Cook County Value

13787 Derby Rd Lemont, IL 60439

4 bed / 2 bath, 4,024 sqft, built 1996, in Lemont. Assessor market value for 2026: $850,000.

Cook County account 22343020080000

In line with similar homes

8 similar homes nearby support a value at or above your county value.

Assessor market value$850,000
Similar homes$928,819
No gap: similar homes are at or above the county value · bars start at $0

How sure: High · 8 similar homes (5 shown below) · public records only

Assessor market value
$850,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
4,024 sqft
$211 per sqft
Year built
1996
Average quality

What we found

Similar homes' assessments

Weak

2 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $225.54/sqft, but land is valued apart from the home, and some of them have less land value per square foot of home than yours, which counts as $337,590. Counting your land in place of theirs where theirs is less, they support a value of $928,819.

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 28.8% from $660,000 in 2025 to $850,000 in 2026.
  • Assessor market value per square footThe current public record shows about $211 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 2,806 residential records in the same neighborhood, the average assessor market value is about $255 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +30.4% on average.

Comparable assessments

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

  • 13 Woodland Dr Lemont, IL 60439
    4,100 sqft | $200/sqft | built 1990 | Similar size (4,100 vs 4,024 sqft); Similar lot size (43,298 vs 43,560 sqft); Same quality (Average)
    $820,000
  • 13203 Red Dr Lemont, IL 60439
    4,026 sqft | $244/sqft | built 1987 | Similar size (4,026 vs 4,024 sqft); Similar lot size (41,726 vs 43,560 sqft); Same quality (Average)
    $983,000
  • 9 Woodland Dr Lemont, IL 60439
    4,104 sqft | $202/sqft | built 1990 | Similar size (4,104 vs 4,024 sqft); Similar lot size (43,821 vs 43,560 sqft); Same quality (Average)
    $830,000
  • 12547 S Archer Ave Lemont, IL 60439
    3,966 sqft | $232/sqft | built 2001 | Similar size (3,966 vs 4,024 sqft); Similar age (2001 vs 1996); Similar lot size (46,478 vs 43,560 sqft)
    $920,010
  • 1330 Gordon Ln Lemont, IL 60439
    4,061 sqft | $214/sqft | built 1993 | Similar size (4,061 vs 4,024 sqft); Similar age (1993 vs 1996); Similar lot size (40,467 vs 43,560 sqft)
    $870,000

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 28.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$850,000+$190,000+28.8%
2025$660,000$00.0%
2024$660,000$00.0%
2023$660,000+$135,050+25.7%
2022$524,950$00.0%
2021$524,950$00.0%
2020$524,950——
6-year total+$325,050+61.9%