Cook County Value

5 Chestnut Lemont, IL 60439

4 bed / 2 bath, 3,158 sqft, built 1986, in Lemont. Assessor market value for 2026: $770,010.

Cook County account 22251040050000

In line with similar homes

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

Assessor market value$770,010
Similar homes$796,131
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
$770,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,158 sqft
$244 per sqft
Year built
1986

What we found

Similar homes' assessments

Weak

3 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $252.10/sqft, which supports a value of $796,131.

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 39.2% from $553,020 in 2025 to $770,010 in 2026.
  • Assessor market value per square footThe current public record shows about $244 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.

  • 18 Equestrian Way Lemont, IL 60439
    3,094 sqft | $252/sqft | built 1987 | Similar size (3,094 vs 3,158 sqft); Similar age (1987 vs 1986); Similar lot size (44,331 vs 44,052 sqft)
    $780,000
  • 7 Chestnut Lemont, IL 60439
    3,186 sqft | $251/sqft | built 1988 | Similar size (3,186 vs 3,158 sqft); Similar age (1988 vs 1986); Similar lot size (45,084 vs 44,052 sqft)
    $800,010
  • 22 115th St Lemont, IL 60439
    3,236 sqft | $253/sqft | built 1980 | Similar size (3,236 vs 3,158 sqft); Similar lot size (42,732 vs 44,052 sqft); Same bed/bath (4/2)
    $820,010
  • 7 115th St Lemont, IL 60439
    2,997 sqft | $270/sqft | built 1990 | 5% smaller (2,997 vs 3,158 sqft); Similar age (1990 vs 1986); Similar lot size (42,000 vs 44,052 sqft)
    $810,000
  • 2 Chestnut Lemont, IL 60439
    3,492 sqft | $238/sqft | built 1986 | 11% larger (3,492 vs 3,158 sqft); Built same year (1986); Similar lot size (43,529 vs 44,052 sqft)
    $830,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 1238 Acorn St Lemont, IL 60439
    2,802 sqft | $223/sqft | built 1990 | 11% size difference (2,802 sqft); Moderate age difference (4 years newer); Within 1 bedroom (3 vs 4)
    $625,000
  • 11 Cedar Ct Lemont, IL 60439
    2,722 sqft | $253/sqft | built 1990 | 14% size difference (2,722 sqft); Moderate age difference (4 years newer); Same beds (4)
    $690,000
  • 1373 Gordon Ln Lemont, IL 60439
    2,834 sqft | $106/sqft | built 1985 | 10% size difference (2,834 sqft); Similar age (1985); Same beds (4)
    $300,000

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 39.2% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$770,010+$216,990+39.2%
2025$553,020$00.0%
2024$553,020$00.0%
2023$553,020+$145,490+35.7%
2022$407,530$00.0%
2021$407,530$00.0%
2020$407,530——
6-year total+$362,480+88.9%