Cook County Value

1115 W Cossitt Ave, La Grange, IL 60525

8 bed / 2 bath, 3,402 sqft, built 1929, in Lyons. Assessor market value for 2026: $900,000.

Cook County account 18052230030000

In line with similar homes

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

Assessor market value$900,000
Similar homes$1,320,520
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
$900,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,402 sqft
$265 per sqft
Year built
1929
Average quality

What we found

Similar homes' assessments

Weak

1 of 8 similar homes is assessed lower per square foot. Their similarity-weighted median is $385.95/sqft, but land is valued apart from the home, and some of them have less land value per square foot of home than yours, which counts as $136,500. Counting your land in place of theirs where theirs is less, they support a value of $1,320,520.

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 60525 and Lyons assessment pages.

Local guide: Lyons Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Lyons, appeals to the Assessor closed . Board of Review dates for Lyons 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 30.4% from $690,000 in 2025 to $900,000 in 2026.
  • Assessor market value per square footThe current public record shows about $265 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Lyons neighborhood and ZIP 60525.
  • Neighborhood value signalAmong 932 residential records in the same neighborhood, the average assessor market value is about $390 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +32.9% on average.

Comparable assessments

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

  • 225 S Stone Ave, La Grange, IL 60525
    3,472 sqft | $386/sqft | built 1923 | Similar size (3,472 vs 3,402 sqft); Similar lot size (10,125 vs 10,500 sqft); Same quality (Average)
    $1,340,010
  • 240 S Park Rd, La Grange, IL 60525
    3,218 sqft | $348/sqft | built 1926 | 5% smaller (3,218 vs 3,402 sqft); Similar age (1926 vs 1929); Similar lot size (11,250 vs 10,500 sqft)
    $1,120,000
  • 103 Sunset Ave, La Grange, IL 60525
    3,399 sqft | $394/sqft | built 1930 | Similar size (3,399 vs 3,402 sqft); Similar age (1930 vs 1929); Lot 14% larger (12,000 vs 10,500 sqft)
    $1,340,000
  • 114 Blackstone Ave, La Grange, IL 60525
    3,386 sqft | $260/sqft | built 1925 | Similar size (3,386 vs 3,402 sqft); Similar age (1925 vs 1929); Lot 14% larger (12,000 vs 10,500 sqft)
    $880,000
  • 315 S Park Rd, La Grange, IL 60525
    3,594 sqft | $373/sqft | built 1923 | 6% larger (3,594 vs 3,402 sqft); Similar lot size (11,250 vs 10,500 sqft); Same quality (Average)
    $1,340,000

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

Up 30.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$900,000+$210,000+30.4%
2025$690,000$00.0%
2024$690,000$00.0%
2023$690,000+$155,270+29.0%
2022$534,730$00.0%
2021$534,730−$16,990−3.1%
2020$551,720——
6-year total+$348,280+63.1%