Harris Value

20118 Tilstock Dr, Katy, TX 77450

3,880 sqft, built 1987, in Kelliwood Appraised at $607,526 for 2026.

Harris County account 1153720010003

Appraised value
$607,526
Tax year 2026 · after any cap, before exemptions
Living area
3,880 sqft
$157 per sqft
Year built
1987
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 4.5% from $581,350 in 2025 to $607,526 in 2026.
  • Appraised value per square footThe current public record shows about $157 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.

  • 19934 Kellicreek Dr, Katy, TX 77450
    3,899 sqft | $164/sqft | built 1989 | Similar size (3,899 vs 3,880 sqft); Similar age (1989 vs 1987); Similar lot size (10,270 vs 10,350 sqft)
    $639,835
  • 1506 Shillington Dr, Katy, TX 77450
    3,845 sqft | $162/sqft | built 1987 | Similar size (3,845 vs 3,880 sqft); Built same year (1987); Similar lot size (10,010 vs 10,350 sqft)
    $623,818
  • 1823 Hollow Wind Dr, Katy, TX 77450
    3,899 sqft | $167/sqft | built 1989 | Similar size (3,899 vs 3,880 sqft); Similar age (1989 vs 1987); Similar lot size (10,624 vs 10,350 sqft)
    $649,951
  • 20035 Stonelodge St, Katy, TX 77450
    3,791 sqft | $166/sqft | built 1989 | Similar size (3,791 vs 3,880 sqft); Similar age (1989 vs 1987); Similar lot size (10,270 vs 10,350 sqft)
    $629,927
  • 19922 Sky Hollow Ln, Katy, TX 77450
    3,853 sqft | $165/sqft | built 1989 | Similar size (3,853 vs 3,880 sqft); Similar age (1989 vs 1987); Similar lot size (10,000 vs 10,350 sqft)
    $636,252

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: . Matches consider available size, age, location and property characteristics. How comparisons work.