Harris Value

21478 Biscayne Valley Ln, Katy, TX 77449

3,020 sqft, built 2013 Appraised at $410,845 for 2026.

Harris County account 1334620010035

Appraised value
$410,845
Tax year 2026 · after any cap, before exemptions
Living area
3,020 sqft
$136 per sqft
Year built
2013
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 2941.06, 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 2.4% from $401,194 in 2025 to $410,845 in 2026.
  • Appraised value per square footThe current public record shows about $136 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 548 residential records in the same neighborhood, the average appraised value is about $130 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -1.4% on average.

Comparable assessments

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

  • 4002 Sherry Mist Ln, Katy, TX 77449
    3,029 sqft | $114/sqft | built 2011 | Similar size (3,029 vs 3,020 sqft); Similar age (2011 vs 2013); Similar lot size (11,835 vs 11,184 sqft)
    $344,582
  • 4335 Tudor Ranch Ln, Katy, TX 77449
    3,095 sqft | $122/sqft | built 2013 | Similar size (3,095 vs 3,020 sqft); Built same year (2013); Similar lot size (10,642 vs 11,184 sqft)
    $378,410
  • 21402 Veneto Hills Ct, Katy, TX 77449
    3,052 sqft | $120/sqft | built 2012 | Similar size (3,052 vs 3,020 sqft); Similar age (2012 vs 2013); Similar lot size (12,008 vs 11,184 sqft)
    $367,007
  • 4350 Foster Gardens Ln, Katy, TX 77449
    3,081 sqft | $120/sqft | built 2014 | Similar size (3,081 vs 3,020 sqft); Similar age (2014 vs 2013); Similar lot size (10,116 vs 11,184 sqft)
    $368,593
  • 4206 Kendall Rock Ln, Katy, TX 77449
    2,995 sqft | $126/sqft | built 2015 | Similar size (2,995 vs 3,020 sqft); Similar age (2015 vs 2013); Lot 11% smaller (9,956 vs 11,184 sqft)
    $377,297

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.

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.