Cook County Value

912 Warner Ave Lemont, IL 60439

3 bed / 1 bath, 1,179 sqft, built 1985, in Lemont. Assessor market value for 2026: $370,000.

Cook County account 22291210170000

Likely too high

about $36,000

8 similar homes nearby point to a value about $36,000 lower than yours.

Assessor market value$370,000
Similar homes$334,046
$35,954 gap · bars start at $0

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

Assessor market value
$370,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,179 sqft
$314 per sqft
Year built
1985
Average quality

Why we think so

Similar homes' assessments

Strong

6 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $283.33/sqft, which supports a value of $334,046.

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 12.1% from $330,000 in 2025 to $370,000 in 2026.
  • Assessor market value per square footThe current public record shows about $314 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

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

  • 924 Warner Ave Lemont, IL 60439
    1,183 sqft | $355/sqft | built 1990 | Similar size (1,183 vs 1,179 sqft); Similar age (1990 vs 1985); Similar lot size (7,250 vs 7,250 sqft)
    $420,000
  • 402 Stephen St Lemont, IL 60439
    1,155 sqft | $277/sqft | built 1989 | Similar size (1,155 vs 1,179 sqft); Similar age (1989 vs 1985); Similar lot size (6,996 vs 7,250 sqft)
    $320,010
  • 725 Ledochowski St Lemont, IL 60439
    1,187 sqft | $278/sqft | built 1987 | Similar size (1,187 vs 1,179 sqft); Similar age (1987 vs 1985); Similar lot size (6,600 vs 7,250 sqft)
    $330,000
  • 720 East St Lemont, IL 60439
    1,187 sqft | $286/sqft | built 1987 | Similar size (1,187 vs 1,179 sqft); Similar age (1987 vs 1985); Lot 14% smaller (6,240 vs 7,250 sqft)
    $340,000
  • 226 S Main St Lemont, IL 60439
    1,163 sqft | $318/sqft | built 1980 | Similar size (1,163 vs 1,179 sqft); Similar age (1980 vs 1985); Similar lot size (7,800 vs 7,250 sqft)
    $370,000

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 12.1% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$370,000+$40,000+12.1%
2025$330,000$00.0%
2024$330,000$00.0%
2023$330,000+$115,520+53.9%
2022$214,480$00.0%
2021$214,480+$200.0%
2020$214,460——
6-year total+$155,540+72.5%