Cook County Value

540 4th St Lemont, IL 60439

3 bed / 1 bath, 1,650 sqft, built 1977, in Lemont. Assessor market value for 2026: $430,000.

Cook County account 22281040450000

Assessor market value
$430,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,650 sqft
$261 per sqft
Year built
1977
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 22.9% from $350,000 in 2025 to $430,000 in 2026.
  • Assessor market value per square footThe current public record shows about $261 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 858 residential records in the same neighborhood, the average assessor market value is about $264 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +21.4% on average.

Comparable assessments

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

  • 26 Keepataw Ct Lemont, IL 60439
    1,540 sqft | $305/sqft | built 1978 | 7% smaller (1,540 vs 1,650 sqft); Similar age (1978 vs 1977); Similar lot size (18,462 vs 19,734 sqft)
    $470,000
  • 11 Country Ct Lemont, IL 60439
    1,654 sqft | $278/sqft | built 1987 | Similar size (1,654 vs 1,650 sqft); Lot 12% smaller (17,290 vs 19,734 sqft); Same quality (Average)
    $460,000
  • 1026 Forest Ln Lemont, IL 60439
    1,560 sqft | $301/sqft | built 1977 | 6% smaller (1,560 vs 1,650 sqft); Built same year (1977); Lot 13% smaller (17,093 vs 19,734 sqft)
    $470,000
  • 590 4th St Lemont, IL 60439
    1,640 sqft | $299/sqft | built 1990 | Similar size (1,640 vs 1,650 sqft); Lot 15% larger (22,724 vs 19,734 sqft); Same quality (Average)
    $490,010
  • 1166 Mc Carthy Rd Lemont, IL 60439
    1,797 sqft | $250/sqft | built 1976 | 9% larger (1,797 vs 1,650 sqft); Similar age (1976 vs 1977); Lot 17% larger (23,098 vs 19,734 sqft)
    $450,000

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 22.9% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$430,000+$80,000+22.9%
2025$350,000$00.0%
2024$350,000$00.0%
2023$350,000+$109,480+45.5%
2022$240,520$00.0%
2021$240,520+$100.0%
2020$240,510——
6-year total+$189,490+78.8%