Cook County Value

12849 Klappa Dr Lemont, IL 60439

4 bed / 3 bath, 3,197 sqft, built 2004, in Lemont. Assessor market value for 2026: $800,000.

Cook County account 22312060100000

Assessor market value
$800,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,197 sqft
$250 per sqft
Year built
2004
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 25.3% from $638,420 in 2025 to $800,000 in 2026.
  • Assessor market value per square footThe current public record shows about $250 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 2,806 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 +30.4% on average.

Comparable assessments

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

  • 1440 Roscommon Way Lemont, IL 60439
    3,207 sqft | $240/sqft | built 2005 | Similar size (3,207 vs 3,197 sqft); Similar age (2005 vs 2004); Similar lot size (12,967 vs 12,637 sqft)
    $770,000
  • 13077 Spruce Hill Ct Lemont, IL 60439
    3,177 sqft | $255/sqft | built 2000 | Similar size (3,177 vs 3,197 sqft); Similar age (2000 vs 2004); Similar lot size (12,153 vs 12,637 sqft)
    $810,000
  • 12797 Tullamore Ln Lemont, IL 60439
    3,191 sqft | $270/sqft | built 2013 | Similar size (3,191 vs 3,197 sqft); Similar lot size (12,519 vs 12,637 sqft); Same quality (Average)
    $860,000
  • 16435 Christopher Dr Lemont, IL 60439
    3,178 sqft | $242/sqft | built 2001 | Similar size (3,178 vs 3,197 sqft); Similar age (2001 vs 2004); Similar lot size (12,987 vs 12,637 sqft)
    $770,000
  • 12638 Waterford Dr Lemont, IL 60439
    3,195 sqft | $269/sqft | built 2014 | Similar size (3,195 vs 3,197 sqft); Similar lot size (12,364 vs 12,637 sqft); Same quality (Average)
    $860,000

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 25.3% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$800,000+$161,580+25.3%
2025$638,420−$28,770−4.3%
2024$667,190−$42,810−6.0%
2023$710,000+$246,440+53.2%
2022$463,560$00.0%
2021$463,560$00.0%
2020$463,560——
6-year total+$336,440+72.6%