Cook County Value

13485 Maple Ave Lemont, IL 60439

3 bed / 1 bath, 1,150 sqft, built 1960, in Lemont Assessor market value for 2026: $450,000.

Cook County account 22334050080000

Assessor market value
$450,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,150 sqft
$391 per sqft
Year built
1960
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 47.9% from $304,320 in 2025 to $450,000 in 2026.
  • Assessor market value per square footThe current public record shows about $391 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 278 residential records in the same neighborhood, the average assessor market value is about $298 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +39.8% on average.

Comparable assessments

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

  • 13220 Maple Ave Lemont, IL 60439
    1,270 sqft | $409/sqft | built 1951 | 10% larger (1,270 vs 1,150 sqft); Similar lot size (88,426 vs 91,040 sqft); Same quality (Average)
    $520,000
  • 13209 Archer Ave Lemont, IL 60439
    1,315 sqft | $403/sqft | built 1956 | 14% larger (1,315 vs 1,150 sqft); Similar age (1956 vs 1960); Similar lot size (98,663 vs 91,040 sqft)
    $530,000
  • 15864 132nd St Lemont, IL 60439
    1,332 sqft | $353/sqft | built 1957 | Similar age (1957 vs 1960); Similar lot size (99,752 vs 91,040 sqft); Same quality (Average)
    $470,000
  • 13300 Maple Ave Lemont, IL 60439
    1,000 sqft | $430/sqft | built 1952 | 13% smaller (1,000 vs 1,150 sqft); Similar lot size (83,635 vs 91,040 sqft); Same quality (Average)
    $430,000
  • 15730 132nd St Lemont, IL 60439
    1,093 sqft | $293/sqft | built 1952 | Similar size (1,093 vs 1,150 sqft); Same quality (Average); Same neighborhood
    $320,000

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 47.9% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$450,000+$145,680+47.9%
2025$304,320$00.0%
2024$304,320$00.0%
2023$304,320+$66,520+28.0%
2022$237,800$00.0%
2021$237,800$00.0%
2020$237,800——
6-year total+$212,200+89.2%