Cook County Value

13088 Dunmoor Dr Lemont, IL 60439

4 bed / 3 bath, 3,347 sqft, built 2008, in Lemont. Assessor market value for 2026: $840,000.

Cook County account 22352090260000

Assessor market value
$840,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,347 sqft
$251 per sqft
Year built
2008
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 23.5% from $680,000 in 2025 to $840,000 in 2026.
  • Assessor market value per square footThe current public record shows about $251 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.

  • 13300 Anne Dr Lemont, IL 60439
    3,339 sqft | $258/sqft | built 2013 | Similar size (3,339 vs 3,347 sqft); Similar age (2013 vs 2008); Similar lot size (15,050 vs 14,745 sqft)
    $860,000
  • 12763 Mayfair Dr Lemont, IL 60439
    3,367 sqft | $275/sqft | built 2014 | Similar size (3,367 vs 3,347 sqft); Similar lot size (14,397 vs 14,745 sqft); Same quality (Average)
    $925,000
  • 70 Deer Ln Lemont, IL 60439
    3,365 sqft | $264/sqft | built 2001 | Similar size (3,365 vs 3,347 sqft); Similar lot size (15,506 vs 14,745 sqft); Same quality (Average)
    $890,000
  • 13090 Ballycastle Ct Lemont, IL 60439
    3,362 sqft | $256/sqft | built 2010 | Similar size (3,362 vs 3,347 sqft); Similar age (2010 vs 2008); Lot 12% larger (16,466 vs 14,745 sqft)
    $860,000
  • 13419 Adeline Ct Lemont, IL 60439
    3,365 sqft | $294/sqft | built 2017 | Similar size (3,365 vs 3,347 sqft); Similar lot size (14,399 vs 14,745 sqft); Same quality (Average)
    $990,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 12554 Eileen St Lemont, IL 60439
    June-29-2026 | 3,421 sqft | $272/sqft | built 2025 | Similar size (3,421 sqft); Sold after the valuation date; Within 1 bedroom (5 vs 4)
    $930,895
  • 12655 Derry Dr Lemont, IL 60439
    June-29-2026 | 2,672 sqft | $266/sqft | built 2025 | Sold after the valuation date; Within 1 bedroom (3 vs 4)
    $710,150

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 23.5% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$840,000+$160,000+23.5%
2025$680,000$00.0%
2024$680,000$00.0%
2023$680,000+$201,010+42.0%
2022$478,990$00.0%
2021$478,990$00.0%
2020$478,990——
6-year total+$361,010+75.4%