Cook County Value

512 Sixth St Lemont, IL 60439

3 bed / 1 bath, 1,897 sqft, built 1974, in Lemont. Assessor market value for 2026: $194,600.

Cook County account 22281050480000

Assessor market value
$194,600
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,897 sqft
$103 per sqft
Year built
1974
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 30.5% from $149,090 in 2025 to $194,600 in 2026.
  • Assessor market value per square footThe current public record shows about $103 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 858 residential records in the same neighborhood, the average assessor market value is about $264 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +21.4% on average.

Comparable assessments

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

  • 1133 Glenys Dr Lemont, IL 60439
    1,992 sqft | $241/sqft | built 1977 | 5% larger (1,992 vs 1,897 sqft); Similar age (1977 vs 1974); Similar lot size (11,200 vs 11,288 sqft)
    $480,000
  • 425 Keepataw Dr Lemont, IL 60439
    1,894 sqft | $248/sqft | built 1977 | Similar size (1,894 vs 1,897 sqft); Similar age (1977 vs 1974); Similar lot size (12,400 vs 11,288 sqft)
    $470,000
  • 428 Keepataw Dr Lemont, IL 60439
    1,924 sqft | $244/sqft | built 1977 | Similar size (1,924 vs 1,897 sqft); Similar age (1977 vs 1974); Similar lot size (10,828 vs 11,288 sqft)
    $470,010
  • 20 Keepataw Ct Lemont, IL 60439
    1,942 sqft | $227/sqft | built 1977 | Similar size (1,942 vs 1,897 sqft); Similar age (1977 vs 1974); Similar lot size (10,994 vs 11,288 sqft)
    $440,000
  • 1142 Alpine Ln Lemont, IL 60439
    1,877 sqft | $256/sqft | built 1985 | Similar size (1,877 vs 1,897 sqft); Similar lot size (10,872 vs 11,288 sqft); Same quality (Average)
    $480,000

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: . 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 30.5% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$194,600+$45,510+30.5%
2025$149,090$00.0%
2024$149,090$00.0%
2023$149,090+$83,270+126.5%
2022$65,820$00.0%
2021$65,820$00.0%
2020$65,820——
6-year total+$128,780+195.7%