Cook County Value

3821 Gunderson Ave, Berwyn, IL 60402

3 bed / 1 bath, 1,107 sqft, built 1973, in Berwyn. Assessor market value for 2026: $300,000.

Cook County account 16314241270000

Assessor market value
$300,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,107 sqft
$271 per sqft
Year built
1973
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 60402 and Berwyn assessment pages.

Local guide: Berwyn Township 2026 Property Tax Appeal Guide.

Appeal deadlines

The 2026 appeal windows for Berwyn 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 36.4% from $220,000 in 2025 to $300,000 in 2026.
  • Assessor market value per square footThe current public record shows about $271 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Berwyn neighborhood and ZIP 60402.
  • Neighborhood value signalAmong 2,263 residential records in the same neighborhood, the average assessor market value is about $237 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +28.1% on average.

Comparable assessments

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

  • 3647 Highland Ave, Berwyn, IL 60402
    1,152 sqft | $269/sqft | built 1973 | Similar size (1,152 vs 1,107 sqft); Built same year (1973); Similar lot size (3,791 vs 3,939 sqft)
    $310,000
  • 3841 Clarence Ave, Berwyn, IL 60402
    1,104 sqft | $272/sqft | built 1962 | Similar size (1,104 vs 1,107 sqft); Similar lot size (3,939 vs 3,939 sqft); Same quality (Average)
    $300,000
  • 3736 Lombard Ave, Berwyn, IL 60402
    1,088 sqft | $267/sqft | built 1963 | Similar size (1,088 vs 1,107 sqft); Similar lot size (3,923 vs 3,939 sqft); Same quality (Average)
    $290,000
  • 3749 Oak Park Ave, Berwyn, IL 60402
    1,100 sqft | $264/sqft | built 1961 | Similar size (1,100 vs 1,107 sqft); Similar lot size (3,982 vs 3,939 sqft); Same quality (Average)
    $290,000
  • 3839 Clarence Ave, Berwyn, IL 60402
    1,104 sqft | $263/sqft | built 1962 | Similar size (1,104 vs 1,107 sqft); Similar lot size (4,070 vs 3,939 sqft); Same quality (Average)
    $290,000

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 36.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$300,000+$80,000+36.4%
2025$220,000$00.0%
2024$220,000$00.0%
2023$220,000+$44,210+25.1%
2022$175,790$00.0%
2021$175,790+$100.0%
2020$175,780——
6-year total+$124,220+70.7%