Cook County Value

1135 Jeffery Ct Northbrook

4 bed / 2 bath, 2,316 sqft, built 1959, in Northfield. Assessor market value for 2026: $740,230.

Cook County account 04102010530000

Assessor market value
$740,230
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,316 sqft
$320 per sqft
Year built
1959
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 Northfield assessment pages.

Local guide: Northfield Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Northfield, appeals to the Assessor closed . Board of Review dates for Northfield have not been published yet.

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 2.8% from $761,700 in 2025 to $740,230 in 2026.
  • Assessor market value per square footThe current public record shows about $320 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Northfield neighborhood.
  • Neighborhood value signalAmong 556 residential records in the same neighborhood, the average assessor market value is about $331 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.0% on average.

Comparable assessments

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

  • 925 Bittersweet Dr, Northbrook, IL 60062
    2,212 sqft | $326/sqft | built 1957 | Similar size (2,212 vs 2,316 sqft); Similar age (1957 vs 1959); Similar lot size (15,487 vs 14,991 sqft)
    $720,000
  • 940 Lee Rd, Northbrook, IL 60062
    2,249 sqft | $298/sqft | built 1952 | Similar size (2,249 vs 2,316 sqft); Similar lot size (14,850 vs 14,991 sqft); Same quality (Average)
    $670,000
  • 1238 Country Ln, Northbrook, IL 60062
    2,294 sqft | $300/sqft | built 1954 | Similar size (2,294 vs 2,316 sqft); Similar age (1954 vs 1959); Similar lot size (13,770 vs 14,991 sqft)
    $688,510
  • 918 Lee Rd, Northbrook, IL 60062
    2,449 sqft | $286/sqft | built 1949 | 6% larger (2,449 vs 2,316 sqft); Similar lot size (14,850 vs 14,991 sqft); Same quality (Average)
    $700,000
  • 7 Timber Ln, Northbrook, IL 60062
    2,330 sqft | $286/sqft | built 1966 | Similar size (2,330 vs 2,316 sqft); Lot 12% smaller (13,200 vs 14,991 sqft); Same quality (Average)
    $665,710

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. Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Down 2.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$740,230−$21,470−2.8%
2025$761,700+$172,640+29.3%
2024$589,060−$33,360−5.4%
2023$622,420−$37,980−5.8%
2022$660,400+$172,150+35.3%
2021$488,250——
5-year total+$251,980+51.6%