Harris Value

21530 Tallow Grove Ln, Katy, TX 77450

3,360 sqft, built 2003, in Oak Park Trails Appraised at $427,563 for 2026.

Harris County account 1234360010023

Appraised value
$427,563
Tax year 2026 · after any cap, before exemptions
Living area
3,360 sqft
$127 per sqft
Year built
2003
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 77450, Oak Park Trails, 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 4.1% from $445,633 in 2025 to $427,563 in 2026.
  • Appraised value per square footThe current public record shows about $127 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Oak Park Trails neighborhood and ZIP 77450.
  • Neighborhood value signalAmong 871 residential records in the same neighborhood, the average appraised value is about $148 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -0.6% on average.

Comparable assessments

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

  • 21547 Oak Park Trails Dr, Katy, TX 77450
    3,324 sqft | $127/sqft | built 2003 | Similar size (3,324 vs 3,360 sqft); Built same year (2003); Similar lot size (7,460 vs 7,475 sqft)
    $421,514
  • 21722 Ashford Grv, Katy, TX 77450
    3,324 sqft | $123/sqft | built 2002 | Similar size (3,324 vs 3,360 sqft); Similar age (2002 vs 2003); Similar lot size (7,373 vs 7,475 sqft)
    $409,099
  • 21742 Canyon Terrace Ln, Katy, TX 77450
    3,360 sqft | $123/sqft | built 2001 | Similar size (3,360 vs 3,360 sqft); Similar age (2001 vs 2003); Similar lot size (7,297 vs 7,475 sqft)
    $414,746
  • 21607 Ashford Grv, Katy, TX 77450
    3,366 sqft | $122/sqft | built 2002 | Similar size (3,366 vs 3,360 sqft); Similar age (2002 vs 2003); Similar lot size (7,218 vs 7,475 sqft)
    $412,199
  • 21526 Tallow Grove Ln, Katy, TX 77450
    3,260 sqft | $127/sqft | built 2003 | Similar size (3,260 vs 3,360 sqft); Built same year (2003); Similar lot size (7,475 vs 7,475 sqft)
    $414,036

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.

  • 22919 Heathercroft Dr, Katy, TX 77450
    September-30-2026 | 3,424 sqft | $143/sqft | built 1998 | Similar size (3,424 sqft); Moderate age difference (5 years older); Sold after the valuation date
    $489,000
  • 2406 Gable Hollow Ln, Katy, TX 77450
    August-7-2026 | 3,393 sqft | $118/sqft | built 2006 | Similar size (3,393 sqft); Similar age (2006); Sold after the valuation date
    $399,000
  • 22814 Pennyrile Ln, Katy, TX 77450
    July-16-2026 | 3,389 sqft | $156/sqft | built 1996 | Similar size (3,389 sqft); Moderate age difference (7 years older); Sold after the valuation date
    $529,000
  • 20723 Autumn Terrace Ln, Katy, TX 77450
    July-17-2026 | 3,469 sqft | $150/sqft | built 2002 | Similar size (3,469 sqft); Similar age (2002); Sold after the valuation date
    $519,990
  • 23006 Heathercroft Dr, Katy, TX 77450
    July-27-2026 | 3,351 sqft | $134/sqft | built 1998 | Similar size (3,351 sqft); Moderate age difference (5 years older); Sold after the valuation date
    $450,000

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.