Williamson Value property tax analysis

12001 Grey Rock Ln, Austin, TX 78750

2 bathrooms, 1,381 sqft, built 1977, in R3P5480G - Anderson Mill 12,16 - 20 - Partially In Tcad Appraised at $339,451 for 2026.

Williamson County account 120118

Appraised value
$339,451
Tax year 2026
Market value
$339,451
Living area
1,381 sqft
$246 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 -5.0% from $357,478 in 2025 to $339,451 in 2026.