Cook County Value

428 9th St, Wilmette, IL 60091

3 bed / 2 bath, 3,032 sqft, built 1913, in New Trier. Assessor market value for 2026: $1,450,000.

Cook County account 05342190120000

Assessor market value
$1,450,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,032 sqft
$478 per sqft
Year built
1913
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 $1,450,000 in 2025 to $1,450,000 in 2026.
  • Assessor market value per square footThe current public record shows about $478 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

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

  • 509 Central Ave, Wilmette, IL 60091
    3,119 sqft | $494/sqft | built 1910 | Similar size (3,119 vs 3,032 sqft); Similar age (1910 vs 1913); Similar lot size (10,500 vs 10,500 sqft)
    $1,540,000
  • 819 Linden Ave, Wilmette, IL 60091
    3,020 sqft | $397/sqft | built 1914 | Similar size (3,020 vs 3,032 sqft); Similar age (1914 vs 1913); Similar lot size (9,500 vs 10,500 sqft)
    $1,200,000
  • 15 Crescent Pl, Wilmette, IL 60091
    2,903 sqft | $466/sqft | built 1916 | Similar size (2,903 vs 3,032 sqft); Similar age (1916 vs 1913); Similar lot size (10,766 vs 10,500 sqft)
    $1,353,200
  • 423 8th St, Wilmette, IL 60091
    2,996 sqft | $446/sqft | built 1916 | Similar size (2,996 vs 3,032 sqft); Similar age (1916 vs 1913); Similar lot size (10,500 vs 10,500 sqft)
    $1,336,220
  • 303 Greenleaf Ave, Wilmette, IL 60091
    3,127 sqft | $451/sqft | built 1914 | Similar size (3,127 vs 3,032 sqft); Similar age (1914 vs 1913); Similar lot size (10,192 vs 10,500 sqft)
    $1,410,000

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: . Showing the last prepared sales evidence while recent sales are refreshed. 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$1,450,000$00.0%
2025$1,450,000+$293,490+25.4%
2024$1,156,510−$50,630−4.2%
2023$1,207,140−$52,860−4.2%
2022$1,260,000+$308,290+32.4%
2021$951,710−$82,650−8.0%
2020$1,034,360——
6-year total+$415,640+40.2%