Cook County Value

407 Warner Ave Lemont, IL 60439

3 bed / 1 bath, 1,537 sqft, built 1910, in Lemont. Assessor market value for 2026: $360,000.

Cook County account 22203170020000

Assessor market value
$360,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,537 sqft
$234 per sqft
Year built
1910
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 16.1% from $310,000 in 2025 to $360,000 in 2026.
  • Assessor market value per square footThe current public record shows about $234 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.

  • 215 Freehauf St Lemont, IL 60439
    1,608 sqft | $211/sqft | built 1904 | Similar size (1,608 vs 1,537 sqft); Similar lot size (8,400 vs 8,520 sqft); Same quality (Average)
    $340,000
  • 31 E Logan St Lemont, IL 60439
    1,534 sqft | $248/sqft | built 1912 | Similar size (1,534 vs 1,537 sqft); Similar age (1912 vs 1910); Lot 19% larger (10,125 vs 8,520 sqft)
    $380,000
  • 215 Cass St Lemont, IL 60439
    1,440 sqft | $229/sqft | built 1913 | 6% smaller (1,440 vs 1,537 sqft); Similar age (1913 vs 1910); Similar lot size (8,712 vs 8,520 sqft)
    $330,000
  • 912 Singer Ave Lemont, IL 60439
    1,638 sqft | $238/sqft | built 1916 | 7% larger (1,638 vs 1,537 sqft); Similar lot size (8,520 vs 8,520 sqft); Same quality (Average)
    $390,000
  • 430 Grant St Lemont, IL 60439
    1,664 sqft | $258/sqft | built 1912 | 8% larger (1,664 vs 1,537 sqft); Similar age (1912 vs 1910); Similar lot size (8,899 vs 8,520 sqft)
    $430,000

Recent comparable sales

No usable comparable sales are available in this data snapshot.

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 16.1% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$360,000+$50,000+16.1%
2025$310,000$00.0%
2024$310,000$00.0%
2023$310,000+$112,930+57.3%
2022$197,070$00.0%
2021$197,070$00.0%
2020$197,070——
6-year total+$162,930+82.7%