Cook County Value

20 W Custer St Lemont, IL 60439

4 bed / 2 bath, 1,526 sqft, built 1967, in Lemont. Assessor market value for 2026: $420,000.

Cook County account 22291250100000

In line with similar homes

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

Assessor market value$420,000
Similar homes$427,753
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
$420,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,526 sqft
$275 per sqft
Year built
1967
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 $279.95/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 $85,750. Counting your land in place of theirs where theirs is less, they support a value of $427,753.

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 25.6% from $334,410 in 2025 to $420,000 in 2026.
  • Assessor market value per square footThe current public record shows about $275 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

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

  • 10 W Custer St Lemont, IL 60439
    1,536 sqft | $280/sqft | built 1969 | Similar size (1,536 vs 1,526 sqft); Similar age (1969 vs 1967); Similar lot size (9,800 vs 9,800 sqft)
    $430,000
  • 5 W Eureka Ave Lemont, IL 60439
    1,557 sqft | $263/sqft | built 1968 | Similar size (1,557 vs 1,526 sqft); Similar age (1968 vs 1967); Similar lot size (9,645 vs 9,800 sqft)
    $410,000
  • 16 W Logan St Lemont, IL 60439
    1,551 sqft | $303/sqft | built 1967 | Similar size (1,551 vs 1,526 sqft); Built same year (1967); Similar lot size (10,500 vs 9,800 sqft)
    $470,010
  • 13 W Logan St Lemont, IL 60439
    1,504 sqft | $293/sqft | built 1969 | Similar size (1,504 vs 1,526 sqft); Similar age (1969 vs 1967); Similar lot size (10,725 vs 9,800 sqft)
    $440,000
  • 20 W Logan St Lemont, IL 60439
    1,503 sqft | $279/sqft | built 1967 | Similar size (1,503 vs 1,526 sqft); Built same year (1967); Similar lot size (10,500 vs 9,800 sqft)
    $420,010

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 25.6% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$420,000+$85,590+25.6%
2025$334,410−$15,590−4.5%
2024$350,000$00.0%
2023$350,000+$115,480+49.2%
2022$234,520$00.0%
2021$234,520$00.0%
2020$234,520——
6-year total+$185,480+79.1%