Cook County Value

55 Brookside Dr Lemont, IL 60439

5 bed / 3 bath, 5,968 sqft, built 2005, in Lemont Assessor market value for 2026: $1,351,000.

Cook County account 22242030090000

Assessor market value
$1,351,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
5,968 sqft
$226 per sqft
Year built
2005
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 changed from $731,000 in 2025 to $1,351,000 in 2026. A change this large often reflects new construction, a reclassification or a record correction, so check it against the county record.
  • Assessor market value per square footThe current public record shows about $226 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 321 residential records in the same neighborhood, the average assessor market value is about $244 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +52.5% on average.

Comparable assessments

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

  • 59 Brookside Dr Lemont, IL 60439
    5,829 sqft | $217/sqft | built 2001 | Similar size (5,829 vs 5,968 sqft); Similar age (2001 vs 2005); Similar lot size (47,567 vs 45,694 sqft)
    $1,265,000
  • 60 Woodview Ln Lemont, IL 60439
    5,732 sqft | $225/sqft | built 2003 | Similar size (5,732 vs 5,968 sqft); Similar age (2003 vs 2005); Similar lot size (45,302 vs 45,694 sqft)
    $1,290,000
  • 46 Rusty Rd Lemont, IL 60439
    5,856 sqft | $181/sqft | built 1996 | Similar size (5,856 vs 5,968 sqft); Similar lot size (46,391 vs 45,694 sqft); Same quality (Average)
    $1,060,000
  • 5 Sorrel Ln Lemont, IL 60439
    6,090 sqft | $215/sqft | built 2002 | Similar size (6,090 vs 5,968 sqft); Similar age (2002 vs 2005); Similar lot size (49,701 vs 45,694 sqft)
    $1,306,980
  • 16 115th St Lemont, IL 60439
    5,959 sqft | $233/sqft | built 2001 | Similar size (5,959 vs 5,968 sqft); Similar age (2001 vs 2005); Similar lot size (42,732 vs 45,694 sqft)
    $1,391,010

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 84.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,351,000+$620,000+84.8%
2025$731,000+$61,000+9.1%
2024$670,000$00.0%
2023$670,000−$6,510−1.0%
2022$676,510$00.0%
2021$676,510−$49,360−6.8%
2020$725,870——
6-year total+$625,130+86.1%