Cook County Value

9134 27th St, Brookfield, IL 60513

3 bed / 1 bath, 1,210 sqft, built 1956, in Proviso. Assessor market value for 2026: $340,000.

Cook County account 15274020400000

Small or uncertain difference

about $600

8 similar homes nearby point to a value about $600 lower than yours, a small or uncertain difference.

Assessor market value$340,000
Similar homes$339,441
$559 gap · bars start at $0

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

Assessor market value
$340,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,210 sqft
$281 per sqft
Year built
1956
Average quality

Why we think so

Similar homes' assessments

Weak

4 of 8 similar homes are assessed lower per square foot. Their similarity-weighted median is $280.53/sqft, which supports a value of $339,441.

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 60513 and Proviso assessment pages.

Local guide: Proviso Township 2026 Property Tax Appeal Guide.

Appeal deadlines

For Proviso, appeals to the Assessor are open through (8 days left).

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 21.4% from $280,000 in 2025 to $340,000 in 2026.
  • Assessor market value per square footThe current public record shows about $281 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Proviso neighborhood and ZIP 60513.
  • Neighborhood value signalAmong 560 residential records in the same neighborhood, the average assessor market value is about $229 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +30.7% on average.

Comparable assessments

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

  • 9118 30th St, Brookfield, IL 60513
    1,212 sqft | $281/sqft | built 1957 | Similar size (1,212 vs 1,210 sqft); Similar age (1957 vs 1956); Similar lot size (9,081 vs 8,553 sqft)
    $340,000
  • 9106 26th Pl, Brookfield, IL 60513
    1,200 sqft | $258/sqft | built 1952 | Similar size (1,200 vs 1,210 sqft); Similar age (1952 vs 1956); Similar lot size (8,750 vs 8,553 sqft)
    $310,000
  • 9040 26th Pl, Brookfield, IL 60513
    1,164 sqft | $284/sqft | built 1957 | Similar size (1,164 vs 1,210 sqft); Similar age (1957 vs 1956); Similar lot size (8,613 vs 8,553 sqft)
    $330,000
  • 2922 Prairie Ave, Brookfield, IL 60513
    1,176 sqft | $315/sqft | built 1955 | Similar size (1,176 vs 1,210 sqft); Similar age (1955 vs 1956); Similar lot size (8,372 vs 8,553 sqft)
    $370,000
  • 2925 Sunnyside Ave, Brookfield, IL 60513
    1,239 sqft | $258/sqft | built 1953 | Similar size (1,239 vs 1,210 sqft); Similar age (1953 vs 1956); Similar lot size (8,908 vs 8,553 sqft)
    $320,000

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 21.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$340,000+$60,000+21.4%
2025$280,000$00.0%
2024$280,000$00.0%
2023$280,000+$67,110+31.5%
2022$212,890$00.0%
2021$212,890+$100.0%
2020$212,880——
6-year total+$127,120+59.7%