Cook County Value

909 Marengo Ave Forest Park, IL 60130

4 bed / 2 bath, 1,071 sqft, built 1908, in Proviso Assessor market value for 2026: $360,000.

Cook County account 15134130220000

Assessor market value
$360,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,071 sqft
$336 per sqft
Year built
1908
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 60130 and Proviso assessment pages.

Local guide: Proviso Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Proviso, appeals to the Assessor are open through (8 days left).

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 14.8% from $313,500 in 2025 to $360,000 in 2026.
  • Assessor market value per square footThe current public record shows about $336 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Proviso neighborhood and ZIP 60130.
  • Neighborhood value signalAmong 1,610 residential records in the same neighborhood, the average assessor market value is about $258 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +17.7% on average.

Comparable assessments

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

  • 1131 Thomas Ave Forest Park, IL 60130
    1,086 sqft | $322/sqft | built 1909 | Similar size (1,086 vs 1,071 sqft); Similar age (1909 vs 1908); Similar lot size (4,687 vs 4,687 sqft)
    $350,000
  • 924 Circle Ave Forest Park, IL 60130
    1,032 sqft | $484/sqft | built 1913 | Similar size (1,032 vs 1,071 sqft); Similar age (1913 vs 1908); Similar lot size (4,687 vs 4,687 sqft)
    $500,000
  • 819 Circle Ave Forest Park, IL 60130
    1,047 sqft | $430/sqft | built 1903 | Similar size (1,047 vs 1,071 sqft); Similar age (1903 vs 1908); Similar lot size (4,687 vs 4,687 sqft)
    $450,000
  • 937 Thomas Ave Forest Park, IL 60130
    1,056 sqft | $303/sqft | built 1916 | Similar size (1,056 vs 1,071 sqft); Similar lot size (4,687 vs 4,687 sqft); Same quality (Average)
    $320,000
  • 940 Marengo Ave Forest Park, IL 60130
    1,045 sqft | $306/sqft | built 1911 | Similar size (1,045 vs 1,071 sqft); Similar age (1911 vs 1908); Similar lot size (4,687 vs 4,687 sqft)
    $320,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 1125 Marengo Ave Forest Park, IL 60130
    1,040 sqft | $372/sqft | built 1923 | Similar size (1,040 sqft); Within 1 bedroom (3 vs 4)
    $387,000

Public appraisal comparison for 2026. Prepared . Appraisal source: Cook County Assessor's Office. Sales data checked in this snapshot: . Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 14.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$360,000+$46,500+14.8%
2025$313,500$00.0%
2024$313,500−$16,500−5.0%
2023$330,000+$111,910+51.3%
2022$218,090$00.0%
2021$218,090+$100.0%
2020$218,080——
6-year total+$141,920+65.1%