Cook County Value

1517 Gregory Ave, Wilmette, IL 60091

6 bed / 5 bath, 2,302 sqft, built 2025, in New Trier Assessor market value for 2026: $1,750,010.

Cook County account 05334080150000

Likely too high

about $346,000

8 similar homes nearby point to a value about $346,000 lower than yours.

Assessor market value$1,750,010
Similar homes$1,404,266
$345,744 gap · bars start at $0

How sure: High · 8 similar homes (5 shown below) · public records only

Assessor market value
$1,750,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,302 sqft
$760 per sqft
Year built
2025
Average quality

Why we think so

Similar homes' assessments

Strong

8 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $610.02/sqft, which supports a value of $1,404,266.

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 changed from $650,010 in 2025 to $1,750,010 in 2026. A change this large often reflects new construction, a reclassification or a record correction, so check it against the county record.
  • Assessor market value per square footThe current public record shows about $760 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.

  • 123 Prairie Ave, Wilmette, IL 60091
    2,295 sqft | $645/sqft | built 2015 | Similar size (2,295 vs 2,302 sqft); Similar lot size (5,000 vs 4,550 sqft); Same quality (Average)
    $1,480,000
  • 135 Central Park Ave, Wilmette, IL 60091
    2,572 sqft | $363/sqft | built 2023 | 12% larger (2,572 vs 2,302 sqft); Similar age (2023 vs 2025); Similar lot size (4,290 vs 4,550 sqft)
    $934,720
  • 1513 Maple Ave, Wilmette, IL 60091
    2,326 sqft | $666/sqft | built 2023 | Similar size (2,326 vs 2,302 sqft); Similar age (2023 vs 2025); Same quality (Average)
    $1,550,000
  • 120 16th St, Wilmette, IL 60091
    2,544 sqft | $641/sqft | built 2019 | 10% larger (2,544 vs 2,302 sqft); Similar lot size (5,000 vs 4,550 sqft); Same quality (Average)
    $1,630,000
  • 413 Park Ave, Wilmette, IL 60091
    2,479 sqft | $610/sqft | built 2023 | 8% larger (2,479 vs 2,302 sqft); Similar age (2023 vs 2025); Lot 17% larger (5,333 vs 4,550 sqft)
    $1,512,230

Recent comparable sales

No usable comparable sales are available in this data snapshot.

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

Up 169.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,750,010+$1,100,000+169.2%
2025$650,010+$90,000+16.1%
2024$560,010$00.0%
2023$560,010$00.0%
2022$560,010+$228,000+68.7%
2021$332,010$00.0%
2020$332,010——
6-year total+$1,418,000+427.1%