Cook County Value

6105 Byron St Rosemont, IL 60018

3 bed / 1 bath, 1,324 sqft, built 1960, in Leyden. Assessor market value for 2026: $413,790.

Cook County account 12042120470000

In line with similar homes

8 similar homes nearby support a value at or above your county value.

Assessor market value$413,790
Similar homes$419,999
No gap: similar homes are at or above the county value · bars start at $0

How sure: High · 8 similar homes (5 shown below) · public records only

Assessor market value
$413,790
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,324 sqft
$313 per sqft
Year built
1960
Average quality

What we found

Similar homes' assessments

Weak

4 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $317.22/sqft, which supports a value of $419,999.

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 decreased 6.0% from $440,000 in 2025 to $413,790 in 2026.
  • Assessor market value per square footThe current public record shows about $313 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.

  • 6113 Byron St Rosemont, IL 60018
    1,324 sqft | $325/sqft | built 1961 | Similar size (1,324 vs 1,324 sqft); Similar age (1961 vs 1960); Similar lot size (6,150 vs 6,150 sqft)
    $430,000
  • 6216 N Scott St Rosemont, IL 60018
    1,324 sqft | $317/sqft | built 1960 | Similar size (1,324 vs 1,324 sqft); Built same year (1960); Similar lot size (6,300 vs 6,150 sqft)
    $420,000
  • 6212 N Scott St Rosemont, IL 60018
    1,323 sqft | $325/sqft | built 1960 | Similar size (1,323 vs 1,324 sqft); Built same year (1960); Similar lot size (6,300 vs 6,150 sqft)
    $430,000
  • 6217 Kirschoff Rd Rosemont, IL 60018
    1,323 sqft | $310/sqft | built 1962 | Similar size (1,323 vs 1,324 sqft); Similar age (1962 vs 1960); Similar lot size (6,300 vs 6,150 sqft)
    $410,000
  • 6208 N Scott St Rosemont, IL 60018
    1,304 sqft | $322/sqft | built 1960 | Similar size (1,304 vs 1,324 sqft); Built same year (1960); Similar lot size (6,300 vs 6,150 sqft)
    $420,000

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

Down 6.0% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$413,790−$26,210−6.0%
2025$440,000−$30,000−6.4%
2024$470,000$00.0%
2023$470,000$00.0%
2022$470,000+$139,500+42.2%
2021$330,500+$200.0%
2020$330,480——
6-year total+$83,310+25.2%