Harris Value

21539 Mt McKinley Way, Katy, TX 77449

2,734 sqft, built 2009 Appraised at $320,077 for 2026.

Harris County account 1240210060010

Appraised value
$320,077
Tax year 2026 · after any cap, before exemptions
Living area
2,734 sqft
$117 per sqft
Year built
2009
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 77449, HCAD Appraisal Area 2847.05, and Katy assessment pages.

Protest deadline

The 2026 protest deadline was . The 2027 protest deadline is . 2027 notices usually arrive in April.

Deadline rule: May 15, or 30 days after your notice of appraised value is delivered, whichever is later. A deadline on a weekend or holiday moves to the next business day. Evidence is reviewed by the Appraisal Review Board (ARB). Dates checked against the official source.

Assessment snapshot

These public HCAD records highlight what may be worth checking before you file.

  • Assessment changeThe appraised value decreased 11.6% from $362,014 in 2025 to $320,077 in 2026.
  • Appraised 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 ZIP 77449.
  • Neighborhood value signalAmong 287 residential records in the same neighborhood, the average appraised value is about $131 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -8.6% on average.

Comparable assessments

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

  • 4227 Mt Vinson Way, Katy, TX 77449
    2,702 sqft | $114/sqft | built 2009 | Similar size (2,702 vs 2,734 sqft); Built same year (2009); Similar lot size (6,000 vs 6,110 sqft)
    $309,070
  • 4222 Mt Vinson Way, Katy, TX 77449
    2,720 sqft | $114/sqft | built 2007 | Similar size (2,720 vs 2,734 sqft); Similar age (2007 vs 2009); Similar lot size (6,000 vs 6,110 sqft)
    $309,394
  • 21531 Mt McKinley Way, Katy, TX 77449
    2,732 sqft | $105/sqft | built 2004 | Similar size (2,732 vs 2,734 sqft); Similar age (2004 vs 2009); Similar lot size (6,110 vs 6,110 sqft)
    $286,376
  • 21503 Mt McKinley Way, Katy, TX 77449
    2,742 sqft | $106/sqft | built 2004 | Similar size (2,742 vs 2,734 sqft); Similar age (2004 vs 2009); Similar lot size (6,115 vs 6,110 sqft)
    $291,380
  • 4130 Mt Everest Way, Katy, TX 77449
    2,721 sqft | $108/sqft | built 2005 | Similar size (2,721 vs 2,734 sqft); Similar age (2005 vs 2009); Similar lot size (6,048 vs 6,110 sqft)
    $295,053

Recent comparable sales

Sales selected by similarity to the subject property. Texas is a non-disclosure state, so these MLS-listed sales are supplemental evidence.

  • 4035 Mt Whitney Way, Katy, TX 77449
    September-4-2026 | 2,721 sqft | $110/sqft | built 2004 | Similar size (2,721 sqft); Moderate age difference (5 years older); Sold after the valuation date
    $299,000
  • 19806 Millstone Ridge Ln, Katy, TX 77449
    September-29-2026 | 2,433 sqft | $115/sqft | built 2005 | 11% size difference (2,433 sqft); Moderate age difference (4 years older); Sold after the valuation date
    $279,000
  • 20930 Barbons Heath Ct, Katy, TX 77449
    August-28-2026 | 2,429 sqft | $113/sqft | built 2006 | 11% size difference (2,429 sqft); Similar age (2006); Sold after the valuation date
    $274,900
  • 21315 Slate Crossing Ln, Katy, TX 77449
    September-17-2026 | 2,520 sqft | $119/sqft | built 2012 | 8% size difference (2,520 sqft); Similar age (2012); Sold after the valuation date
    $299,000
  • 5207 Appleton Meadow Trce, Katy, TX 77449
    September-30-2026 | 2,428 sqft | $124/sqft | built 2016 | 11% size difference (2,428 sqft); Moderate age difference (7 years newer); Sold after the valuation date
    $299,999

Public appraisal comparison for 2026. Prepared . Appraisal source: Harris County Appraisal District. Sales data checked in this snapshot: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.