Cook County Value

339 Lamon Ave, Wilmette, IL 60091

3 bed / 2 bath, 1,222 sqft, built 1960, in New Trier Assessor market value for 2026: $479,700.

Cook County account 05314080930000

Assessor market value
$479,700
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,222 sqft
$393 per sqft
Year built
1960
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 7.8% from $520,000 in 2025 to $479,700 in 2026.
  • Assessor market value per square footThe current public record shows about $393 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 1,109 residential records in the same neighborhood, the average assessor market value is about $311 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -2.1% on average.

Comparable assessments

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

  • 2924 Central Ave, Wilmette, IL 60091
    1,215 sqft | $412/sqft | built 1959 | Similar size (1,215 vs 1,222 sqft); Similar age (1959 vs 1960); Similar lot size (8,300 vs 8,450 sqft)
    $500,000
  • 3044 Barclay Ln, Wilmette, IL 60091
    1,215 sqft | $379/sqft | built 1956 | Similar size (1,215 vs 1,222 sqft); Similar age (1956 vs 1960); Similar lot size (8,483 vs 8,450 sqft)
    $460,000
  • 2928 Central Ave, Wilmette, IL 60091
    1,215 sqft | $420/sqft | built 1956 | Similar size (1,215 vs 1,222 sqft); Similar age (1956 vs 1960); Similar lot size (8,300 vs 8,450 sqft)
    $510,000
  • 3016 Central Ave, Wilmette, IL 60091
    1,215 sqft | $346/sqft | built 1958 | Similar size (1,215 vs 1,222 sqft); Similar age (1958 vs 1960); Similar lot size (7,929 vs 8,450 sqft)
    $420,000
  • 748 Lawler Ave, Wilmette, IL 60091
    1,233 sqft | $349/sqft | built 1957 | Similar size (1,233 vs 1,222 sqft); Similar age (1957 vs 1960); Similar lot size (7,920 vs 8,450 sqft)
    $430,440

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 7.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$479,700−$40,300−7.8%
2025$520,000+$118,860+29.6%
2024$401,140——
2-year total+$78,560+19.6%