Cook County Value

641 Lamon Ave, Wilmette, IL 60091

4 bed / 2 bath, 1,934 sqft, built 1959, in New Trier. Assessor market value for 2026: $591,060.

Cook County account 05312190450000

In line with similar homes

8 similar homes nearby support a value at or above your county value.

Assessor market value$591,060
Similar homes$624,198
No gap: similar homes are at or above the county value · bars start at $0

How sure: High · 8 similar homes (5 shown below) · public records only

Assessor market value
$591,060
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,934 sqft
$306 per sqft
Year built
1959
Average quality

What we found

Similar homes' assessments

Weak

2 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $322.75/sqft, which supports a value of $624,198.

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 4.7% from $620,000 in 2025 to $591,060 in 2026.
  • Assessor market value per square footThe current public record shows about $306 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.

  • 3017 Greenleaf Ave, Wilmette, IL 60091
    1,890 sqft | $323/sqft | built 1961 | Similar size (1,890 vs 1,934 sqft); Similar age (1961 vs 1959); Similar lot size (8,156 vs 7,920 sqft)
    $610,000
  • 634 Laporte Ave, Wilmette, IL 60091
    1,835 sqft | $305/sqft | built 1958 | 5% smaller (1,835 vs 1,934 sqft); Similar age (1958 vs 1959); Similar lot size (7,920 vs 7,920 sqft)
    $560,000
  • 614 Laporte Ave, Wilmette, IL 60091
    1,835 sqft | $305/sqft | built 1958 | 5% smaller (1,835 vs 1,934 sqft); Similar age (1958 vs 1959); Similar lot size (7,920 vs 7,920 sqft)
    $560,000
  • 236 Hibbard Rd, Wilmette, IL 60091
    1,865 sqft | $360/sqft | built 1956 | Similar size (1,865 vs 1,934 sqft); Similar age (1956 vs 1959); Similar lot size (7,838 vs 7,920 sqft)
    $672,240
  • 3017 Hill St, Wilmette, IL 60091
    1,908 sqft | $333/sqft | built 1956 | Similar size (1,908 vs 1,934 sqft); Similar age (1956 vs 1959); Similar lot size (7,500 vs 7,920 sqft)
    $635,220

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 4.7% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$591,060−$28,940−4.7%
2025$620,000+$172,740+38.6%
2024$447,260——
2-year total+$143,800+32.2%