Harris Value

21418 Park Mill Ln, Katy, TX 77450

1,284 sqft, built 1985, in Memorial Parkway Appraised at $236,491 for 2026.

Harris County account 1156030460053

Appraised value
$236,491
Tax year 2026 · after any cap, before exemptions
Market value
$240,955
Living area
1,284 sqft
$184 per sqft
Year built
1985
Average quality
Homestead
Yes
Owner-occupied exemption on file

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 77450, Memorial Parkway, 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 increased 20.0% from $197,076 in 2025 to $236,491 in 2026.
  • Appraised value per square footThe current public record shows about $184 per square foot before any comparable-property adjustments.
  • Market/appraised spreadThe county market value is $4,464 above the appraised value used on this page.
  • Nearby comparison areaThis page starts the equity review with public records for the Memorial Parkway neighborhood and ZIP 77450.
  • Neighborhood value signalAmong 229 residential records in the same neighborhood, the average appraised value is about $160 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +2.3% on average.

Comparable assessments

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

  • 21430 Park Mill Ln, Katy, TX 77450
    1,284 sqft | $189/sqft | built 1985 | Similar size (1,284 vs 1,284 sqft); Built same year (1985); Similar lot size (6,785 vs 6,785 sqft)
    $243,189
  • 21410 Park Bishop Dr, Katy, TX 77450
    1,284 sqft | $185/sqft | built 1984 | Similar size (1,284 vs 1,284 sqft); Similar age (1984 vs 1985); Similar lot size (6,900 vs 6,785 sqft)
    $237,912
  • 21451 Park Bishop Dr, Katy, TX 77450
    1,284 sqft | $189/sqft | built 1983 | Similar size (1,284 vs 1,284 sqft); Similar age (1983 vs 1985); Similar lot size (6,695 vs 6,785 sqft)
    $242,674
  • 21431 Park Orchard Dr, Katy, TX 77450
    1,277 sqft | $193/sqft | built 1984 | Similar size (1,277 vs 1,284 sqft); Similar age (1984 vs 1985); Similar lot size (6,900 vs 6,785 sqft)
    $246,795
  • 21427 Park Orchard Dr, Katy, TX 77450
    1,284 sqft | $167/sqft | built 1983 | Similar size (1,284 vs 1,284 sqft); Similar age (1983 vs 1985); Similar lot size (6,900 vs 6,785 sqft)
    $214,912

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.

  • 21422 Park Bishop Dr, Katy, TX 77450
    August-6-2026 | 1,335 sqft | $184/sqft | built 1983 | Similar size (1,335 sqft); Similar age (1983); Sold after the valuation date
    $245,000
  • 919 Western Hills Dr, Katy, TX 77450
    August-4-2026 | 1,296 sqft | $174/sqft | built 1978 | Similar size (1,296 sqft); Moderate age difference (7 years older); Sold after the valuation date
    $224,900
  • 1163 Rock Canyon Dr, Katy, TX 77450
    June-29-2026 | 1,224 sqft | $180/sqft | built 1981 | Similar size (1,224 sqft); Moderate age difference (4 years older); Sold after the valuation date
    $220,000
  • 911 Golden West Dr, Katy, TX 77450
    September-28-2026 | 1,413 sqft | $205/sqft | built 1979 | 10% size difference (1,413 sqft); Moderate age difference (6 years older); Sold after the valuation date
    $289,000
  • 1206 Park Ln, Katy, TX 77450
    May-6-2026 | 1,350 sqft | $185/sqft | built 1981 | 5% size difference (1,350 sqft); Moderate age difference (4 years older); Sold after the valuation date
    $250,000

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.