft
Year built
2007
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 3.9% from $2,250,000 in 2025 to $2,162,470 in 2026.
  • Assessor market value per square footThe current public record shows about $514 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 308 residential records in the same neighborhood, the average assessor market value is about $461 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.4% on average.

Comparable assessments

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

  • 785 Mt Pleasant St, Winnetka, IL 60093
    4,351 sqft | $496/sqft | built 2007 | Similar size (4,351 vs 4,206 sqft); Built same year (2007); Similar lot size (12,000 vs 11,452 sqft)
    $2,158,630
  • 276 Forest St, Winnetka, IL 60093
    4,208 sqft | $656/sqft | built 2009 | Similar size (4,208 vs 4,206 sqft); Similar age (2009 vs 2007); Lot 15% larger (13,200 vs 11,452 sqft)
    $2,760,000
  • 117 Church Rd, Winnetka, IL 60093
    4,128 sqft | $509/sqft | built 2015 | Similar size (4,128 vs 4,206 sqft); Similar lot size (12,479 vs 11,452 sqft); Same quality (Average)
    $2,100,000
  • 334 Ridge Ave, Winnetka, IL 60093
    4,597 sqft | $529/sqft | built 2005 | 9% larger (4,597 vs 4,206 sqft); Similar age (2005 vs 2007); Similar lot size (12,149 vs 11,452 sqft)
    $2,430,000
  • 222 Forest St, Winnetka, IL 60093
    4,291 sqft | $641/sqft | built 2009 | Similar size (4,291 vs 4,206 sqft); Similar age (2009 vs 2007); Lot 15% larger (13,200 vs 11,452 sqft)
    $2,750,000

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

Down 3.9% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$2,162,470−$87,530−3.9%
2025$2,250,000+$433,950+23.9%
2024$1,816,050$00.0%
2023$1,816,050−$143,950−7.3%
2022$1,960,000+$598,400+43.9%
2021$1,361,600$00.0%
2020$1,361,600——
6-year total+$800,870+58.8%