Cook County Value

1033 Gunderson Ave, Oak Park, IL 60304

3 bed / 2 bath, 1,166 sqft, built 1916, in Oak Park. Assessor market value for 2026: $432,280.

Cook County account 16184110540000

Assessor market value
$432,280
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,166 sqft
$371 per sqft
Year built
1916
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 60304, 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 21.8% from $354,980 in 2025 to $432,280 in 2026.
  • Assessor market value per square footThe current public record shows about $371 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 60304.
  • Neighborhood value signalAmong 1,599 residential records in the same neighborhood, the average assessor market value is about $303 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +19.0% on average.

Comparable assessments

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

  • 1166 S East Ave, Oak Park, IL 60304
    1,155 sqft | $329/sqft | built 1921 | Similar size (1,155 vs 1,166 sqft); Similar age (1921 vs 1916); Similar lot size (6,300 vs 6,300 sqft)
    $380,000
  • 1024 Wisconsin Ave, Oak Park, IL 60304
    1,160 sqft | $362/sqft | built 1913 | Similar size (1,160 vs 1,166 sqft); Similar age (1913 vs 1916); Similar lot size (6,000 vs 6,300 sqft)
    $420,000
  • 1161 Home Ave, Oak Park, IL 60304
    1,134 sqft | $370/sqft | built 1918 | Similar size (1,134 vs 1,166 sqft); Similar age (1918 vs 1916); Similar lot size (6,512 vs 6,300 sqft)
    $420,000
  • 1040 S Grove Ave, Oak Park, IL 60304
    1,148 sqft | $470/sqft | built 1912 | Similar size (1,148 vs 1,166 sqft); Similar age (1912 vs 1916); Similar lot size (6,850 vs 6,300 sqft)
    $540,000
  • 1130 S Scoville Ave, Oak Park, IL 60304
    1,190 sqft | $345/sqft | built 1922 | Similar size (1,190 vs 1,166 sqft); Lot 14% smaller (5,418 vs 6,300 sqft); Same quality (Average)
    $410,000

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 21.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$432,280+$77,300+21.8%
2025$354,980−$23,680−6.3%
2024$378,660−$21,340−5.3%
2023$400,000+$88,170+28.3%
2022$311,830−$21,760−6.5%
2021$333,590$00.0%
2020$333,590——
6-year total+$98,690+29.6%