Cook County Value

501 Washington Ave, Wilmette, IL 60091

4 bed / 2 bath, 2,176 sqft, built 1909, in New Trier. Assessor market value for 2026: $1,120,470.

Cook County account 05342070080000

Assessor market value
$1,120,470
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,176 sqft
$515 per sqft
Year built
1909
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 10.6% from $1,254,000 in 2025 to $1,120,470 in 2026.
  • Assessor market value per square footThe current public record shows about $515 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

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

  • 523 Greenleaf Ave, Wilmette, IL 60091
    2,160 sqft | $556/sqft | built 1909 | Similar size (2,160 vs 2,176 sqft); Built same year (1909); Similar lot size (9,800 vs 9,000 sqft)
    $1,200,000
  • 800 Oakwood Ave, Wilmette, IL 60091
    2,168 sqft | $546/sqft | built 1910 | Similar size (2,168 vs 2,176 sqft); Similar age (1910 vs 1909); Similar lot size (9,450 vs 9,000 sqft)
    $1,183,020
  • 410 Washington Ave, Wilmette, IL 60091
    2,160 sqft | $434/sqft | built 1919 | Similar size (2,160 vs 2,176 sqft); Similar lot size (9,000 vs 9,000 sqft); Same quality (Average)
    $937,970
  • 922 Oakwood Ave, Wilmette, IL 60091
    2,162 sqft | $551/sqft | built 1914 | Similar size (2,162 vs 2,176 sqft); Similar age (1914 vs 1909); Similar lot size (9,500 vs 9,000 sqft)
    $1,191,060
  • 504 Maple Ave, Wilmette, IL 60091
    2,254 sqft | $421/sqft | built 1917 | Similar size (2,254 vs 2,176 sqft); Similar lot size (9,000 vs 9,000 sqft); Same quality (Average)
    $950,000

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: . Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Down 10.6% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,120,470−$133,530−10.6%
2025$1,254,000+$237,280+23.3%
2024$1,016,720−$83,280−7.6%
2023$1,100,000$00.0%
2022$1,100,000+$420,970+62.0%
2021$679,030$00.0%
2020$679,030——
6-year total+$441,440+65.0%