Cook County Value

829 Wenonah Ave, Oak Park, IL 60304

4 bed / 2 bath, 1,907 sqft, built 1920, in Oak Park. Assessor market value for 2026: $548,230.

Cook County account 16181280270000

In line with similar homes

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

Assessor market value$548,230
Similar homes$579,994
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
$548,230
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,907 sqft
$287 per sqft
Year built
1920
Average quality

What we found

Similar homes' assessments

Weak

1 of 8 similar homes is assessed lower per square foot. Their similarity-weighted median is $304.14/sqft, which supports a value of $579,994.

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 30.9% from $418,740 in 2025 to $548,230 in 2026.
  • Assessor market value per square footThe current public record shows about $287 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.

  • 527 S East Ave, Oak Park, IL 60304
    1,902 sqft | $319/sqft | built 1919 | Similar size (1,902 vs 1,907 sqft); Similar age (1919 vs 1920); Similar lot size (4,158 vs 4,166 sqft)
    $606,800
  • 525 S East Ave, Oak Park, IL 60304
    1,920 sqft | $292/sqft | built 1919 | Similar size (1,920 vs 1,907 sqft); Similar age (1919 vs 1920); Similar lot size (4,158 vs 4,166 sqft)
    $560,000
  • 744 S East Ave, Oak Park, IL 60304
    1,915 sqft | $308/sqft | built 1918 | Similar size (1,915 vs 1,907 sqft); Similar age (1918 vs 1920); Similar lot size (4,165 vs 4,166 sqft)
    $590,000
  • 726 Wesley Ave, Oak Park, IL 60304
    1,940 sqft | $340/sqft | built 1919 | Similar size (1,940 vs 1,907 sqft); Similar age (1919 vs 1920); Similar lot size (4,166 vs 4,166 sqft)
    $660,000
  • 522 Wesley Ave, Oak Park, IL 60304
    1,908 sqft | $278/sqft | built 1919 | Similar size (1,908 vs 1,907 sqft); Similar age (1919 vs 1920); Similar lot size (4,032 vs 4,166 sqft)
    $530,000

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 30.9% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$548,230+$129,490+30.9%
2025$418,740$00.0%
2024$418,740−$36,560−8.0%
2023$455,300+$89,070+24.3%
2022$366,230−$12,760−3.4%
2021$378,990$00.0%
2020$378,990——
6-year total+$169,240+44.7%