Cook County Value

603 Singer Ave Lemont, IL 60439

4 bed / 2 bath, 2,140 sqft, built 1888, in Lemont. Assessor market value for 2026: $420,000.

Cook County account 22291080010000

Assessor market value
$420,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,140 sqft
$196 per sqft
Year built
1888
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 16.7% from $360,000 in 2025 to $420,000 in 2026.
  • Assessor market value per square footThe current public record shows about $196 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.

  • 502 Singer Ave Lemont, IL 60439
    2,083 sqft | $211/sqft | built 1888 | Similar size (2,083 vs 2,140 sqft); Built same year (1888); Similar lot size (5,641 vs 5,994 sqft)
    $440,000
  • 524 Ledochowski St Lemont, IL 60439
    2,213 sqft | $194/sqft | built 1878 | Similar size (2,213 vs 2,140 sqft); Similar lot size (6,120 vs 5,994 sqft); Same quality (Average)
    $430,000
  • 615 Singer Ave Lemont, IL 60439
    2,375 sqft | $194/sqft | built 1887 | 11% larger (2,375 vs 2,140 sqft); Similar age (1887 vs 1888); Similar lot size (5,994 vs 5,994 sqft)
    $460,000
  • 923 Singer Ave Lemont, IL 60439
    2,025 sqft | $198/sqft | built 1885 | 5% smaller (2,025 vs 2,140 sqft); Similar age (1885 vs 1888); Lot 11% larger (6,660 vs 5,994 sqft)
    $400,010
  • 725 Singer Ave Lemont, IL 60439
    2,212 sqft | $185/sqft | built 1898 | Similar size (2,212 vs 2,140 sqft); Similar lot size (6,349 vs 5,994 sqft); Same quality (Average)
    $410,000

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 16.7% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$420,000+$60,000+16.7%
2025$360,000$00.0%
2024$360,000$00.0%
2023$360,000+$146,980+69.0%
2022$213,020$00.0%
2021$213,020+$200.0%
2020$213,000——
6-year total+$207,000+97.2%