Cook County Value

308 S Grove Ave, Oak Park, IL 60302

6 bed / 2 bath, 3,356 sqft, built 1888, in Oak Park. Assessor market value for 2026: $820,000.

Cook County account 16073200030000

Assessor market value
$820,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,356 sqft
$244 per sqft
Year built
1888
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 increased 32.3% from $620,000 in 2025 to $820,000 in 2026.
  • Assessor market value per square footThe current public record shows about $244 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 513 residential records in the same neighborhood, the average assessor market value is about $269 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +24.8% on average.

Comparable assessments

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

  • 329 S Maple Ave, Oak Park, IL 60302
    3,323 sqft | $205/sqft | built 1894 | Similar size (3,323 vs 3,356 sqft); Similar lot size (6,800 vs 7,050 sqft); Same quality (Average)
    $680,000
  • 226 S Grove Ave, Oak Park, IL 60302
    3,126 sqft | $326/sqft | built 1885 | 7% smaller (3,126 vs 3,356 sqft); Similar age (1885 vs 1888); Similar lot size (7,050 vs 7,050 sqft)
    $1,020,000
  • 237 S Oak Park Ave, Oak Park, IL 60302
    3,452 sqft | $232/sqft | built 1878 | Similar size (3,452 vs 3,356 sqft); Similar lot size (7,050 vs 7,050 sqft); Same quality (Average)
    $800,000
  • 321 S Grove Ave, Oak Park, IL 60302
    3,052 sqft | $246/sqft | built 1892 | 9% smaller (3,052 vs 3,356 sqft); Similar age (1892 vs 1888); Similar lot size (7,050 vs 7,050 sqft)
    $750,000
  • 133 S Grove Ave, Oak Park, IL 60302
    3,449 sqft | $238/sqft | built 1888 | Similar size (3,449 vs 3,356 sqft); Built same year (1888); Lot 10% larger (7,755 vs 7,050 sqft)
    $820,000

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 32.3% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$820,000+$200,000+32.3%
2025$620,000$00.0%
2024$620,000$00.0%
2023$620,000+$127,120+25.8%
2022$492,880$00.0%
2021$492,880+$100.0%
2020$492,870——
6-year total+$327,130+66.4%