Cook County Value

8121 N Prospect Ave, Niles, IL 60714

4 bed / 2 bath, 2,928 sqft, built 2005, in Maine. Assessor market value for 2026: $731,350.

Cook County account 09234020260000

Assessor market value
$731,350
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,928 sqft
$250 per sqft
Year built
2005
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 60714 and Maine assessment pages.

Local guide: Maine Township 2026 Property Tax Appeal Guide.

Appeal deadlines

The 2026 appeal windows for Maine have closed (Assessor , Board of Review ). 2027 notices usually start in March.

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 decreased 9.7% from $810,000 in 2025 to $731,350 in 2026.
  • Assessor market value per square footThe current public record shows about $250 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Maine neighborhood and ZIP 60714.
  • Neighborhood value signalAmong 956 residential records in the same neighborhood, the average assessor market value is about $284 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -1.5% on average.

Comparable assessments

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

  • 8144 N Grace Ave, Niles, IL 60714
    2,887 sqft | $266/sqft | built 2006 | Similar size (2,887 vs 2,928 sqft); Similar age (2006 vs 2005); Similar lot size (6,650 vs 7,000 sqft)
    $768,650
  • 8518 W Ebert Pl, Niles, IL 60714
    2,940 sqft | $230/sqft | built 2001 | Similar size (2,940 vs 2,928 sqft); Similar age (2001 vs 2005); Lot 10% larger (7,702 vs 7,000 sqft)
    $675,190
  • 8431 W Bruce Dr House, Niles, IL 60714
    2,951 sqft | $281/sqft | built 2005 | Similar size (2,951 vs 2,928 sqft); Built same year (2005); Lot 11% smaller (6,250 vs 7,000 sqft)
    $830,000
  • 8447 W Normal Ave, Niles, IL 60714
    2,962 sqft | $269/sqft | built 2010 | Similar size (2,962 vs 2,928 sqft); Similar age (2010 vs 2005); Lot 11% smaller (6,250 vs 7,000 sqft)
    $796,870
  • 8507 W Clara Dr, Niles, IL 60714
    2,988 sqft | $264/sqft | built 2004 | Similar size (2,988 vs 2,928 sqft); Similar age (2004 vs 2005); Lot 11% smaller (6,250 vs 7,000 sqft)
    $790,000

Recent comparable sales

Sales selected by similarity to the subject property.

  • 7922 N Oketo Ave, Niles, IL 60714
    2,959 sqft | $338/sqft | built 2010 | Similar size (2,959 sqft); Moderate age difference (5 years newer); Within 1 bedroom (5 vs 4)
    $1,000,000

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

Down 9.7% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$731,350−$78,650−9.7%
2025$810,000+$264,810+48.6%
2024$545,190——
2-year total+$186,160+34.1%