Cook County Value

12873 Rosa Ln Lemont, IL 60439

4 bed / 3 bath, 3,607 sqft, built 2016, in Lemont. Assessor market value for 2026: $920,000.

Cook County account 22232080190000

Assessor market value
$920,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,607 sqft
$255 per sqft
Year built
2016
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 31.4% from $700,000 in 2025 to $920,000 in 2026.
  • Assessor market value per square footThe current public record shows about $255 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 636 residential records in the same neighborhood, the average assessor market value is about $286 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +33.3% on average.

Comparable assessments

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

  • 12832 Rosa Ln Lemont, IL 60439
    3,767 sqft | $244/sqft | built 2021 | Similar size (3,767 vs 3,607 sqft); Similar age (2021 vs 2016); Similar lot size (15,778 vs 16,362 sqft)
    $920,000
  • 12895 Rosa Ln Lemont, IL 60439
    3,499 sqft | $263/sqft | built 2016 | Similar size (3,499 vs 3,607 sqft); Built same year (2016); Similar lot size (17,722 vs 16,362 sqft)
    $920,000
  • 11215 Como Ct Lemont, IL 60439
    3,292 sqft | $264/sqft | built 2017 | 9% smaller (3,292 vs 3,607 sqft); Similar age (2017 vs 2016); Similar lot size (14,790 vs 16,362 sqft)
    $870,000
  • 1007 Salim Pl Lemont, IL 60439
    3,662 sqft | $229/sqft | built 2001 | Similar size (3,662 vs 3,607 sqft); Lot 10% smaller (14,669 vs 16,362 sqft); Same quality (Average)
    $840,000
  • 12763 Rosa Ln Lemont, IL 60439
    3,661 sqft | $249/sqft | built 2022 | Similar size (3,661 vs 3,607 sqft); Same quality (Average); Same bed/bath (4/3)
    $910,000

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 | 5% size difference (3,421 sqft); Moderate age difference (9 years newer); Sold after the valuation date
    $930,895
  • 12655 Derry Dr Lemont, IL 60439
    June-29-2026 | 2,672 sqft | $266/sqft | built 2025 | Moderate age difference (9 years newer); 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 31.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$920,000+$220,000+31.4%
2025$700,000$00.0%
2024$700,000$00.0%
2023$700,000+$156,850+28.9%
2022$543,150$00.0%
2021$543,150$00.0%
2020$543,150——
6-year total+$376,850+69.4%