Williamson Value property tax analysis

12 Valley Trl, Round Rock, TX 78664

2 bathrooms, 1,859 sqft, built 1977, in R575583D - Rr Rual Sub 122 & Gattis School Rd Area Appraised at $718,079 for 2026.

Williamson County account 132859

Appraised value
$718,079
Tax year 2026
Market value
$755,622
Living area
1,859 sqft
$386 per sqft
Year built
1977

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 +10.0% from $652,799 in 2025 to $718,079 in 2026.