Cook County Value

702 Porter St Lemont, IL 60439

4 bed / 2 bath, 2,085 sqft, built 1929, in Lemont. Assessor market value for 2026: $490,000.

Cook County account 22204380020000

In line with similar homes

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

Assessor market value$490,000
Similar homes$495,375
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
$490,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,085 sqft
$235 per sqft
Year built
1929
Average quality

What we found

Similar homes' assessments

Weak

4 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $237.59/sqft, which supports a value of $495,375.

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 36.1% from $360,000 in 2025 to $490,000 in 2026.
  • Assessor market value per square footThe current public record shows about $235 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 1,277 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 +25.5% on average.

Comparable assessments

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

  • 610 E Illinois St Lemont, IL 60439
    1,728 sqft | $208/sqft | built 1933 | Similar age (1933 vs 1929); Similar lot size (4,600 vs 4,650 sqft); Same quality (Average)
    $360,000
  • 708 Porter St Lemont, IL 60439
    1,664 sqft | $246/sqft | built 1921 | Similar lot size (4,650 vs 4,650 sqft); Same quality (Average); Same bed/bath (4/2)
    $410,000
  • 700 E Illinois St Lemont, IL 60439
    1,588 sqft | $258/sqft | built 1923 | Similar lot size (4,650 vs 4,650 sqft); Same quality (Average); Same bed/bath (4/2)
    $410,000
  • 706 State St Lemont, IL 60439
    2,021 sqft | $244/sqft | built 1924 | Similar size (2,021 vs 2,085 sqft); Similar age (1924 vs 1929); Same quality (Average)
    $492,720
  • 1007 Singer Ave Lemont, IL 60439
    1,833 sqft | $213/sqft | built 1932 | 12% smaller (1,833 vs 2,085 sqft); Similar age (1932 vs 1929); Lot 20% smaller (3,724 vs 4,650 sqft)
    $390,010

Recent comparable sales

No usable comparable sales are available in this data snapshot.

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 36.1% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$490,000+$130,000+36.1%
2025$360,000+$106,010+41.7%
2024$253,990+$3,990+1.6%
2023$250,000+$101,730+68.6%
2022$148,270$00.0%
2021$148,270+$100.0%
2020$148,260——
6-year total+$341,740+230.5%