Cook County Value

823 Ashland Ave, Wilmette, IL 60091

6 bed / 3 bath, 4,452 sqft, built 1917, in New Trier. Assessor market value for 2026: $2,133,660.

Cook County account 05274060030000

Assessor market value
$2,133,660
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
4,452 sqft
$479 per sqft
Year built
1917
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 $2,133,660 in 2025 to $2,133,660 in 2026.
  • Assessor market value per square footThe current public record shows about $479 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

Similar public appraisal records selected for this property's equity comparison.

  • 1037 Ashland Ave, Wilmette, IL 60091
    4,278 sqft | $493/sqft | built 1912 | Similar size (4,278 vs 4,452 sqft); Similar age (1912 vs 1917); Similar lot size (11,968 vs 12,090 sqft)
    $2,110,000
  • 701 Elmwood Ave, Wilmette, IL 60091
    4,741 sqft | $427/sqft | built 1915 | 6% larger (4,741 vs 4,452 sqft); Similar age (1915 vs 1917); Similar lot size (11,640 vs 12,090 sqft)
    $2,023,430
  • 803 Chestnut Ave, Wilmette, IL 60091
    4,443 sqft | $485/sqft | built 1923 | Similar size (4,443 vs 4,452 sqft); Similar lot size (12,740 vs 12,090 sqft); Same quality (Average)
    $2,155,710
  • 928 Ashland Ave, Wilmette, IL 60091
    4,465 sqft | $477/sqft | built 1913 | Similar size (4,465 vs 4,452 sqft); Similar age (1913 vs 1917); Similar lot size (11,160 vs 12,090 sqft)
    $2,130,000
  • 714 Elmwood Ave, Wilmette, IL 60091
    4,358 sqft | $482/sqft | built 1913 | Similar size (4,358 vs 4,452 sqft); Similar age (1913 vs 1917); Lot 13% smaller (10,560 vs 12,090 sqft)
    $2,100,000

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$2,133,660$00.0%
2025$2,133,660+$667,690+45.5%
2024$1,465,970$00.0%
2023$1,465,970−$116,770−7.4%
2022$1,582,740+$524,740+49.6%
2021$1,058,000$00.0%
2020$1,058,000——
6-year total+$1,075,660+101.7%