Cook County Value

612 Ouilmette Ln, Wilmette, IL 60091

4 bed / 2 bath, 2,084 sqft, built 1950, in New Trier. Assessor market value for 2026: $743,230.

Cook County account 05331070500000

Assessor market value
$743,230
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,084 sqft
$357 per sqft
Year built
1950
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 10.5% from $830,000 in 2025 to $743,230 in 2026.
  • Assessor market value per square footThe current public record shows about $357 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.

  • 621 Ouilmette Ln, Wilmette, IL 60091
    2,065 sqft | $358/sqft | built 1952 | Similar size (2,065 vs 2,084 sqft); Similar age (1952 vs 1950); Similar lot size (6,780 vs 6,780 sqft)
    $740,000
  • 607 Ouilmette Ln, Wilmette, IL 60091
    2,025 sqft | $370/sqft | built 1950 | Similar size (2,025 vs 2,084 sqft); Built same year (1950); Similar lot size (6,780 vs 6,780 sqft)
    $750,000
  • 717 Ouilmette Ln, Wilmette, IL 60091
    2,236 sqft | $315/sqft | built 1949 | 7% larger (2,236 vs 2,084 sqft); Similar age (1949 vs 1950); Similar lot size (6,720 vs 6,780 sqft)
    $705,000
  • 1522 Highland Ave, Wilmette, IL 60091
    2,109 sqft | $413/sqft | built 1950 | Similar size (2,109 vs 2,084 sqft); Built same year (1950); Lot 14% larger (7,750 vs 6,780 sqft)
    $870,030
  • 812 Isabella St, Wilmette, IL 60091
    2,134 sqft | $462/sqft | built 1943 | Similar size (2,134 vs 2,084 sqft); Similar lot size (7,200 vs 6,780 sqft); Same quality (Average)
    $986,170

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 10.5% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$743,230−$86,770−10.5%
2025$830,000+$160,000+23.9%
2024$670,000$00.0%
2023$670,000$00.0%
2022$670,000+$215,850+47.5%
2021$454,150+$6,910+1.5%
2020$447,240——
6-year total+$295,990+66.2%