Cook County Value

12957 Dunmoor Dr Lemont, IL 60439

4 bed / 2 bath, 3,298 sqft, built 2010, in Lemont. Assessor market value for 2026: $810,000.

Cook County account 22352080100000

Assessor market value
$810,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,298 sqft
$246 per sqft
Year built
2010
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 24.6% from $650,000 in 2025 to $810,000 in 2026.
  • Assessor market value per square footThe current public record shows about $246 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.

  • 13651 Kettering Pky Lemont, IL 60439
    3,298 sqft | $290/sqft | built 2013 | Similar size (3,298 vs 3,298 sqft); Similar age (2013 vs 2010); Similar lot size (15,040 vs 14,922 sqft)
    $958,000
  • 1519 Magdalena Dr Lemont, IL 60439
    3,290 sqft | $295/sqft | built 2018 | Similar size (3,290 vs 3,298 sqft); Similar lot size (14,677 vs 14,922 sqft); Same quality (Average)
    $970,000
  • 13102 Lismore Ln Lemont, IL 60439
    3,312 sqft | $269/sqft | built 2015 | Similar size (3,312 vs 3,298 sqft); Similar age (2015 vs 2010); Similar lot size (14,212 vs 14,922 sqft)
    $890,000
  • 12744 Dunmoor Dr Lemont, IL 60439
    3,312 sqft | $263/sqft | built 2013 | Similar size (3,312 vs 3,298 sqft); Similar age (2013 vs 2010); Similar lot size (13,913 vs 14,922 sqft)
    $870,000
  • 13013 Waterford Dr Lemont, IL 60439
    3,312 sqft | $263/sqft | built 2013 | Similar size (3,312 vs 3,298 sqft); Similar age (2013 vs 2010); Similar lot size (13,868 vs 14,922 sqft)
    $870,000

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 24.6% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$810,000+$160,000+24.6%
2025$650,000$00.0%
2024$650,000$00.0%
2023$650,000+$184,630+39.7%
2022$465,370$00.0%
2021$465,370+$100.0%
2020$465,360——
6-year total+$344,640+74.1%