Cook County Value

1520 Gregory Ave, Wilmette, IL 60091

4 bed / 2 bath, 3,375 sqft, built 1994, in New Trier. Assessor market value for 2026: $1,553,280.

Cook County account 05334060190000

Assessor market value
$1,553,280
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,375 sqft
$460 per sqft
Year built
1994
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 8.1% from $1,690,000 in 2025 to $1,553,280 in 2026.
  • Assessor market value per square footThe current public record shows about $460 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

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

  • 2020 Birchwood Ave, Wilmette, IL 60091
    3,382 sqft | $391/sqft | built 1996 | Similar size (3,382 vs 3,375 sqft); Similar age (1996 vs 1994); Similar lot size (8,850 vs 9,100 sqft)
    $1,321,510
  • 719 Harvard St, Wilmette, IL 60091
    3,450 sqft | $371/sqft | built 1989 | Similar size (3,450 vs 3,375 sqft); Similar age (1989 vs 1994); Similar lot size (9,250 vs 9,100 sqft)
    $1,280,010
  • 2004 Birchwood Ave, Wilmette, IL 60091
    3,254 sqft | $418/sqft | built 1994 | Similar size (3,254 vs 3,375 sqft); Built same year (1994); Similar lot size (8,850 vs 9,100 sqft)
    $1,360,010
  • 716 20th St, Wilmette, IL 60091
    3,370 sqft | $451/sqft | built 2000 | Similar size (3,370 vs 3,375 sqft); Similar lot size (8,400 vs 9,100 sqft); Same quality (Average)
    $1,520,000
  • 1410 Gregory Ave, Wilmette, IL 60091
    3,381 sqft | $544/sqft | built 2002 | Similar size (3,381 vs 3,375 sqft); Similar lot size (8,550 vs 9,100 sqft); Same quality (Average)
    $1,839,230

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 8.1% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,553,280−$136,720−8.1%
2025$1,690,000+$540,000+47.0%
2024$1,150,000——
2-year total+$403,280+35.1%