Cook County Value

502 Washington Ave, Wilmette, IL 60091

4 bed / 3 bath, 3,137 sqft, built 1899, in New Trier. Assessor market value for 2026: $1,550,750.

Cook County account 05342040130000

Likely too high

about $68,000

8 similar homes nearby point to a value about $68,000 lower than yours.

Assessor market value$1,550,750
Similar homes$1,482,985
$67,765 gap · bars start at $0

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

Assessor market value
$1,550,750
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,137 sqft
$494 per sqft
Year built
1899
Average quality

Why we think so

Similar homes' assessments

Strong

6 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $467.11/sqft, but land is valued apart from the home, and some of them have less land value per square foot of home than yours, which counts as $292,500. Counting your land in place of theirs where theirs is less, they support a value of $1,482,985.

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 10.0% from $1,722,970 in 2025 to $1,550,750 in 2026.
  • Assessor market value per square footThe current public record shows about $494 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.

  • 725 Washington Ave, Wilmette, IL 60091
    3,052 sqft | $495/sqft | built 1899 | Similar size (3,052 vs 3,137 sqft); Built same year (1899); Similar lot size (9,000 vs 9,000 sqft)
    $1,510,000
  • 115 Laurel Ave, Wilmette, IL 60091
    3,298 sqft | $415/sqft | built 1900 | 5% larger (3,298 vs 3,137 sqft); Similar age (1900 vs 1899); Similar lot size (8,960 vs 9,000 sqft)
    $1,370,000
  • 710 Greenleaf Ave, Wilmette, IL 60091
    3,242 sqft | $443/sqft | built 1903 | Similar size (3,242 vs 3,137 sqft); Similar age (1903 vs 1899); Similar lot size (9,200 vs 9,000 sqft)
    $1,435,320
  • 701 Washington Ave, Wilmette, IL 60091
    3,099 sqft | $477/sqft | built 1905 | Similar size (3,099 vs 3,137 sqft); Similar lot size (9,000 vs 9,000 sqft); Same quality (Average)
    $1,477,870
  • 627 Lake Ave, Wilmette, IL 60091
    3,126 sqft | $467/sqft | built 1901 | Similar size (3,126 vs 3,137 sqft); Similar age (1901 vs 1899); Similar lot size (8,427 vs 9,000 sqft)
    $1,460,200

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 10.0% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,550,750−$172,220−10.0%
2025$1,722,970+$485,120+39.2%
2024$1,237,850$00.0%
2023$1,237,850−$102,150−7.6%
2022$1,340,000+$347,720+35.0%
2021$992,280+$100.0%
2020$992,270——
6-year total+$558,480+56.3%