Cook County Value

45 Dineff Rd Lemont, IL 60439

4 bed / 2 bath, 3,822 sqft, built 1998, in Lemont. Assessor market value for 2026: $910,010.

Cook County account 22241010170000

Assessor market value
$910,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,822 sqft
$238 per sqft
Year built
1998
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 $561,850 in 2025 to $910,010 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 $238 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

Showing 5 of the 8 similar homes in this property's equity comparison, from public appraisal records.

  • 32 115th St Lemont, IL 60439
    3,800 sqft | $297/sqft | built 1999 | Similar size (3,800 vs 3,822 sqft); Similar age (1999 vs 1998); Similar lot size (41,251 vs 39,988 sqft)
    $1,127,000
  • 55 Dineff Rd Lemont, IL 60439
    3,749 sqft | $293/sqft | built 2001 | Similar size (3,749 vs 3,822 sqft); Similar age (2001 vs 1998); Similar lot size (39,988 vs 39,988 sqft)
    $1,100,010
  • 59 Rusty Rd Lemont, IL 60439
    3,688 sqft | $249/sqft | built 1991 | Similar size (3,688 vs 3,822 sqft); Similar lot size (41,120 vs 39,988 sqft); Same quality (Average)
    $920,000
  • 6 Timberview Lemont, IL 60439
    3,700 sqft | $238/sqft | built 1996 | Similar size (3,700 vs 3,822 sqft); Similar age (1996 vs 1998); Similar lot size (41,991 vs 39,988 sqft)
    $880,000
  • 57 Stone Creek Dr Lemont, IL 60439
    3,696 sqft | $235/sqft | built 1990 | Similar size (3,696 vs 3,822 sqft); Similar lot size (40,297 vs 39,988 sqft); Same quality (Average)
    $868,500

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 62.0% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$910,010+$348,160+62.0%
2025$561,850−$53,120−8.6%
2024$614,970−$79,990−11.5%
2023$694,960+$81,650+13.3%
2022$613,310$00.0%
2021$613,310+$200.0%
2020$613,290——
6-year total+$296,720+48.4%