Cook County Value

1938 Washington Ave, Wilmette, IL 60091

5 bed / 3 bath, 2,656 sqft, built 1931, in New Trier. Assessor market value for 2026: $1,188,010.

Cook County account 05331100090000

Assessor market value
$1,188,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,656 sqft
$447 per sqft
Year built
1931
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 4.2% from $1,240,010 in 2025 to $1,188,010 in 2026.
  • Assessor market value per square footThe current public record shows about $447 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 1,671 residential records in the same neighborhood, the average assessor market value is about $458 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -2.4% on average.

Comparable assessments

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

  • 1324 Isabella St, Wilmette, IL 60091
    2,594 sqft | $463/sqft | built 1928 | Similar size (2,594 vs 2,656 sqft); Similar age (1928 vs 1931); Similar lot size (8,750 vs 8,850 sqft)
    $1,202,160
  • 1601 Central Ave, Wilmette, IL 60091
    2,650 sqft | $483/sqft | built 1925 | Similar size (2,650 vs 2,656 sqft); Similar lot size (9,535 vs 8,850 sqft); Same quality (Average)
    $1,280,000
  • 1628 Central Ave, Wilmette, IL 60091
    2,692 sqft | $410/sqft | built 1930 | Similar size (2,692 vs 2,656 sqft); Similar age (1930 vs 1931); Lot 12% smaller (7,800 vs 8,850 sqft)
    $1,102,500
  • 1626 Wilmette Ave, Wilmette, IL 60091
    2,806 sqft | $374/sqft | built 1924 | 6% larger (2,806 vs 2,656 sqft); Similar lot size (8,813 vs 8,850 sqft); Same quality (Average)
    $1,050,000
  • 1424 Maple Ave, Wilmette, IL 60091
    2,573 sqft | $466/sqft | built 1925 | Similar size (2,573 vs 2,656 sqft); Similar lot size (8,300 vs 8,850 sqft); Same quality (Average)
    $1,200,000

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 4.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,188,010−$52,000−4.2%
2025$1,240,010+$317,230+34.4%
2024$922,780$00.0%
2023$922,780−$87,230−8.6%
2022$1,010,010+$320,350+46.5%
2021$689,660$00.0%
2020$689,660——
6-year total+$498,350+72.3%