Cook County Value

9850 Granville Ave Rosemont, IL 60018

3 bed / 1 bath, 1,298 sqft, built 1960, in Leyden. Assessor market value for 2026: $420,000.

Cook County account 12042080600000

Assessor market value
$420,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,298 sqft
$324 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 60018 and Leyden assessment pages.

Local guide: Leyden Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Leyden, appeals to the Assessor closed . Board of Review dates for Leyden 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 stayed about the same, from $420,000 in 2025 to $420,000 in 2026.
  • Assessor market value per square footThe current public record shows about $324 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Leyden neighborhood and ZIP 60018.
  • Neighborhood value signalAmong 503 residential records in the same neighborhood, the average assessor market value is about $240 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -1.8% on average.

Comparable assessments

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

  • 10008 Norwood St Rosemont, IL 60018
    1,300 sqft | $331/sqft | built 1961 | Similar size (1,300 vs 1,298 sqft); Similar age (1961 vs 1960); Similar lot size (7,608 vs 7,380 sqft)
    $430,000
  • 6224 N Hawthorne St Rosemont, IL 60018
    1,320 sqft | $343/sqft | built 1957 | Similar size (1,320 vs 1,298 sqft); Similar age (1957 vs 1960); Similar lot size (7,380 vs 7,380 sqft)
    $453,120
  • 6020 Byron St Rosemont, IL 60018
    1,311 sqft | $333/sqft | built 1958 | Similar size (1,311 vs 1,298 sqft); Similar age (1958 vs 1960); Similar lot size (7,062 vs 7,380 sqft)
    $436,060
  • 10000 Norwood St Rosemont, IL 60018
    1,358 sqft | $346/sqft | built 1960 | Similar size (1,358 vs 1,298 sqft); Built same year (1960); Similar lot size (7,266 vs 7,380 sqft)
    $470,000
  • 10025 Estelle Dr Rosemont, IL 60018
    1,309 sqft | $304/sqft | built 1961 | Similar size (1,309 vs 1,298 sqft); Similar age (1961 vs 1960); Similar lot size (6,795 vs 7,380 sqft)
    $397,900

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

No change 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$00.0%
2025$420,000−$10,000−2.3%
2024$430,000$00.0%
2023$430,000$00.0%
2022$430,000+$108,250+33.6%
2021$321,750$00.0%
2020$321,750——
6-year total+$98,250+30.5%