Cook County Value

302 Main St Lemont, IL 60439

3 bed / 2 bath, 2,590 sqft, built 1889, in Lemont. Assessor market value for 2026: $410,010.

Cook County account 22204180230000

Assessor market value
$410,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,590 sqft
$158 per sqft
Year built
1889
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 10.8% from $370,010 in 2025 to $410,010 in 2026.
  • Assessor market value per square footThe current public record shows about $158 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.

  • 509 Singer Ave Lemont, IL 60439
    2,508 sqft | $203/sqft | built 1886 | Similar size (2,508 vs 2,590 sqft); Similar age (1886 vs 1889); Similar lot size (6,664 vs 6,492 sqft)
    $510,000
  • 317 Freehauf St Lemont, IL 60439
    2,578 sqft | $155/sqft | built 1891 | Similar size (2,578 vs 2,590 sqft); Similar age (1891 vs 1889); Similar lot size (6,708 vs 6,492 sqft)
    $400,010
  • 503 Singer Ave Lemont, IL 60439
    2,351 sqft | $230/sqft | built 1888 | 9% smaller (2,351 vs 2,590 sqft); Similar age (1888 vs 1889); Similar lot size (6,664 vs 6,492 sqft)
    $540,000
  • 615 Singer Ave Lemont, IL 60439
    2,375 sqft | $194/sqft | built 1887 | 8% smaller (2,375 vs 2,590 sqft); Similar age (1887 vs 1889); Similar lot size (5,994 vs 6,492 sqft)
    $460,000
  • 808 State St Lemont, IL 60439
    2,238 sqft | $174/sqft | built 1898 | 14% smaller (2,238 vs 2,590 sqft); Similar lot size (6,660 vs 6,492 sqft); Same quality (Average)
    $390,010

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 10.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$410,010+$40,000+10.8%
2025$370,010$00.0%
2024$370,010$00.0%
2023$370,010+$113,180+44.1%
2022$256,830$00.0%
2021$256,830+$100.0%
2020$256,820——
6-year total+$153,190+59.6%