Cook County Value

331 Thatcher Ave River Forest, IL 60305

4 bed / 2 bath, 1,998 sqft, built 1903, in River Forest. Assessor market value for 2026: $766,920.

Cook County account 15114010070000

Assessor market value
$766,920
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,998 sqft
$384 per sqft
Year built
1903
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 60305 and River Forest assessment pages.

Local guide: River Forest Township 2026 Property Tax Appeal Guide.

Appeal deadlines

The 2026 appeal windows for River Forest 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 increased 20.4% from $636,920 in 2025 to $766,920 in 2026.
  • Assessor market value per square footThe current public record shows about $384 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the River Forest neighborhood and ZIP 60305.
  • Neighborhood value signalAmong 709 residential records in the same neighborhood, the average assessor market value is about $341 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +16.9% on average.

Comparable assessments

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

  • 230 Gale Ave River Forest, IL 60305
    2,018 sqft | $382/sqft | built 1901 | Similar size (2,018 vs 1,998 sqft); Similar age (1901 vs 1903); Similar lot size (10,532 vs 9,792 sqft)
    $770,000
  • 122 Ashland Ave River Forest, IL 60305
    2,022 sqft | $356/sqft | built 1912 | Similar size (2,022 vs 1,998 sqft); Similar lot size (9,612 vs 9,792 sqft); Same quality (Average)
    $720,000
  • 335 Gale Ave River Forest, IL 60305
    2,043 sqft | $362/sqft | built 1892 | Similar size (2,043 vs 1,998 sqft); Similar lot size (9,776 vs 9,792 sqft); Same quality (Average)
    $740,000
  • 103 Gale Ave River Forest, IL 60305
    2,142 sqft | $364/sqft | built 1902 | 7% larger (2,142 vs 1,998 sqft); Similar age (1902 vs 1903); Similar lot size (9,400 vs 9,792 sqft)
    $780,000
  • 231 Thatcher Ave River Forest, IL 60305
    2,164 sqft | $360/sqft | built 1901 | 8% larger (2,164 vs 1,998 sqft); Similar age (1901 vs 1903); Similar lot size (10,000 vs 9,792 sqft)
    $780,000

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: . 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

Up 20.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$766,920+$130,000+20.4%
2025$636,920$00.0%
2024$636,920+$26,920+4.4%
2023$610,000+$129,200+26.9%
2022$480,800−$13,570−2.7%
2021$494,370+$200.0%
2020$494,350——
6-year total+$272,570+55.1%