Cook County Value

1430 Oak Ave Lemont, IL 60439

3 bed / 1 bath, 1,350 sqft, built 1956, in Lemont. Assessor market value for 2026: $390,010.

Cook County account 22271000240000

Assessor market value
$390,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,350 sqft
$289 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 44.5% from $269,930 in 2025 to $390,010 in 2026.
  • Assessor market value per square footThe current public record shows about $289 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 636 residential records in the same neighborhood, the average assessor market value is about $286 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +33.3% on average.

Comparable assessments

Similar public appraisal records selected for this property's equity comparison.

  • 114 Apple St Lemont, IL 60439
    1,328 sqft | $309/sqft | built 1960 | Similar size (1,328 vs 1,350 sqft); Similar age (1960 vs 1956); Lot 18% larger (53,927 vs 45,738 sqft)
    $410,000
  • 11535 Walker Rd Lemont, IL 60439
    1,232 sqft | $448/sqft | built 1952 | 9% smaller (1,232 vs 1,350 sqft); Similar age (1952 vs 1956); Lot 14% larger (52,215 vs 45,738 sqft)
    $551,880
  • 12150 Walker Rd Lemont, IL 60439
    1,338 sqft | $291/sqft | built 1956 | Similar size (1,338 vs 1,350 sqft); Built same year (1956); Same quality (Average)
    $390,000
  • 11270 Bell Rd Lemont, IL 60439
    1,387 sqft | $260/sqft | built 1958 | Similar size (1,387 vs 1,350 sqft); Similar age (1958 vs 1956); Same quality (Average)
    $360,000
  • 108 Apple St Lemont, IL 60439
    1,305 sqft | $314/sqft | built 1970 | Similar size (1,305 vs 1,350 sqft); Lot 18% larger (53,927 vs 45,738 sqft); Same quality (Average)
    $410,000

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: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 44.5% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$390,010+$120,080+44.5%
2025$269,930$00.0%
2024$269,930−$128,060−32.2%
2023$397,990+$172,420+76.4%
2022$225,570$00.0%
2021$225,570$00.0%
2020$225,570——
6-year total+$164,440+72.9%