Cook County Value

1638 Walnut Ave, Wilmette, IL 60091

4 bed / 3 bath, 2,724 sqft, built 1999, in New Trier. Assessor market value for 2026: $1,485,760.

Cook County account 05284140140000

Assessor market value
$1,485,760
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,724 sqft
$545 per sqft
Year built
1999
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 5.4% from $1,570,000 in 2025 to $1,485,760 in 2026.
  • Assessor market value per square footThe current public record shows about $545 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 1,584 residential records in the same neighborhood, the average assessor market value is about $440 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.9% on average.

Comparable assessments

Showing 5 of the 8 similar homes in this property's equity comparison, from public appraisal records.

  • 1518 Walnut Ave, Wilmette, IL 60091
    2,728 sqft | $510/sqft | built 1998 | Similar size (2,728 vs 2,724 sqft); Similar age (1998 vs 1999); Similar lot size (7,000 vs 7,000 sqft)
    $1,390,000
  • 1416 Elmwood Ave, Wilmette, IL 60091
    2,664 sqft | $432/sqft | built 1997 | Similar size (2,664 vs 2,724 sqft); Similar age (1997 vs 1999); Similar lot size (7,000 vs 7,000 sqft)
    $1,150,000
  • 2331 Greenwood Ave, Wilmette, IL 60091
    2,752 sqft | $581/sqft | built 2003 | Similar size (2,752 vs 2,724 sqft); Similar age (2003 vs 1999); Similar lot size (7,200 vs 7,000 sqft)
    $1,600,000
  • 1701 Elmwood Ave, Wilmette, IL 60091
    2,652 sqft | $560/sqft | built 2005 | Similar size (2,652 vs 2,724 sqft); Similar lot size (7,000 vs 7,000 sqft); Same quality (Average)
    $1,486,090
  • 1225 Hunter Rd, Wilmette, IL 60091
    2,745 sqft | $473/sqft | built 2000 | Similar size (2,745 vs 2,724 sqft); Similar age (2000 vs 1999); Similar lot size (6,600 vs 7,000 sqft)
    $1,297,670

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 5.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,485,760−$84,240−5.4%
2025$1,570,000+$586,820+59.7%
2024$983,180——
2-year total+$502,580+51.1%