Cook County Value

12486 Archer Ave Lemont, IL 60439

3 bed / 2 bath, 2,026 sqft, built 1987, in Lemont. Assessor market value for 2026: $560,000.

Cook County account 22273000380000

Assessor market value
$560,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,026 sqft
$276 per sqft
Year built
1987
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 33.5% from $419,610 in 2025 to $560,000 in 2026.
  • Assessor market value per square footThe current public record shows about $276 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.

  • 24 Emily Ln Lemont, IL 60439
    2,033 sqft | $280/sqft | built 1992 | Similar size (2,033 vs 2,026 sqft); Similar age (1992 vs 1987); Similar lot size (40,902 vs 40,001 sqft)
    $570,000
  • 173 Shannon Ct Lemont, IL 60439
    1,999 sqft | $265/sqft | built 1989 | Similar size (1,999 vs 2,026 sqft); Similar age (1989 vs 1987); Similar lot size (41,382 vs 40,001 sqft)
    $530,000
  • 1236 Leinster Dr Lemont, IL 60439
    2,010 sqft | $264/sqft | built 1985 | Similar size (2,010 vs 2,026 sqft); Similar age (1985 vs 1987); Similar lot size (40,946 vs 40,001 sqft)
    $530,000
  • 1232 Emerald Dr Lemont, IL 60439
    2,060 sqft | $299/sqft | built 1985 | Similar size (2,060 vs 2,026 sqft); Similar age (1985 vs 1987); Similar lot size (41,382 vs 40,001 sqft)
    $615,900
  • 12516 Archer Ave Lemont, IL 60439
    1,999 sqft | $250/sqft | built 1990 | Similar size (1,999 vs 2,026 sqft); Similar age (1990 vs 1987); Similar lot size (36,577 vs 40,001 sqft)
    $500,000

Recent comparable sales

No usable comparable sales are available in this data snapshot.

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 33.5% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$560,000+$140,390+33.5%
2025$419,610$00.0%
2024$419,610−$50,400−10.7%
2023$470,010+$117,660+33.4%
2022$352,350$00.0%
2021$352,350$00.0%
2020$352,350——
6-year total+$207,650+58.9%