Cook County Value

823 Chestnut Ave, Wilmette, IL 60091

5 bed / 4 bath, 4,902 sqft, built 1926, in New Trier. Assessor market value for 2026: $2,400,000.

Cook County account 05274020030000

Assessor market value
$2,400,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
4,902 sqft
$490 per sqft
Year built
1926
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 stayed about the same, from $2,400,000 in 2025 to $2,400,000 in 2026.
  • Assessor market value per square footThe current public record shows about $490 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 809 residential records in the same neighborhood, the average assessor market value is about $540 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.4% on average.

Comparable assessments

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

  • 703 Greenwood Ave, Wilmette, IL 60091
    5,170 sqft | $472/sqft | built 1920 | 6% larger (5,170 vs 4,902 sqft); Similar lot size (14,992 vs 14,800 sqft); Same quality (Average)
    $2,438,400
  • 1136 Ashland Ave, Wilmette, IL 60091
    4,900 sqft | $461/sqft | built 1924 | Similar size (4,900 vs 4,902 sqft); Similar age (1924 vs 1926); Lot 11% smaller (13,200 vs 14,800 sqft)
    $2,256,700
  • 616 Lake Ave, Wilmette, IL 60091
    4,975 sqft | $444/sqft | built 1913 | Similar size (4,975 vs 4,902 sqft); Similar lot size (14,625 vs 14,800 sqft); Same quality (Average)
    $2,210,000
  • 714 Forest Ave, Wilmette, IL 60091
    4,531 sqft | $490/sqft | built 1926 | 8% smaller (4,531 vs 4,902 sqft); Built same year (1926); Similar lot size (13,875 vs 14,800 sqft)
    $2,221,880
  • 1241 Greenwood Ave, Wilmette, IL 60091
    5,193 sqft | $482/sqft | built 1929 | 6% larger (5,193 vs 4,902 sqft); Similar age (1929 vs 1926); Similar lot size (13,950 vs 14,800 sqft)
    $2,501,500

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

No change in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$2,400,000$00.0%
2025$2,400,000+$700,000+41.2%
2024$1,700,000$00.0%
2023$1,700,000−$160,000−8.6%
2022$1,860,000+$537,900+40.7%
2021$1,322,100$00.0%
2020$1,322,100——
6-year total+$1,077,900+81.5%