Cook County Value

12490 Briarcliffe Dr Lemont, IL 60439

4 bed / 3 bath, 3,740 sqft, built 2005, in Lemont. Assessor market value for 2026: $910,010.

Cook County account 22303060160000

Assessor market value
$910,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,740 sqft
$243 per sqft
Year built
2005
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 16.7% from $780,000 in 2025 to $910,010 in 2026.
  • Assessor market value per square footThe current public record shows about $243 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 380 residential records in the same neighborhood, the average assessor market value is about $246 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +25.8% on average.

Comparable assessments

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

  • 13535 Cambridge Dr Lemont, IL 60439
    3,729 sqft | $263/sqft | built 2002 | Similar size (3,729 vs 3,740 sqft); Similar age (2002 vs 2005); Similar lot size (13,146 vs 13,140 sqft)
    $980,000
  • 12423 Briarcliffe Dr Lemont, IL 60439
    3,745 sqft | $232/sqft | built 2004 | Similar size (3,745 vs 3,740 sqft); Similar age (2004 vs 2005); Similar lot size (13,447 vs 13,140 sqft)
    $870,000
  • 12307 Province Dr Lemont, IL 60439
    3,709 sqft | $232/sqft | built 2004 | Similar size (3,709 vs 3,740 sqft); Similar age (2004 vs 2005); Similar lot size (13,436 vs 13,140 sqft)
    $860,010
  • 12475 Thornberry Dr Lemont, IL 60439
    3,740 sqft | $238/sqft | built 2005 | Similar size (3,740 vs 3,740 sqft); Built same year (2005); Similar lot size (12,452 vs 13,140 sqft)
    $890,010
  • 12644 Thornberry Dr Lemont, IL 60439
    3,872 sqft | $248/sqft | built 2005 | Similar size (3,872 vs 3,740 sqft); Built same year (2005); Similar lot size (13,100 vs 13,140 sqft)
    $960,910

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 | 8% size difference (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: . Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 16.7% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$910,010+$130,010+16.7%
2025$780,000$00.0%
2024$780,000$00.0%
2023$780,000+$236,880+43.6%
2022$543,120$00.0%
2021$543,120+$100.0%
2020$543,110——
6-year total+$366,900+67.6%