Cook County Value

623 Greenleaf Ave, Wilmette, IL 60091

5 bed / 4 bath, 3,763 sqft, built 1924, in New Trier. Assessor market value for 2026: $1,800,370.

Cook County account 05342160040000

Assessor market value
$1,800,370
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,763 sqft
$478 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 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 3.2% from $1,860,000 in 2025 to $1,800,370 in 2026.
  • Assessor market value per square footThe current public record shows about $478 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.

  • 231 Greenleaf Ave, Wilmette, IL 60091
    3,678 sqft | $367/sqft | built 1926 | Similar size (3,678 vs 3,763 sqft); Similar age (1926 vs 1924); Similar lot size (9,800 vs 9,800 sqft)
    $1,350,000
  • 311 Driftwood Ln, Wilmette, IL 60091
    3,791 sqft | $420/sqft | built 1923 | Similar size (3,791 vs 3,763 sqft); Similar age (1923 vs 1924); Similar lot size (9,160 vs 9,800 sqft)
    $1,592,020
  • 317 Greenleaf Ave, Wilmette, IL 60091
    3,818 sqft | $393/sqft | built 1919 | Similar size (3,818 vs 3,763 sqft); Similar age (1919 vs 1924); Similar lot size (9,800 vs 9,800 sqft)
    $1,500,000
  • 923 Greenleaf Ave, Wilmette, IL 60091
    3,878 sqft | $418/sqft | built 1916 | Similar size (3,878 vs 3,763 sqft); Similar lot size (9,650 vs 9,800 sqft); Same quality (Average)
    $1,619,350
  • 347 Washington Ave, Wilmette, IL 60091
    3,721 sqft | $451/sqft | built 1920 | Similar size (3,721 vs 3,763 sqft); Similar age (1920 vs 1924); Similar lot size (9,900 vs 9,800 sqft)
    $1,679,920

Recent comparable sales

Sales selected by similarity to the subject property.

  • 108 17th St, Wilmette, IL 60091
    June-29-2026 | 3,493 sqft | $417/sqft | built 1941 | 7% size difference (3,493 sqft); Sold after the valuation date; Within 1 bedroom (4 vs 5)
    $1,457,000
  • 230 Greenleaf Ave, Wilmette, IL 60091
    3,489 sqft | $682/sqft | built 1925 | 7% size difference (3,489 sqft); Similar age (1925); Same beds (5)
    $2,380,000
  • 533 Maple Ave, Wilmette, IL 60091
    3,584 sqft | $307/sqft | built 1931 | Similar size (3,584 sqft); Moderate age difference (7 years newer); Within 1 bedroom (6 vs 5)
    $1,100,000

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 3.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,800,370−$59,630−3.2%
2025$1,860,000+$619,590+50.0%
2024$1,240,410−$287,340−18.8%
2023$1,527,750$00.0%
2022$1,527,750+$718,000+88.7%
2021$809,750+$83,080+11.4%
2020$726,670——
6-year total+$1,073,700+147.8%