Cook County Value

520 S Oak Park Ave, Oak Park, IL 60304

4 bed / 2 bath, 2,156 sqft, built 1898, in Oak Park. Assessor market value for 2026: $580,000.

Cook County account 16182000080000

In line with similar homes

8 similar homes nearby support a value at or above your county value.

Assessor market value$580,000
Similar homes$675,410
No gap: similar homes are at or above the county value · bars start at $0

How sure: High · 8 similar homes (5 shown below) · public records only

Assessor market value
$580,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,156 sqft
$269 per sqft
Year built
1898
Average quality

What we found

Similar homes' assessments

Weak

0 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $312.79/sqft, but land is valued apart from the home, and some of them have less land value per square foot of home than yours, which counts as $113,400. Counting your land in place of theirs where theirs is less, they support a value of $675,410.

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 39.2% from $416,620 in 2025 to $580,000 in 2026.
  • Assessor market value per square footThe current public record shows about $269 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 1,503 residential records in the same neighborhood, the average assessor market value is about $318 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +27.4% on average.

Comparable assessments

Showing 5 of the 8 similar homes in this property's equity comparison, from public appraisal records.

  • 726 S Euclid Ave, Oak Park, IL 60304
    2,159 sqft | $293/sqft | built 1901 | Similar size (2,159 vs 2,156 sqft); Similar age (1901 vs 1898); Similar lot size (6,300 vs 6,300 sqft)
    $632,380
  • 610 S Euclid Ave, Oak Park, IL 60304
    2,212 sqft | $312/sqft | built 1895 | Similar size (2,212 vs 2,156 sqft); Similar age (1895 vs 1898); Similar lot size (6,300 vs 6,300 sqft)
    $690,000
  • 632 S Grove Ave, Oak Park, IL 60304
    2,079 sqft | $351/sqft | built 1903 | Similar size (2,079 vs 2,156 sqft); Similar age (1903 vs 1898); Similar lot size (6,250 vs 6,300 sqft)
    $730,000
  • 610 Wenonah Ave, Oak Park, IL 60304
    2,202 sqft | $327/sqft | built 1903 | Similar size (2,202 vs 2,156 sqft); Similar age (1903 vs 1898); Similar lot size (6,250 vs 6,300 sqft)
    $720,000
  • 715 Wenonah Ave, Oak Park, IL 60304
    2,128 sqft | $310/sqft | built 1909 | Similar size (2,128 vs 2,156 sqft); Similar lot size (6,250 vs 6,300 sqft); Same quality (Average)
    $660,000

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 39.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$580,000+$163,380+39.2%
2025$416,620−$62,790−13.1%
2024$479,410−$20,590−4.1%
2023$500,000+$130,090+35.2%
2022$369,910$00.0%
2021$369,910+$100.0%
2020$369,900——
6-year total+$210,100+56.8%