Cook County Value

11 Kettering Ln Lemont, IL 60439

3 bed / 1 bath, 1,247 sqft, built 1956, in Lemont. Assessor market value for 2026: $380,010.

Cook County account 22291090390000

Assessor market value
$380,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,247 sqft
$305 per sqft
Year built
1956
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 41.7% from $268,130 in 2025 to $380,010 in 2026.
  • Assessor market value per square footThe current public record shows about $305 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 1,277 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 +25.5% on average.

Comparable assessments

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

  • 15 Povalish Ct Lemont, IL 60439
    1,214 sqft | $344/sqft | built 1955 | Similar size (1,214 vs 1,247 sqft); Similar age (1955 vs 1956); Similar lot size (8,946 vs 8,820 sqft)
    $418,000
  • 406 Singer Ave Lemont, IL 60439
    1,195 sqft | $285/sqft | built 1958 | Similar size (1,195 vs 1,247 sqft); Similar age (1958 vs 1956); Similar lot size (8,520 vs 8,820 sqft)
    $340,000
  • 3 Kettering Ln Lemont, IL 60439
    1,288 sqft | $287/sqft | built 1956 | Similar size (1,288 vs 1,247 sqft); Built same year (1956); Similar lot size (9,450 vs 8,820 sqft)
    $370,000
  • 513 Walnut Cir Lemont, IL 60439
    1,232 sqft | $276/sqft | built 1960 | Similar size (1,232 vs 1,247 sqft); Similar age (1960 vs 1956); Similar lot size (9,585 vs 8,820 sqft)
    $340,000
  • 17 Norton Ave Lemont, IL 60439
    1,187 sqft | $270/sqft | built 1960 | Similar size (1,187 vs 1,247 sqft); Similar age (1960 vs 1956); Similar lot size (8,500 vs 8,820 sqft)
    $320,010

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 41.7% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$380,010+$111,880+41.7%
2025$268,130−$16,200−5.7%
2024$284,330−$15,680−5.2%
2023$300,010+$71,940+31.5%
2022$228,070$00.0%
2021$228,070+$100.0%
2020$228,060——
6-year total+$151,950+66.6%