Cook County Value

15 Keystone Ave River Forest, IL 60305

3 bed / 1 bath, 2,040 sqft, built 1912, in River Forest. Assessor market value for 2026: $730,000.

Cook County account 15123190090000

Assessor market value
$730,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,040 sqft
$358 per sqft
Year built
1912
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 35.2% from $540,000 in 2025 to $730,000 in 2026.
  • Assessor market value per square footThe current public record shows about $358 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.

  • 303 Gale Ave River Forest, IL 60305
    2,090 sqft | $325/sqft | built 1910 | Similar size (2,090 vs 2,040 sqft); Similar age (1910 vs 1912); Similar lot size (9,400 vs 9,400 sqft)
    $680,000
  • 122 Ashland Ave River Forest, IL 60305
    2,022 sqft | $356/sqft | built 1912 | Similar size (2,022 vs 2,040 sqft); Built same year (1912); Similar lot size (9,612 vs 9,400 sqft)
    $720,000
  • 138 Gale Ave River Forest, IL 60305
    2,052 sqft | $346/sqft | built 1918 | Similar size (2,052 vs 2,040 sqft); Similar lot size (9,000 vs 9,400 sqft); Same quality (Average)
    $710,000
  • 46 Keystone Ave River Forest, IL 60305
    1,978 sqft | $339/sqft | built 1908 | Similar size (1,978 vs 2,040 sqft); Similar age (1908 vs 1912); Similar lot size (8,815 vs 9,400 sqft)
    $670,000
  • 234 Gale Ave River Forest, IL 60305
    2,122 sqft | $368/sqft | built 1913 | Similar size (2,122 vs 2,040 sqft); Similar age (1913 vs 1912); Similar lot size (10,110 vs 9,400 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 35.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$730,000+$190,000+35.2%
2025$540,000$00.0%
2024$540,000$00.0%
2023$540,000+$134,300+33.1%
2022$405,700$00.0%
2021$405,700+$100.0%
2020$405,690——
6-year total+$324,310+79.9%