Cook County Value

8115 N Ottawa Ave, Niles, IL 60714

4 bed / 2 bath, 2,041 sqft, built 1937, in Leyden. Assessor market value for 2026: $480,000.

Cook County account 09243150290000

Assessor market value
$480,000
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,041 sqft
$235 per sqft
Year built
1937
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 Leyden 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 stayed about the same, from $480,000 in 2025 to $480,000 in 2026.
  • Assessor market value per square footThe current public record shows about $235 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Leyden neighborhood and ZIP 60714.
  • Neighborhood value signalAmong 4,336 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

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

  • 8113 N Osceola Ave, Niles, IL 60714
    1,998 sqft | $223/sqft | built 1929 | Similar size (1,998 vs 2,041 sqft); Lot 18% larger (5,580 vs 4,713 sqft); Same quality (Average)
    $446,150
  • 8114 N Merrill St, Niles, IL 60714
    1,952 sqft | $246/sqft | built 1928 | Similar size (1,952 vs 2,041 sqft); Lot 12% smaller (4,158 vs 4,713 sqft); Same quality (Average)
    $480,000
  • 8330 N Osceola Ave, Niles, IL 60714
    2,157 sqft | $135/sqft | built 1948 | 6% larger (2,157 vs 2,041 sqft); Lot 12% smaller (4,125 vs 4,713 sqft); Same quality (Average)
    $291,020
  • 8111 N Osceola Ave, Niles, IL 60714
    2,018 sqft | $219/sqft | built 1928 | Similar size (2,018 vs 2,041 sqft); Lot 18% larger (5,580 vs 4,713 sqft); Same quality (Average)
    $442,840
  • 7805 W Keeney St, Niles, IL 60714
    2,002 sqft | $127/sqft | built 1950 | Similar size (2,002 vs 2,041 sqft); Lot 20% smaller (3,780 vs 4,713 sqft); Same quality (Average)
    $253,440

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

No change in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$480,000$00.0%
2025$480,000+$90,000+23.1%
2024$390,000$00.0%
2023$390,000$00.0%
2022$390,000+$146,380+60.1%
2021$243,620+$200.0%
2020$243,600——
6-year total+$236,400+97.0%