Cook County Value

1144 Blackthorn Ln, Northbrook, IL 60062

4 bed / 1 bath, 1,516 sqft, built 1941, in Northfield. Assessor market value for 2026: $620,000.

Cook County account 04092020320000

Assessor market value
$620,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,516 sqft
$409 per sqft
Year built
1941
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 60062 and 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 stayed about the same, from $620,000 in 2025 to $620,000 in 2026.
  • Assessor market value per square footThe current public record shows about $409 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Northfield neighborhood and ZIP 60062.
  • Neighborhood value signalAmong 2,200 residential records in the same neighborhood, the average assessor market value is about $346 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -2.0% on average.

Comparable assessments

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

  • 2241 Dewes St, Glenview, IL 60025
    1,512 sqft | $270/sqft | built 1939 | Similar size (1,512 vs 1,516 sqft); Similar age (1939 vs 1941); Similar lot size (9,350 vs 9,990 sqft)
    $408,680
  • 2744 Central Rd, Glenview, IL 60025
    1,531 sqft | $281/sqft | built 1952 | Similar size (1,531 vs 1,516 sqft); Similar lot size (10,020 vs 9,990 sqft); Same quality (Average)
    $430,000
  • 615 Spruce St, Glenview, IL 60025
    1,508 sqft | $391/sqft | built 1951 | Similar size (1,508 vs 1,516 sqft); Similar lot size (10,010 vs 9,990 sqft); Same quality (Average)
    $590,000
  • 2848 Central Rd, Glenview, IL 60025
    1,509 sqft | $311/sqft | built 1952 | Similar size (1,509 vs 1,516 sqft); Similar lot size (10,020 vs 9,990 sqft); Same quality (Average)
    $470,000
  • 601 Spruce St, Glenview, IL 60025
    1,499 sqft | $336/sqft | built 1952 | Similar size (1,499 vs 1,516 sqft); Similar lot size (9,750 vs 9,990 sqft); Same quality (Average)
    $504,240

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: . Showing the last prepared sales evidence while recent sales are refreshed. 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$620,000$00.0%
2025$620,000+$60,000+10.7%
2024$560,000$00.0%
2023$560,000$00.0%
2022$560,000+$141,430+33.8%
2021$418,570+$100.0%
2020$418,560——
6-year total+$201,440+48.1%