Williamson Value property tax analysis

103 Black St S, Round Rock, TX 78664

1 bathrooms, 1,329 sqft, built 1920, in R703T14G - Round Rock Historical Appraised at $393,942 for 2026.

Williamson County account 126646

Appraised value
$393,942
Tax year 2026
Market value
$393,942
Living area
1,329 sqft
$296 per sqft
Year built
1920

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 +6.4% from $370,223 in 2025 to $393,942 in 2026.