Cook County Value

414 Una Ave Lemont, IL 60439

3 bed / 2 bath, 1,707 sqft, built 1988, in Lemont. Assessor market value for 2026: $450,010.

Cook County account 22294190260000

Assessor market value
$450,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,707 sqft
$264 per sqft
Year built
1988
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 18.4% from $380,000 in 2025 to $450,010 in 2026.
  • Assessor market value per square footThe current public record shows about $264 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.

  • 1159 Country Ln Lemont, IL 60439
    1,656 sqft | $272/sqft | built 1987 | Similar size (1,656 vs 1,707 sqft); Similar age (1987 vs 1988); Similar lot size (10,850 vs 11,084 sqft)
    $450,000
  • 1143 Glenys Dr Lemont, IL 60439
    1,815 sqft | $275/sqft | built 1985 | 6% larger (1,815 vs 1,707 sqft); Similar age (1985 vs 1988); Similar lot size (11,200 vs 11,084 sqft)
    $500,000
  • 807 Hillview Dr Lemont, IL 60439
    1,758 sqft | $250/sqft | built 1978 | Similar size (1,758 vs 1,707 sqft); Similar lot size (10,855 vs 11,084 sqft); Same quality (Average)
    $440,000
  • 521 Keepataw Dr Lemont, IL 60439
    1,767 sqft | $276/sqft | built 1985 | Similar size (1,767 vs 1,707 sqft); Similar age (1985 vs 1988); Similar lot size (10,200 vs 11,084 sqft)
    $488,200
  • 530 Keepataw Dr Lemont, IL 60439
    1,720 sqft | $273/sqft | built 1985 | Similar size (1,720 vs 1,707 sqft); Similar age (1985 vs 1988); Lot 10% smaller (9,968 vs 11,084 sqft)
    $470,000

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 18.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$450,010+$70,010+18.4%
2025$380,000$00.0%
2024$380,000$00.0%
2023$380,000+$98,280+34.9%
2022$281,720−$16,360−5.5%
2021$298,080+$100.0%
2020$298,070——
6-year total+$151,940+51.0%