Williamson Value property tax analysis

12100 Grey Rock Ln, Austin, TX 78750

1,653 sqft, built 1977, in R3P5480G - Anderson Mill 12,16 - 20 - Partially In Tcad Appraised at $445,298 for 2026.

Williamson County account 120136

Appraised value
$445,298
Tax year 2026
Market value
$445,298
Living area
1,653 sqft
$269 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 -1.5% from $452,247 in 2025 to $445,298 in 2026.