Cook County Value

707 Porter St Lemont, IL 60439

3 bed / 1 bath, 1,148 sqft, built 1871, in Lemont. Assessor market value for 2026: $250,000.

Cook County account 22204310090000

Assessor market value
$250,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,148 sqft
$218 per sqft
Year built
1871
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 increased 19.0% from $210,000 in 2025 to $250,000 in 2026.
  • Assessor market value per square footThe current public record shows about $218 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.

  • 43 Cass St Lemont, IL 60439
    1,129 sqft | $248/sqft | built 1881 | Similar size (1,129 vs 1,148 sqft); Similar lot size (4,290 vs 4,650 sqft); Same quality (Average)
    $280,000
  • 404 E Illinois St Lemont, IL 60439
    1,135 sqft | $194/sqft | built 1883 | Similar size (1,135 vs 1,148 sqft); Lot 11% smaller (4,140 vs 4,650 sqft); Same quality (Average)
    $220,010
  • 308 E Illinois St Lemont, IL 60439
    1,243 sqft | $177/sqft | built 1883 | 8% larger (1,243 vs 1,148 sqft); Lot 14% larger (5,288 vs 4,650 sqft); Same quality (Average)
    $220,000
  • 412 Porter St Lemont, IL 60439
    1,286 sqft | $226/sqft | built 1877 | 12% larger (1,286 vs 1,148 sqft); Lot 18% larger (5,500 vs 4,650 sqft); Same quality (Average)
    $290,010
  • 31 Stephen St Lemont, IL 60439
    1,088 sqft | $230/sqft | built 1886 | 5% smaller (1,088 vs 1,148 sqft); Lot 19% smaller (3,750 vs 4,650 sqft); Same quality (Average)
    $250,000

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 19.0% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$250,000+$40,000+19.0%
2025$210,000$00.0%
2024$210,000$00.0%
2023$210,000+$52,400+33.2%
2022$157,600$00.0%
2021$157,600+$200.0%
2020$157,580——
6-year total+$92,420+58.6%