Cook County Value

421 Warwick Ln Kenilworth, IL 60043

6 bed / 6 bath, 6,377 sqft, built 2021, in New Trier. Assessor market value for 2026: $3,990,000.

Cook County account 05271000390000

Assessor market value
$3,990,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
6,377 sqft
$626 per sqft
Year built
2021
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 60043 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 stayed about the same, from $3,990,000 in 2025 to $3,990,000 in 2026.
  • Assessor market value per square footThe current public record shows about $626 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 60043.
  • Neighborhood value signalAmong 490 residential records in the same neighborhood, the average assessor market value is about $720 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.6% on average.

Comparable assessments

Similar public appraisal records selected for this property's equity comparison.

  • 315 Essex Rd Kenilworth, IL 60043
    6,899 sqft | $568/sqft | built 2011 | 8% larger (6,899 vs 6,377 sqft); Lot 17% larger (19,300 vs 16,450 sqft); Same quality (Average)
    $3,918,360
  • 156 Oxford Rd Kenilworth, IL 60043
    5,712 sqft | $588/sqft | built 2022 | 10% smaller (5,712 vs 6,377 sqft); Similar age (2022 vs 2021); Lot 11% larger (18,285 vs 16,450 sqft)
    $3,358,270
  • 515 Roslyn Rd Kenilworth, IL 60043
    5,206 sqft | $376/sqft | built 2026 | Similar age (2026 vs 2021); Similar lot size (17,500 vs 16,450 sqft); Same quality (Average)
    $1,957,840
  • 315 Cumnor Rd Kenilworth, IL 60043
    5,452 sqft | $597/sqft | built 2006 | 14% smaller (5,452 vs 6,377 sqft); Similar lot size (17,500 vs 16,450 sqft); Same quality (Average)
    $3,253,070
  • 229 Essex Rd Kenilworth, IL 60043
    5,102 sqft | $685/sqft | built 2017 | Similar age (2017 vs 2021); Similar lot size (15,440 vs 16,450 sqft); Same quality (Average)
    $3,496,070

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

No change in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$3,990,000$00.0%
2025$3,990,000+$643,500+19.2%
2024$3,346,500$00.0%
2023$3,346,500−$363,500−9.8%
2022$3,710,000+$1,472,620+65.8%
2021$2,237,380−$219,090−8.9%
2020$2,456,470——
6-year total+$1,533,530+62.4%