Cook County Value

309 N Marion St, Oak Park, IL 60302

4 bed / 2 bath, 2,722 sqft, built 1905, in Oak Park Assessor market value for 2026: $903,550.

Cook County account 16071070190000

Assessor market value
$903,550
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,722 sqft
$332 per sqft
Year built
1905
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 60302, Oak Park, and Oak Park assessment pages.

Local guide: Oak Park Township 2026 Property Tax Appeal Guide.

Appeal deadlines

The 2026 appeal windows for Oak Park 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 changed from $380,650 in 2025 to $903,550 in 2026. A change this large often reflects new construction, a reclassification or a record correction, so check it against the county record.
  • Assessor market value per square footThe current public record shows about $332 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Oak Park neighborhood and ZIP 60302.
  • Neighborhood value signalAmong 1,390 residential records in the same neighborhood, the average assessor market value is about $323 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +22.6% on average.

Comparable assessments

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

  • 730 N Grove Ave, Oak Park, IL 60302
    2,775 sqft | $328/sqft | built 1904 | Similar size (2,775 vs 2,722 sqft); Similar age (1904 vs 1905); Similar lot size (4,238 vs 4,290 sqft)
    $910,000
  • 102 N Kenilworth Ave 1, Oak Park, IL 60301
    2,650 sqft | $208/sqft | built 1906 | Similar size (2,650 vs 2,722 sqft); Similar age (1906 vs 1905); Similar lot size (4,320 vs 4,290 sqft)
    $550,000
  • 317 N Marion St, Oak Park, IL 60302
    2,642 sqft | $231/sqft | built 1903 | Similar size (2,642 vs 2,722 sqft); Similar age (1903 vs 1905); Similar lot size (4,290 vs 4,290 sqft)
    $610,000
  • 819 Woodbine Ave, Oak Park, IL 60302
    2,682 sqft | $312/sqft | built 1908 | Similar size (2,682 vs 2,722 sqft); Similar age (1908 vs 1905); Similar lot size (4,475 vs 4,290 sqft)
    $835,610
  • 315 N Marion St, Oak Park, IL 60302
    2,642 sqft | $227/sqft | built 1903 | Similar size (2,642 vs 2,722 sqft); Similar age (1903 vs 1905); Similar lot size (4,290 vs 4,290 sqft)
    $600,000

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: . Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 137.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$903,550+$522,900+137.4%
2025$380,650$00.0%
2024$380,650−$59,350−13.5%
2023$440,000+$153,640+53.7%
2022$286,360$00.0%
2021$286,360−$34,300−10.7%
2020$320,660——
6-year total+$582,890+181.8%