Cook County Value

801 15th St, Wilmette, IL 60091

4 bed / 2 bath, 2,704 sqft, built 1910, in New Trier. Assessor market value for 2026: $1,169,330.

Cook County account 05332020310000

Assessor market value
$1,169,330
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,704 sqft
$432 per sqft
Year built
1910
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 decreased 4.7% from $1,226,740 in 2025 to $1,169,330 in 2026.
  • Assessor market value per square footThe current public record shows about $432 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 1,671 residential records in the same neighborhood, the average assessor market value is about $458 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -2.4% on average.

Comparable assessments

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

  • 1303 Maple Ave, Wilmette, IL 60091
    2,644 sqft | $462/sqft | built 1910 | Similar size (2,644 vs 2,704 sqft); Built same year (1910); Similar lot size (7,500 vs 7,500 sqft)
    $1,222,030
  • 1005 Greenleaf Ave, Wilmette, IL 60091
    2,616 sqft | $412/sqft | built 1908 | Similar size (2,616 vs 2,704 sqft); Similar age (1908 vs 1910); Similar lot size (7,350 vs 7,500 sqft)
    $1,078,880
  • 1535 Spencer Ave, Wilmette, IL 60091
    2,750 sqft | $450/sqft | built 1917 | Similar size (2,750 vs 2,704 sqft); Similar lot size (7,500 vs 7,500 sqft); Same quality (Average)
    $1,237,460
  • 112 6th St, Wilmette, IL 60091
    2,705 sqft | $469/sqft | built 1919 | Similar size (2,705 vs 2,704 sqft); Similar lot size (7,500 vs 7,500 sqft); Same quality (Average)
    $1,269,490
  • 1531 Spencer Ave, Wilmette, IL 60091
    2,633 sqft | $467/sqft | built 1918 | Similar size (2,633 vs 2,704 sqft); Similar lot size (7,500 vs 7,500 sqft); Same quality (Average)
    $1,229,020

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$1,169,330−$57,410−4.7%
2025$1,226,740+$303,390+32.9%
2024$923,350−$86,650−8.6%
2023$1,010,000$00.0%
2022$1,010,000+$363,540+56.2%
2021$646,460−$49,800−7.2%
2020$696,260——
6-year total+$473,070+67.9%