Cook County Value

11621 Archer Ave Lemont, IL 60439

2 bed / 1 bath, 898 sqft, built 1956, in Lemont. Assessor market value for 2026: $270,000.

Cook County account 22233030040000

Assessor market value
$270,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
898 sqft
$301 per sqft
Year built
1956
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 17.4% from $230,000 in 2025 to $270,000 in 2026.
  • Assessor market value per square footThe current public record shows about $301 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 858 residential records in the same neighborhood, the average assessor market value is about $264 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +21.4% on average.

Comparable assessments

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

  • 669 1st St Lemont, IL 60439
    1,008 sqft | $317/sqft | built 1955 | 12% larger (1,008 vs 898 sqft); Similar age (1955 vs 1956); Similar lot size (19,734 vs 21,780 sqft)
    $320,000
  • 655 1st St Lemont, IL 60439
    1,066 sqft | $281/sqft | built 1954 | Similar age (1954 vs 1956); Similar lot size (19,734 vs 21,780 sqft); Same quality (Average)
    $300,000
  • 489 5th St Lemont, IL 60439
    1,081 sqft | $287/sqft | built 1958 | Similar age (1958 vs 1956); Similar lot size (20,226 vs 21,780 sqft); Same quality (Average)
    $310,000
  • 675 1st St Lemont, IL 60439
    1,094 sqft | $256/sqft | built 1951 | Similar age (1951 vs 1956); Similar lot size (19,734 vs 21,780 sqft); Same quality (Average)
    $280,000
  • 467 5th St Lemont, IL 60439
    1,164 sqft | $266/sqft | built 1955 | Similar age (1955 vs 1956); Similar lot size (21,164 vs 21,780 sqft); Same quality (Average)
    $310,000

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 17.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$270,000+$40,000+17.4%
2025$230,000$00.0%
2024$230,000−$26,570−10.4%
2023$256,570+$82,530+47.4%
2022$174,040$00.0%
2021$174,040+$200.0%
2020$174,020——
6-year total+$95,980+55.2%