Cook County Value

10521 S Prospect Ave, Chicago, IL 60643

4 bed / 2 bath, 1,700 sqft, built 1914, in Lake. Assessor market value for 2025: $300,000.

Cook County account 25171110050000

Small or uncertain difference

about $4,000

8 similar homes nearby point to a value about $4,000 lower than yours, a small or uncertain difference.

Assessor market value$300,000
Similar homes$295,817
$4,183 gap · bars start at $0

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

Assessor market value
$300,000
Tax year 2025 · before exemptions; the assessed value on your notice is 10% of it
Living area
1,700 sqft
$176 per sqft
Year built
1914
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 $174.01/sqft, which supports a value of $295,817.

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 60643 and Lake assessment pages.

Appeal deadlines

For Lake, appeals to the Assessor are open through (10 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 stayed about the same, from $300,000 in 2024 to $300,000 in 2025.
  • Assessor market value per square footThe current public record shows about $176 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Lake neighborhood and ZIP 60643.
  • Neighborhood value signalAmong 1,095 residential records in the same neighborhood, the average assessor market value is about $178 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.

  • 1727 W 104th Pl, Chicago, IL 60643
    1,724 sqft | $174/sqft | built 1912 | Similar size (1,724 vs 1,700 sqft); Similar age (1912 vs 1914); Similar lot size (6,600 vs 6,480 sqft)
    $300,000
  • 10640 S Drew St, Chicago, IL 60643
    1,680 sqft | $173/sqft | built 1913 | Similar size (1,680 vs 1,700 sqft); Similar age (1913 vs 1914); Similar lot size (6,250 vs 6,480 sqft)
    $290,010
  • 1630 W 104th Pl, Chicago, IL 60643
    1,800 sqft | $194/sqft | built 1913 | 6% larger (1,800 vs 1,700 sqft); Similar age (1913 vs 1914); Similar lot size (6,600 vs 6,480 sqft)
    $350,000
  • 1666 W 104th Pl, Chicago, IL 60643
    1,709 sqft | $193/sqft | built 1917 | Similar size (1,709 vs 1,700 sqft); Similar age (1917 vs 1914); Similar lot size (6,600 vs 6,480 sqft)
    $330,000
  • 1627 W 105th Pl, Chicago, IL 60643
    1,684 sqft | $178/sqft | built 1924 | Similar size (1,684 vs 1,700 sqft); Similar lot size (6,300 vs 6,480 sqft); Same quality (Average)
    $300,000

Recent comparable sales

Sales selected by similarity to the subject property.

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$300,000$00.0%
2024$300,000+$50,000+20.0%
2023$250,000$00.0%
2022$250,000−$20,000−7.4%
2021$270,000+$108,770+67.5%
2020$161,230——
5-year total+$138,770+86.1%