Cook County Value

422 9th St, Wilmette, IL 60091

4 bed / 3 bath, 3,444 sqft, built 2020, in New Trier. Assessor market value for 2026: $2,214,790.

Cook County account 05342190130000

Assessor market value
$2,214,790
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,444 sqft
$643 per sqft
Year built
2020
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 60091 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 7.3% from $2,390,000 in 2025 to $2,214,790 in 2026.
  • Assessor market value per square footThe current public record shows about $643 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 60091.
  • Neighborhood value signalAmong 807 residential records in the same neighborhood, the average assessor market value is about $481 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -2.6% on average.

Comparable assessments

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

  • 601 Lake Ave, Wilmette, IL 60091
    3,607 sqft | $610/sqft | built 2016 | Similar size (3,607 vs 3,444 sqft); Similar age (2016 vs 2020); Similar lot size (9,891 vs 10,500 sqft)
    $2,200,000
  • 430 9th St, Wilmette, IL 60091
    3,747 sqft | $635/sqft | built 2019 | 9% larger (3,747 vs 3,444 sqft); Similar age (2019 vs 2020); Similar lot size (10,500 vs 10,500 sqft)
    $2,380,000
  • 625 Greenleaf Ave, Wilmette, IL 60091
    3,427 sqft | $667/sqft | built 2008 | Similar size (3,427 vs 3,444 sqft); Similar lot size (9,800 vs 10,500 sqft); Same quality (Average)
    $2,285,940
  • 841 Oakwood Ave, Wilmette, IL 60091
    3,670 sqft | $582/sqft | built 2009 | 7% larger (3,670 vs 3,444 sqft); Similar lot size (10,425 vs 10,500 sqft); Same quality (Average)
    $2,135,720
  • 610 Linden Ave, Wilmette, IL 60091
    3,505 sqft | $612/sqft | built 2007 | Similar size (3,505 vs 3,444 sqft); Similar lot size (9,806 vs 10,500 sqft); Same quality (Average)
    $2,145,160

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

Down 7.3% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$2,214,790−$175,210−7.3%
2025$2,390,000+$632,380+36.0%
2024$1,757,620——
2-year total+$457,170+26.0%