Cook County Value

231 17th St, Wilmette, IL 60091

4 bed / 3 bath, 2,902 sqft, built 1927, in New Trier. Assessor market value for 2026: $1,107,410.

Cook County account 05334010600000

In line with similar homes

8 similar homes nearby support a value at or above your county value.

Assessor market value$1,107,410
Similar homes$1,133,260
No gap: similar homes are at or above the county value · bars start at $0

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

Assessor market value
$1,107,410
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,902 sqft
$382 per sqft
Year built
1927
Average quality

What we found

Similar homes' assessments

Weak

2 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $390.51/sqft, which supports a value of $1,133,260.

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 18.0% from $1,350,000 in 2025 to $1,107,410 in 2026.
  • Assessor market value per square footThe current public record shows about $382 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 1,944 residential records in the same neighborhood, the average assessor market value is about $372 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -2.2% on average.

Comparable assessments

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

  • 2037 Highland Ave, Wilmette, IL 60091
    2,784 sqft | $417/sqft | built 1929 | Similar size (2,784 vs 2,902 sqft); Similar age (1929 vs 1927); Similar lot size (6,600 vs 6,792 sqft)
    $1,160,000
  • 1769 Washington Ave, Wilmette, IL 60091
    2,866 sqft | $380/sqft | built 1922 | Similar size (2,866 vs 2,902 sqft); Similar age (1922 vs 1927); Lot 11% larger (7,520 vs 6,792 sqft)
    $1,089,940
  • 1701 Highland Ave, Wilmette, IL 60091
    2,724 sqft | $391/sqft | built 1925 | 6% smaller (2,724 vs 2,902 sqft); Similar age (1925 vs 1927); Similar lot size (6,552 vs 6,792 sqft)
    $1,063,750
  • 211 17th St, Wilmette, IL 60091
    2,789 sqft | $384/sqft | built 1924 | Similar size (2,789 vs 2,902 sqft); Similar age (1924 vs 1927); Similar lot size (6,400 vs 6,792 sqft)
    $1,070,390
  • 1710 Central Ave, Wilmette, IL 60091
    2,970 sqft | $502/sqft | built 1927 | Similar size (2,970 vs 2,902 sqft); Built same year (1927); Lot 15% larger (7,800 vs 6,792 sqft)
    $1,490,000

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 18.0% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,107,410−$242,590−18.0%
2025$1,350,000+$529,440+64.5%
2024$820,560−$71,680−8.0%
2023$892,240−$137,760−13.4%
2022$1,030,000+$298,870+40.9%
2021$731,130$00.0%
2020$731,130——
6-year total+$376,280+51.5%