Harris Value

20166 Tilstock Dr, Katy, TX 77450

3,211 sqft, built 1981, in Kelliwood Appraised at $508,638 for 2026.

Harris County account 1153720010001

Appraised value
$508,638
Tax year 2026 · after any cap, before exemptions
Living area
3,211 sqft
$158 per sqft
Year built
1981
Excellent 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, Kelliwood, 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 6.7% from $476,713 in 2025 to $508,638 in 2026.
  • Appraised value per square footThe current public record shows about $158 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Kelliwood neighborhood and ZIP 77450.
  • Neighborhood value signalAmong 394 residential records in the same neighborhood, the average appraised value is about $162 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +4.9% on average.

Comparable assessments

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

  • 20162 Tilstock Dr, Katy, TX 77450
    3,321 sqft | $157/sqft | built 1981 | Similar size (3,321 vs 3,211 sqft); Built same year (1981); Similar lot size (8,625 vs 9,260 sqft)
    $521,026
  • 20022 Erika Way Dr, Katy, TX 77450
    3,334 sqft | $177/sqft | built 1988 | Similar size (3,334 vs 3,211 sqft); Similar lot size (9,242 vs 9,260 sqft); Same quality (Excellent)
    $588,589
  • 1918 Alana Springs Dr, Katy, TX 77450
    3,259 sqft | $175/sqft | built 1988 | Similar size (3,259 vs 3,211 sqft); Similar lot size (9,775 vs 9,260 sqft); Same quality (Excellent)
    $571,120
  • 1907 Windy Ridge Dr, Katy, TX 77450
    3,338 sqft | $178/sqft | built 1989 | Similar size (3,338 vs 3,211 sqft); Similar lot size (9,360 vs 9,260 sqft); Same quality (Excellent)
    $595,365
  • 1915 Windy Ridge Dr, Katy, TX 77450
    3,027 sqft | $181/sqft | built 1989 | 6% smaller (3,027 vs 3,211 sqft); Similar lot size (9,280 vs 9,260 sqft); Same quality (Excellent)
    $548,613

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.

  • 614 Houghton Rd, Katy, TX 77450
    August-4-2026 | 3,125 sqft | $142/sqft | built 1974 | Similar size (3,125 sqft); Moderate age difference (7 years older); Sold after the valuation date
    $445,000
  • 22519 Wildwood Grove Dr, Katy, TX 77450
    July-2-2026 | 3,123 sqft | $152/sqft | built 1984 | Similar size (3,123 sqft); Similar age (1984); Sold after the valuation date
    $475,000
  • 23027 Red River Dr, Katy, TX 77450
    August-31-2026 | 3,005 sqft | $133/sqft | built 1989 | 6% size difference (3,005 sqft); Moderate age difference (8 years newer); Sold after the valuation date
    $400,000
  • 20618 Chestnut Hills Dr, Katy, TX 77450
    June-4-2026 | 3,236 sqft | $150/sqft | built 1980 | Similar size (3,236 sqft); Similar age (1980); Sold after the valuation date
    $485,000
  • 1214 Shillington Dr, Katy, TX 77450
    July-9-2026 | 3,024 sqft | $144/sqft | built 1980 | 6% size difference (3,024 sqft); Similar age (1980); Sold after the valuation date
    $435,000

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.