Cook County Value

421 S 12th Ave Maywood, IL 60153

4 bed / 2 bath, 2,051 sqft, built 1910, in Proviso. Assessor market value for 2026: $240,010.

Cook County account 15104150330000

Assessor market value
$240,010
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
2,051 sqft
$117 per sqft
Year built
1910
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 60153 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 16.1% from $206,700 in 2025 to $240,010 in 2026.
  • Assessor market value per square footThe current public record shows about $117 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 60153.
  • Neighborhood value signalAmong 2,888 residential records in the same neighborhood, the average assessor market value is about $167 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +14.5% on average.

Comparable assessments

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

  • 820 S 14th Ave Maywood, IL 60153
    1,998 sqft | $125/sqft | built 1908 | Similar size (1,998 vs 2,051 sqft); Similar age (1908 vs 1910); Similar lot size (6,550 vs 6,593 sqft)
    $250,010
  • 404 S 1st Ave Maywood, IL 60153
    2,076 sqft | $130/sqft | built 1905 | Similar size (2,076 vs 2,051 sqft); Similar age (1905 vs 1910); Similar lot size (6,600 vs 6,593 sqft)
    $270,000
  • 18 S 17th Ave Maywood, IL 60153
    2,058 sqft | $136/sqft | built 1905 | Similar size (2,058 vs 2,051 sqft); Similar age (1905 vs 1910); Similar lot size (6,350 vs 6,593 sqft)
    $280,010
  • 308 S 10th Ave Maywood, IL 60153
    2,066 sqft | $131/sqft | built 1912 | Similar size (2,066 vs 2,051 sqft); Similar age (1912 vs 1910); Similar lot size (6,200 vs 6,593 sqft)
    $270,000
  • 403 S 3rd Ave Maywood, IL 60153
    2,008 sqft | $139/sqft | built 1911 | Similar size (2,008 vs 2,051 sqft); Similar age (1911 vs 1910); Similar lot size (7,014 vs 6,593 sqft)
    $280,000

Recent comparable sales

No usable comparable sales are available in this data snapshot.

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 16.1% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$240,010+$33,310+16.1%
2025$206,700−$33,300−13.9%
2024$240,000$00.0%
2023$240,000+$93,200+63.5%
2022$146,800−$15,730−9.7%
2021$162,530−$11,250−6.5%
2020$173,780——
6-year total+$66,230+38.1%