Cook County Value

1417 Marengo Ave Forest Park, IL 60130

3 bed / 1 bath, 1,008 sqft, built 1956, in Proviso. Assessor market value for 2026: $310,000.

Cook County account 15242100510000

Assessor market value
$310,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,008 sqft
$308 per sqft
Year built
1956
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 6.9% from $290,000 in 2025 to $310,000 in 2026.
  • Assessor market value per square footThe current public record shows about $308 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.

  • 1235 Elgin Ave Forest Park, IL 60130
    1,035 sqft | $300/sqft | built 1960 | Similar size (1,035 vs 1,008 sqft); Similar age (1960 vs 1956); Similar lot size (4,500 vs 4,432 sqft)
    $310,000
  • 7736 Taylor St Forest Park, IL 60130
    950 sqft | $295/sqft | built 1955 | 6% smaller (950 vs 1,008 sqft); Similar age (1955 vs 1956); Similar lot size (4,485 vs 4,432 sqft)
    $280,000
  • 1511 Elgin Ave Forest Park, IL 60130
    1,008 sqft | $317/sqft | built 1957 | Similar size (1,008 vs 1,008 sqft); Similar age (1957 vs 1956); Lot 15% smaller (3,750 vs 4,432 sqft)
    $320,000
  • 7709 Polk St Forest Park, IL 60130
    1,020 sqft | $324/sqft | built 1957 | Similar size (1,020 vs 1,008 sqft); Similar age (1957 vs 1956); Lot 11% smaller (3,938 vs 4,432 sqft)
    $330,000
  • 1042 Thomas Ave Forest Park, IL 60130
    969 sqft | $372/sqft | built 1950 | Similar size (969 vs 1,008 sqft); Similar lot size (4,650 vs 4,432 sqft); Same quality (Average)
    $360,000

Recent comparable sales

No usable comparable sales are available in this data snapshot.

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 6.9% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$310,000+$20,000+6.9%
2025$290,000$00.0%
2024$290,000$00.0%
2023$290,000+$91,940+46.4%
2022$198,060$00.0%
2021$198,060−$21,560−9.8%
2020$219,620——
6-year total+$90,380+41.2%