Cook County Value

1431 Gregory Ave, Wilmette, IL 60091

5 bed / 2 bath, 3,832 sqft, built 1924, in New Trier. Assessor market value for 2026: $1,511,990.

Cook County account 05334090010000

Assessor market value
$1,511,990
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,832 sqft
$395 per sqft
Year built
1924
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 13.6% from $1,750,010 in 2025 to $1,511,990 in 2026.
  • Assessor market value per square footThe current public record shows about $395 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.

  • 819 16th St, Wilmette, IL 60091
    3,656 sqft | $413/sqft | built 1926 | Similar size (3,656 vs 3,832 sqft); Similar age (1926 vs 1924); Similar lot size (10,340 vs 10,938 sqft)
    $1,510,000
  • 1601 Washington Ave, Wilmette, IL 60091
    3,843 sqft | $421/sqft | built 1937 | Similar size (3,843 vs 3,832 sqft); Similar lot size (12,000 vs 10,938 sqft); Same quality (Average)
    $1,618,220
  • 1220 Maple Ave, Wilmette, IL 60091
    3,810 sqft | $475/sqft | built 1933 | Similar size (3,810 vs 3,832 sqft); Lot 18% smaller (9,020 vs 10,938 sqft); Same quality (Average)
    $1,810,000
  • 634 Prairie Ave, Wilmette, IL 60091
    3,920 sqft | $389/sqft | built 1916 | Similar size (3,920 vs 3,832 sqft); Lot 18% smaller (8,970 vs 10,938 sqft); Same quality (Average)
    $1,523,730
  • 1024 Central Ave, Wilmette, IL 60091
    3,320 sqft | $440/sqft | built 1912 | 13% smaller (3,320 vs 3,832 sqft); Similar lot size (10,800 vs 10,938 sqft); Same quality (Average)
    $1,460,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 230 Greenleaf Ave, Wilmette, IL 60091
    3,489 sqft | $682/sqft | built 1925 | 9% size difference (3,489 sqft); Similar age (1925); Same beds (5)
    $2,380,000
  • 108 17th St, Wilmette, IL 60091
    June-29-2026 | 3,493 sqft | $417/sqft | built 1941 | 9% size difference (3,493 sqft); Sold after the valuation date; Within 1 bedroom (4 vs 5)
    $1,457,000
  • 533 Maple Ave, Wilmette, IL 60091
    3,584 sqft | $307/sqft | built 1931 | 6% size difference (3,584 sqft); Moderate age difference (7 years newer); Within 1 bedroom (6 vs 5)
    $1,100,000

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

Down 13.6% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,511,990−$238,020−13.6%
2025$1,750,010+$622,260+55.2%
2024$1,127,750$00.0%
2023$1,127,750−$92,260−7.6%
2022$1,220,010+$124,690+11.4%
2021$1,095,320+$100.0%
2020$1,095,310——
6-year total+$416,680+38.0%