Cook County Value

15200 129th St Lemont, IL 60439

4 bed / 3 bath, 6,349 sqft, built 2000, in Lemont. Assessor market value for 2026: $1,240,000.

Cook County account 22322030120000

Assessor market value
$1,240,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
6,349 sqft
$195 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 changed from $747,880 in 2025 to $1,240,000 in 2026. A change this large often reflects new construction, a reclassification or a record correction, so check it against the county record.
  • Assessor market value per square footThe current public record shows about $195 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.

  • 13410 King Rd Lemont, IL 60439
    6,182 sqft | $218/sqft | built 2006 | Similar size (6,182 vs 6,349 sqft); Similar lot size (96,267 vs 103,150 sqft); Same quality (Average)
    $1,350,000
  • 13100 Fox Ln Lemont, IL 60439
    5,492 sqft | $328/sqft | built 1998 | 14% smaller (5,492 vs 6,349 sqft); Similar age (1998 vs 2000); Lot 17% smaller (85,813 vs 103,150 sqft)
    $1,800,000
  • 13020 Parker Rd Lemont, IL 60439
    6,453 sqft | $186/sqft | built 2000 | Similar size (6,453 vs 6,349 sqft); Built same year (2000); Same quality (Average)
    $1,200,000
  • 14488 Hawthorne Dr Lemont, IL 60439
    5,587 sqft | $181/sqft | built 2002 | 12% smaller (5,587 vs 6,349 sqft); Similar age (2002 vs 2000); Same quality (Average)
    $1,010,010
  • Unknown Unknown
    4,461 sqft | $280/sqft | built 2004 | Similar age (2004 vs 2000); Lot 17% smaller (85,604 vs 103,150 sqft); Same quality (Average)
    $1,250,000

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 65.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,240,000+$492,120+65.8%
2025$747,880$00.0%
2024$747,880$00.0%
2023$747,880−$118,980−13.7%
2022$866,860$00.0%
2021$866,860−$223,570−20.5%
2020$1,090,430——
6-year total+$149,570+13.7%