Cook County Value

818 Leyden Ln, Wilmette, IL 60091

4 bed / 3 bath, 2,590 sqft, built 1942, in New Trier. Assessor market value for 2026: $884,950.

Cook County account 05321180180000

Assessor market value
$884,950
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,590 sqft
$342 per sqft
Year built
1942
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 6.8% from $950,000 in 2025 to $884,950 in 2026.
  • Assessor market value per square footThe current public record shows about $342 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 1,944 residential records in the same neighborhood, the average assessor market value is about $372 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -2.2% on average.

Comparable assessments

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

  • 1732 Central Ave, Wilmette, IL 60091
    2,552 sqft | $426/sqft | built 1945 | Similar size (2,552 vs 2,590 sqft); Similar age (1945 vs 1942); Similar lot size (8,200 vs 8,400 sqft)
    $1,085,940
  • 819 Leyden Ln, Wilmette, IL 60091
    2,582 sqft | $391/sqft | built 1952 | Similar size (2,582 vs 2,590 sqft); Similar lot size (8,400 vs 8,400 sqft); Same quality (Average)
    $1,010,000
  • 825 Chilton Ln, Wilmette, IL 60091
    2,562 sqft | $340/sqft | built 1948 | Similar size (2,562 vs 2,590 sqft); Similar lot size (7,878 vs 8,400 sqft); Same quality (Average)
    $871,270
  • 806 Chilton Ln, Wilmette, IL 60091
    2,676 sqft | $334/sqft | built 1948 | Similar size (2,676 vs 2,590 sqft); Similar lot size (8,160 vs 8,400 sqft); Same quality (Average)
    $892,810
  • 848 Chilton Ln, Wilmette, IL 60091
    2,693 sqft | $319/sqft | built 1941 | Similar size (2,693 vs 2,590 sqft); Similar age (1941 vs 1942); Similar lot size (8,085 vs 8,400 sqft)
    $860,010

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 6.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$884,950−$65,050−6.8%
2025$950,000+$343,570+56.7%
2024$606,430−$35,120−5.5%
2023$641,550−$78,450−10.9%
2022$720,000+$101,730+16.5%
2021$618,270−$87,360−12.4%
2020$705,630——
6-year total+$179,320+25.4%