Cook County Value

428 Talcott Ave Lemont, IL 60439

6 bed / 3 bath, 2,517 sqft, built 1856, in Lemont. Assessor market value for 2026: $420,010.

Cook County account 22204060110000

Assessor market value
$420,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,517 sqft
$167 per sqft
Year built
1856
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 19.8% from $350,720 in 2025 to $420,010 in 2026.
  • Assessor market value per square footThe current public record shows about $167 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

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

  • 420 Talcott Ave Lemont, IL 60439
    2,544 sqft | $149/sqft | built 1858 | Similar size (2,544 vs 2,517 sqft); Similar age (1858 vs 1856); Similar lot size (6,500 vs 6,500 sqft)
    $380,010
  • 307 Lemont St Lemont, IL 60439
    2,591 sqft | $232/sqft | built 1863 | Similar size (2,591 vs 2,517 sqft); Lot 11% smaller (5,800 vs 6,500 sqft); Same quality (Average)
    $600,000
  • 307 Canal St Lemont, IL 60439
    2,075 sqft | $183/sqft | built 1859 | Similar age (1859 vs 1856); Similar lot size (6,513 vs 6,500 sqft); Same quality (Average)
    $380,000
  • 500 E Illinois St Lemont, IL 60439
    2,362 sqft | $157/sqft | built 1856 | 6% smaller (2,362 vs 2,517 sqft); Built same year (1856); Same quality (Average)
    $370,010
  • 610 Porter St Lemont, IL 60439
    2,852 sqft | $165/sqft | built 1871 | 13% larger (2,852 vs 2,517 sqft); Same quality (Average); Same neighborhood
    $470,000

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: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 19.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$420,010+$69,290+19.8%
2025$350,720$00.0%
2024$350,720−$39,290−10.1%
2023$390,010+$151,520+63.5%
2022$238,490$00.0%
2021$238,490$00.0%
2020$238,490——
6-year total+$181,520+76.1%