Cook County Value

621 Prairie Ave, Wilmette, IL 60091

3 bed / 2 bath, 1,416 sqft, built 1923, in New Trier. Assessor market value for 2026: $559,760.

Cook County account 05332180290000

Assessor market value
$559,760
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,416 sqft
$395 per sqft
Year built
1923
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 15.2% from $660,000 in 2025 to $559,760 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

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

  • 1409 Maple Ave, Wilmette, IL 60091
    1,394 sqft | $502/sqft | built 1920 | Similar size (1,394 vs 1,416 sqft); Similar age (1920 vs 1923); Similar lot size (4,275 vs 4,200 sqft)
    $700,000
  • 134 Central Park Ave, Wilmette, IL 60091
    1,422 sqft | $416/sqft | built 1926 | Similar size (1,422 vs 1,416 sqft); Similar age (1926 vs 1923); Similar lot size (4,422 vs 4,200 sqft)
    $591,650
  • 235 Central Park Ave, Wilmette, IL 60091
    1,364 sqft | $535/sqft | built 1927 | Similar size (1,364 vs 1,416 sqft); Similar age (1927 vs 1923); Similar lot size (4,290 vs 4,200 sqft)
    $730,010
  • 1018 Isabella St, Wilmette, IL 60091
    1,361 sqft | $411/sqft | built 1925 | Similar size (1,361 vs 1,416 sqft); Similar age (1925 vs 1923); Similar lot size (4,352 vs 4,200 sqft)
    $559,270
  • 316 15th St, Wilmette, IL 60091
    1,360 sqft | $425/sqft | built 1914 | Similar size (1,360 vs 1,416 sqft); Similar lot size (4,250 vs 4,200 sqft); Same quality (Average)
    $577,950

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 15.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$559,760−$100,240−15.2%
2025$660,000+$211,490+47.2%
2024$448,510$00.0%
2023$448,510−$121,490−21.3%
2022$570,000+$234,860+70.1%
2021$335,140+$100.0%
2020$335,130——
6-year total+$224,630+67.0%