Cook County Value

521 McCarthy Rd Lemont, IL 60439

2 bed / 1 bath, 983 sqft, built 1897, in Lemont. Assessor market value for 2026: $350,000.

Cook County account 22204360310000

Assessor market value
$350,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
983 sqft
$356 per sqft
Year built
1897
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 40.0% from $250,000 in 2025 to $350,000 in 2026.
  • Assessor market value per square footThe current public record shows about $356 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

Similar public appraisal records selected for this property's equity comparison.

  • 711 Hickory St Lemont, IL 60439
    997 sqft | $211/sqft | built 1893 | Similar size (997 vs 983 sqft); Similar age (1893 vs 1897); Similar lot size (6,240 vs 5,952 sqft)
    $210,000
  • 16022 W New Ave Lemont, IL 60439
    1,024 sqft | $322/sqft | built 1893 | Similar size (1,024 vs 983 sqft); Similar age (1893 vs 1897); Similar lot size (5,888 vs 5,952 sqft)
    $330,000
  • 715 East St Lemont, IL 60439
    935 sqft | $257/sqft | built 1891 | Similar size (935 vs 983 sqft); Similar lot size (5,808 vs 5,952 sqft); Same quality (Average)
    $240,000
  • 15964 New Ave Lemont, IL 60439
    952 sqft | $326/sqft | built 1906 | Similar size (952 vs 983 sqft); Similar lot size (5,765 vs 5,952 sqft); Same quality (Average)
    $310,000
  • 21 E Logan St Lemont, IL 60439
    988 sqft | $253/sqft | built 1908 | Similar size (988 vs 983 sqft); Similar lot size (6,350 vs 5,952 sqft); Same quality (Average)
    $250,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 16004 New Ave Lemont, IL 60439
    1,037 sqft | $241/sqft | built 1893 | 6% size difference (1,037 sqft); Moderate age difference (4 years older); Within 1 bedroom (3 vs 2)
    $250,000

Public appraisal comparison for 2026. Prepared . Appraisal source: Cook County Assessor's Office. Sales data checked in this snapshot: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 40.0% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$350,000+$100,000+40.0%
2025$250,000$00.0%
2024$250,000$00.0%
2023$250,000+$82,090+48.9%
2022$167,910$00.0%
2021$167,910+$100.0%
2020$167,900——
6-year total+$182,100+108.5%