Cook County Value

423 Prairie Ave, Wilmette, IL 60091

4 bed / 1 bath, 1,886 sqft, built 1925, in New Trier. Assessor market value for 2026: $843,650.

Cook County account 05341140110000

Possibly too high

about $14,000

8 similar homes nearby point to a value about $14,000 lower than yours.

Assessor market value$843,650
Similar homes$829,689
$13,961 gap · bars start at $0

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

Assessor market value
$843,650
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,886 sqft
$447 per sqft
Year built
1925
Average quality

Why we think so

Similar homes' assessments

Moderate

6 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $436.12/sqft, but land is valued apart from the home, and some of them have less land value per square foot of home than yours, which counts as $143,000. Counting your land in place of theirs where theirs is less, they support a value of $829,689.

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 7.3% from $910,000 in 2025 to $843,650 in 2026.
  • Assessor market value per square footThe current public record shows about $447 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.

  • 425 Prairie Ave, Wilmette, IL 60091
    1,852 sqft | $448/sqft | built 1925 | Similar size (1,852 vs 1,886 sqft); Built same year (1925); Similar lot size (4,400 vs 4,400 sqft)
    $830,000
  • 332 Oak Cir, Wilmette, IL 60091
    1,949 sqft | $436/sqft | built 1924 | Similar size (1,949 vs 1,886 sqft); Similar age (1924 vs 1925); Similar lot size (4,319 vs 4,400 sqft)
    $850,000
  • 344 Oak Cir, Wilmette, IL 60091
    1,820 sqft | $401/sqft | built 1923 | Similar size (1,820 vs 1,886 sqft); Similar age (1923 vs 1925); Similar lot size (4,108 vs 4,400 sqft)
    $730,000
  • 350 Oak Cir, Wilmette, IL 60091
    1,910 sqft | $390/sqft | built 1925 | Similar size (1,910 vs 1,886 sqft); Built same year (1925); Lot 14% smaller (3,800 vs 4,400 sqft)
    $744,420
  • 101 15th St, Wilmette, IL 60091
    1,838 sqft | $396/sqft | built 1938 | Similar size (1,838 vs 1,886 sqft); Similar lot size (4,296 vs 4,400 sqft); Same quality (Average)
    $727,600

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 7.3% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$843,650−$66,350−7.3%
2025$910,000+$280,000+44.4%
2024$630,000$00.0%
2023$630,000$00.0%
2022$630,000+$64,860+11.5%
2021$565,140+$100.0%
2020$565,130——
6-year total+$278,520+49.3%