Cook County Value

12924 Archer Ave Lemont, IL 60439

5 bed / 3 bath, 4,373 sqft, built 2000, in Lemont. Assessor market value for 2026: $1,030,000.

Cook County account 22331030180000

Assessor market value
$1,030,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
4,373 sqft
$236 per sqft
Year built
2000
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 54.6% from $666,050 in 2025 to $1,030,000 in 2026.
  • Assessor market value per square footThe current public record shows about $236 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.

  • 13525 Oak Ct Lemont, IL 60439
    4,312 sqft | $235/sqft | built 1993 | Similar size (4,312 vs 4,373 sqft); Similar lot size (51,183 vs 53,578 sqft); Same quality (Average)
    $1,011,450
  • 12914 Archer Ave Lemont, IL 60439
    4,354 sqft | $225/sqft | built 2001 | Similar size (4,354 vs 4,373 sqft); Similar age (2001 vs 2000); Lot 18% smaller (44,044 vs 53,578 sqft)
    $980,000
  • 13608 Birch Ct Lemont, IL 60439
    4,553 sqft | $204/sqft | built 1998 | Similar size (4,553 vs 4,373 sqft); Similar age (1998 vs 2000); Lot 12% smaller (47,088 vs 53,578 sqft)
    $930,000
  • 26 Valley View Dr Lemont, IL 60439
    4,527 sqft | $181/sqft | built 1992 | Similar size (4,527 vs 4,373 sqft); Lot 10% smaller (48,046 vs 53,578 sqft); Same quality (Average)
    $820,000
  • 12790 Fairway Dr Lemont, IL 60439
    4,356 sqft | $200/sqft | built 1994 | Similar size (4,356 vs 4,373 sqft); Same quality (Average); Same neighborhood
    $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: . Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 54.6% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,030,000+$363,950+54.6%
2025$666,050$00.0%
2024$666,050$00.0%
2023$666,050+$177,520+36.3%
2022$488,530$00.0%
2021$488,530−$92,910−16.0%
2020$581,440——
6-year total+$448,560+77.1%