Cook County Value

1134 Florence St Lemont, IL 60439

4 bed / 1 bath, 2,574 sqft, built 1989, in Lemont. Assessor market value for 2026: $520,010.

Cook County account 22293200040000

Assessor market value
$520,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,574 sqft
$202 per sqft
Year built
1989
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 20.9% from $430,000 in 2025 to $520,010 in 2026.
  • Assessor market value per square footThe current public record shows about $202 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 437 residential records in the same neighborhood, the average assessor market value is about $261 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +25.7% on average.

Comparable assessments

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

  • 1128 Florence St Lemont, IL 60439
    2,544 sqft | $228/sqft | built 1990 | Similar size (2,544 vs 2,574 sqft); Similar age (1990 vs 1989); Similar lot size (10,540 vs 10,540 sqft)
    $580,010
  • 1 Cedar Ct Lemont, IL 60439
    2,572 sqft | $214/sqft | built 1985 | Similar size (2,572 vs 2,574 sqft); Similar age (1985 vs 1989); Similar lot size (10,260 vs 10,540 sqft)
    $550,010
  • 1139 Walter St Lemont, IL 60439
    2,552 sqft | $204/sqft | built 1989 | Similar size (2,552 vs 2,574 sqft); Built same year (1989); Lot 12% smaller (9,225 vs 10,540 sqft)
    $520,000
  • 20 Evergreen Pl Lemont, IL 60439
    2,465 sqft | $227/sqft | built 1988 | Similar size (2,465 vs 2,574 sqft); Similar age (1988 vs 1989); Similar lot size (10,039 vs 10,540 sqft)
    $560,000
  • 50 Roberta St Lemont, IL 60439
    2,570 sqft | $226/sqft | built 1989 | Similar size (2,570 vs 2,574 sqft); Built same year (1989); Lot 10% larger (11,622 vs 10,540 sqft)
    $580,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 1238 Acorn St Lemont, IL 60439
    2,802 sqft | $223/sqft | built 1990 | 9% size difference (2,802 sqft); Similar age (1990); Within 1 bedroom (3 vs 4)
    $625,000
  • 11 Cedar Ct Lemont, IL 60439
    2,722 sqft | $253/sqft | built 1990 | 6% size difference (2,722 sqft); Similar age (1990); Same beds (4)
    $690,000

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 20.9% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$520,010+$90,010+20.9%
2025$430,000$00.0%
2024$430,000$00.0%
2023$430,000+$116,010+36.9%
2022$313,990$00.0%
2021$313,990+$200.0%
2020$313,970——
6-year total+$206,040+65.6%