Cook County Value

21129 Dettmering Dr, Matteson, IL 60443

4 bed / 1 bath, 1,982 sqft, built 1950, in Rich. Assessor market value for 2025: $180,000.

Cook County account 31234020060000

Assessor market value
$180,000
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,982 sqft
$91 per sqft
Year built
1950
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 60443 and Rich assessment pages.

Appeal deadlines

Rich 2026 appeal dates 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 $180,000 in 2024 to $180,000 in 2025.
  • Assessor market value per square footThe current public record shows about $91 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Rich neighborhood and ZIP 60443.
  • Neighborhood value signalAmong 973 residential records in the same neighborhood, the average assessor market value is about $114 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values stayed about flat on average.

Comparable assessments

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

  • 3845 216th Pl, Matteson, IL 60443
    2,019 sqft | $104/sqft | built 1948 | Similar size (2,019 vs 1,982 sqft); Similar age (1948 vs 1950); Lot 13% smaller (7,808 vs 9,000 sqft)
    $210,000
  • 22412 Lawndale Ave Richton Park, IL 60471
    2,074 sqft | $90/sqft | built 1955 | Similar size (2,074 vs 1,982 sqft); Similar age (1955 vs 1950); Lot 11% smaller (7,980 vs 9,000 sqft)
    $187,470
  • 21149 Oak St, Matteson, IL 60443
    2,016 sqft | $104/sqft | built 1953 | Similar size (2,016 vs 1,982 sqft); Similar age (1953 vs 1950); Lot 18% smaller (7,350 vs 9,000 sqft)
    $210,000
  • 3809 216th Pl, Matteson, IL 60443
    1,878 sqft | $91/sqft | built 1948 | 5% smaller (1,878 vs 1,982 sqft); Similar age (1948 vs 1950); Lot 11% smaller (8,050 vs 9,000 sqft)
    $170,000
  • 3545 213th Pl, Matteson, IL 60443
    2,142 sqft | $84/sqft | built 1950 | 8% larger (2,142 vs 1,982 sqft); Built same year (1950); Lot 12% smaller (7,920 vs 9,000 sqft)
    $180,000

Recent comparable sales

No usable comparable sales are available in this data snapshot.

Public appraisal comparison for 2025. 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 2025 from 2024.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2025$180,000$00.0%
2024$180,000$00.0%
2023$180,000+$71,060+65.2%
2022$108,940$00.0%
2021$108,940$00.0%
2020$108,940——
5-year total+$71,060+65.2%