Williamson Value property tax analysis

5874 Casstello Dr, Round Rock, TX 78665

2 bathrooms, 1,564 sqft, built 2015, in H123414C - Siena Limmer Loop Appraised at $349,317 for 2026.

Williamson County account 338943

Appraised value
$349,317
Tax year 2026
Market value
$349,317
Living area
1,564 sqft
$223 per sqft
Year built
2015

Why this page matters for a protest

A strong tax protest page needs the county value, property facts, and enough context to compare this home with similar properties nearby. This page gives homeowners a starting point before reviewing comparable homes and prior-year changes.

The county value changed -7.6% from $378,246 in 2025 to $349,317 in 2026.