Cook County Value

12820 Artesian St Lemont, IL 60439

4 bed / 1 bath, 1,296 sqft, built 1966, in Lemont. Assessor market value for 2026: $390,000.

Cook County account 22232070050000

Assessor market value
$390,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,296 sqft
$301 per sqft
Year built
1966
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 25.8% from $310,000 in 2025 to $390,000 in 2026.
  • Assessor market value per square footThe current public record shows about $301 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 636 residential records in the same neighborhood, the average assessor market value is about $286 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +33.3% on average.

Comparable assessments

Similar public appraisal records selected for this property's equity comparison.

  • 12823 Artesian St Lemont, IL 60439
    1,302 sqft | $307/sqft | built 1964 | Similar size (1,302 vs 1,296 sqft); Similar age (1964 vs 1966); Similar lot size (22,400 vs 22,421 sqft)
    $400,000
  • 12838 Artesian St Lemont, IL 60439
    1,278 sqft | $321/sqft | built 1970 | Similar size (1,278 vs 1,296 sqft); Similar age (1970 vs 1966); Similar lot size (22,500 vs 22,421 sqft)
    $410,010
  • 12842 Campbell St Lemont, IL 60439
    1,316 sqft | $334/sqft | built 1973 | Similar size (1,316 vs 1,296 sqft); Similar lot size (22,000 vs 22,421 sqft); Same quality (Average)
    $440,000
  • 1297 117th St Lemont, IL 60439
    1,272 sqft | $314/sqft | built 1973 | Similar size (1,272 vs 1,296 sqft); Similar lot size (22,000 vs 22,421 sqft); Same quality (Average)
    $400,000
  • 1335 Oak Ave Lemont, IL 60439
    1,288 sqft | $287/sqft | built 1961 | Similar size (1,288 vs 1,296 sqft); Similar age (1961 vs 1966); Similar lot size (23,783 vs 22,421 sqft)
    $370,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 545 4th St Lemont, IL 60439
    1,274 sqft | $373/sqft | built 1975 | Similar size (1,274 sqft); Moderate age difference (9 years newer); Within 1 bedroom (3 vs 4)
    $475,000
  • 1030 Crestview Dr Lemont, IL 60439
    1,364 sqft | $183/sqft | built 1966 | 5% size difference (1,364 sqft); Similar age (1966); Within 1 bedroom (3 vs 4)
    $250,000

Public appraisal comparison for 2026. Prepared . Appraisal source: Cook County Assessor's Office. Sales data checked in this snapshot: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Up 25.8% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$390,000+$80,000+25.8%
2025$310,000$00.0%
2024$310,000$00.0%
2023$310,000+$86,710+38.8%
2022$223,290$00.0%
2021$223,290$00.0%
2020$223,290——
6-year total+$166,710+74.7%