Cook County Value

815 Gregory Ave, Wilmette, IL 60091

4 bed / 2 bath, 2,424 sqft, built 1913, in New Trier. Assessor market value for 2026: $1,181,000.

Cook County account 05344090080000

Assessor market value
$1,181,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,424 sqft
$487 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 decreased 2.4% from $1,210,000 in 2025 to $1,181,000 in 2026.
  • Assessor market value per square footThe current public record shows about $487 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.

  • 108 9th St, Wilmette, IL 60091
    2,502 sqft | $388/sqft | built 1914 | Similar size (2,502 vs 2,424 sqft); Similar age (1914 vs 1913); Similar lot size (9,653 vs 9,600 sqft)
    $970,760
  • 1462 Wilmette Ave, Wilmette, IL 60091
    2,380 sqft | $319/sqft | built 1911 | Similar size (2,380 vs 2,424 sqft); Similar age (1911 vs 1913); Similar lot size (9,381 vs 9,600 sqft)
    $760,000
  • 1011 Greenleaf Ave, Wilmette, IL 60091
    2,485 sqft | $453/sqft | built 1918 | Similar size (2,485 vs 2,424 sqft); Similar age (1918 vs 1913); Similar lot size (9,650 vs 9,600 sqft)
    $1,126,230
  • 1054 Linden Ave, Wilmette, IL 60091
    2,400 sqft | $494/sqft | built 1908 | Similar size (2,400 vs 2,424 sqft); Similar age (1908 vs 1913); Similar lot size (10,000 vs 9,600 sqft)
    $1,185,160
  • 731 Prairie Ave, Wilmette, IL 60091
    2,388 sqft | $511/sqft | built 1911 | Similar size (2,388 vs 2,424 sqft); Similar age (1911 vs 1913); Similar lot size (10,000 vs 9,600 sqft)
    $1,220,000

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

Down 2.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,181,000−$29,000−2.4%
2025$1,210,000+$260,000+27.4%
2024$950,000$00.0%
2023$950,000$00.0%
2022$950,000+$266,850+39.1%
2021$683,150+$100.0%
2020$683,140——
6-year total+$497,860+72.9%