Cook County Value

12432 Portrush Ln Lemont, IL 60439

3 bed / 4 bath, 2,755 sqft, built 2024, in Lemont. Assessor market value for 2026: $710,010.

Cook County account 22263080020000

Likely too high

about $47,000

8 similar homes nearby point to a value about $47,000 lower than yours.

Assessor market value$710,010
Similar homes$662,770
$47,240 gap · bars start at $0

How sure: High · 8 similar homes (5 shown below) · public records only

Assessor market value
$710,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,755 sqft
$258 per sqft
Year built
2024
Average quality

Why we think so

Similar homes' assessments

Strong

5 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $240.57/sqft, which supports a value of $662,770.

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 9.2% from $650,000 in 2025 to $710,010 in 2026.
  • Assessor market value per square footThe current public record shows about $258 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 858 residential records in the same neighborhood, the average assessor market value is about $264 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +21.4% on average.

Comparable assessments

Showing 5 of the 8 similar homes in this property's equity comparison, from public appraisal records.

  • 12400 Portrush Ln Lemont, IL 60439
    2,755 sqft | $229/sqft | built 2024 | Similar size (2,755 vs 2,755 sqft); Built same year (2024); Similar lot size (8,449 vs 8,908 sqft)
    $630,000
  • 13448 Belfast Way Lemont, IL 60439
    2,664 sqft | $233/sqft | built 2025 | Similar size (2,664 vs 2,755 sqft); Similar age (2025 vs 2024); Similar lot size (8,875 vs 8,908 sqft)
    $620,000
  • 13447 Belfast Way Lemont, IL 60439
    2,662 sqft | $267/sqft | built 2025 | Similar size (2,662 vs 2,755 sqft); Similar age (2025 vs 2024); Similar lot size (8,843 vs 8,908 sqft)
    $710,000
  • 13443 Belfast Way Lemont, IL 60439
    2,785 sqft | $241/sqft | built 2025 | Similar size (2,785 vs 2,755 sqft); Similar age (2025 vs 2024); Similar lot size (9,729 vs 8,908 sqft)
    $670,000
  • 12430 Rossaveal Way Lemont, IL 60439
    2,616 sqft | $268/sqft | built 2023 | 5% smaller (2,616 vs 2,755 sqft); Similar age (2023 vs 2024); Similar lot size (9,136 vs 8,908 sqft)
    $700,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 12655 Derry Dr Lemont, IL 60439
    June-29-2026 | 2,672 sqft | $266/sqft | built 2025 | Similar size (2,672 sqft); Similar age (2025); Sold after the valuation date
    $710,150
  • 12554 Eileen St Lemont, IL 60439
    June-29-2026 | 3,421 sqft | $272/sqft | built 2025 | Similar age (2025); Sold after the valuation date
    $930,895
  • 997 Florence St Lemont, IL 60439
    2,556 sqft | $319/sqft | built 2017 | 7% size difference (2,556 sqft); Moderate age difference (7 years older); Within 1 bedroom (4 vs 3)
    $815,000
  • 1217 Woburn Dr Lemont, IL 60439
    2,576 sqft | $318/sqft | built 2016 | 6% size difference (2,576 sqft); Moderate age difference (8 years older); Within 1 bedroom (4 vs 3)
    $819,000

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 9.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$710,010+$60,010+9.2%
2025$650,000+$355,260+120.5%
2024$294,740——
2-year total+$415,270+140.9%