Cook County Value

942 William St River Forest, IL 60305

4 bed / 2 bath, 2,724 sqft, built 1922, in River Forest. Assessor market value for 2026: $1,034,470.

Cook County account 15014090140000

Assessor market value
$1,034,470
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,724 sqft
$380 per sqft
Year built
1922
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 34.5% from $769,070 in 2025 to $1,034,470 in 2026.
  • Assessor market value per square footThe current public record shows about $380 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 439 residential records in the same neighborhood, the average assessor market value is about $381 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +32.9% on average.

Comparable assessments

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

  • 938 William St River Forest, IL 60305
    2,673 sqft | $359/sqft | built 1921 | Similar size (2,673 vs 2,724 sqft); Similar age (1921 vs 1922); Similar lot size (9,400 vs 9,400 sqft)
    $960,000
  • 934 William St River Forest, IL 60305
    2,820 sqft | $376/sqft | built 1924 | Similar size (2,820 vs 2,724 sqft); Similar age (1924 vs 1922); Similar lot size (9,400 vs 9,400 sqft)
    $1,060,000
  • 930 William St River Forest, IL 60305
    2,674 sqft | $340/sqft | built 1920 | Similar size (2,674 vs 2,724 sqft); Similar age (1920 vs 1922); Similar lot size (9,400 vs 9,400 sqft)
    $910,000
  • 803 Monroe Ave River Forest, IL 60305
    2,632 sqft | $372/sqft | built 1919 | Similar size (2,632 vs 2,724 sqft); Similar age (1919 vs 1922); Similar lot size (9,400 vs 9,400 sqft)
    $980,000
  • 926 Jackson Ave River Forest, IL 60305
    2,628 sqft | $388/sqft | built 1923 | Similar size (2,628 vs 2,724 sqft); Similar age (1923 vs 1922); Similar lot size (9,250 vs 9,400 sqft)
    $1,020,000

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 34.5% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,034,470+$265,400+34.5%
2025$769,070−$110,100−12.5%
2024$879,170$00.0%
2023$879,170+$360,080+69.4%
2022$519,090$00.0%
2021$519,090$00.0%
2020$519,090——
6-year total+$515,380+99.3%