Cook County Value

15824 New Ave Lemont, IL 60439

5 bed / 2 bath, 2,587 sqft, built 1929, in Lemont. Assessor market value for 2026: $440,010.

Cook County account 22203050550000

Assessor market value
$440,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,587 sqft
$170 per sqft
Year built
1929
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 2.3% from $430,010 in 2025 to $440,010 in 2026.
  • Assessor market value per square footThe current public record shows about $170 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.

  • 728 Warner Ave Lemont, IL 60439
    2,392 sqft | $201/sqft | built 1924 | 8% smaller (2,392 vs 2,587 sqft); Similar age (1924 vs 1929); Lot 11% smaller (12,600 vs 14,100 sqft)
    $480,000
  • 10 E Logan St Lemont, IL 60439
    2,282 sqft | $193/sqft | built 1940 | 12% smaller (2,282 vs 2,587 sqft); Similar lot size (14,880 vs 14,100 sqft); Same quality (Average)
    $440,000
  • 415 Fremont St Lemont, IL 60439
    2,800 sqft | $139/sqft | built 1921 | 8% larger (2,800 vs 2,587 sqft); Lot 17% smaller (11,748 vs 14,100 sqft); Same quality (Average)
    $390,010
  • 419 Holmes St Lemont, IL 60439
    2,655 sqft | $196/sqft | built 1924 | Similar size (2,655 vs 2,587 sqft); Similar age (1924 vs 1929); Same quality (Average)
    $520,010
  • 311 Lemont St Lemont, IL 60439
    2,285 sqft | $258/sqft | built 1914 | 12% smaller (2,285 vs 2,587 sqft); Lot 12% smaller (12,408 vs 14,100 sqft); Same quality (Average)
    $590,000

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 2.3% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$440,010+$10,000+2.3%
2025$430,010$00.0%
2024$430,010$00.0%
2023$430,010+$171,760+66.5%
2022$258,250$00.0%
2021$258,250$00.0%
2020$258,250——
6-year total+$181,760+70.4%