Cook County Value

717 Warner Ave Lemont, IL 60439

3 bed / 1 bath, 1,116 sqft, built 1878, in Lemont. Assessor market value for 2026: $280,000.

Cook County account 22291100050000

Assessor market value
$280,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,116 sqft
$251 per sqft
Year built
1878
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 60439 and Lemont assessment pages.

Local guide: Lemont Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Lemont, appeals to the Assessor closed . Board of Review dates for Lemont have not been published yet.

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 47.4% from $190,000 in 2025 to $280,000 in 2026.
  • Assessor market value per square footThe current public record shows about $251 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Lemont neighborhood and ZIP 60439.
  • Neighborhood value signalAmong 1,277 residential records in the same neighborhood, the average assessor market value is about $255 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +25.5% on average.

Comparable assessments

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

  • 716 Chestnut St Lemont, IL 60439
    1,042 sqft | $345/sqft | built 1878 | 7% smaller (1,042 vs 1,116 sqft); Built same year (1878); Similar lot size (7,872 vs 8,122 sqft)
    $360,000
  • 808 Singer Ave Lemont, IL 60439
    1,082 sqft | $259/sqft | built 1873 | Similar size (1,082 vs 1,116 sqft); Similar age (1873 vs 1878); Similar lot size (8,520 vs 8,122 sqft)
    $280,000
  • 713 State St Lemont, IL 60439
    1,185 sqft | $203/sqft | built 1885 | 6% larger (1,185 vs 1,116 sqft); Similar lot size (7,881 vs 8,122 sqft); Same quality (Average)
    $240,000
  • 824 Singer Ave Lemont, IL 60439
    1,020 sqft | $353/sqft | built 1885 | 9% smaller (1,020 vs 1,116 sqft); Similar lot size (8,520 vs 8,122 sqft); Same quality (Average)
    $360,000
  • 828 Singer Ave Lemont, IL 60439
    1,000 sqft | $300/sqft | built 1878 | 10% smaller (1,000 vs 1,116 sqft); Built same year (1878); Similar lot size (8,520 vs 8,122 sqft)
    $300,000

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 47.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$280,000+$90,000+47.4%
2025$190,000$00.0%
2024$190,000$00.0%
2023$190,000+$38,190+25.2%
2022$151,810$00.0%
2021$151,810$00.0%
2020$151,810——
6-year total+$128,190+84.4%