Williamson Value property tax analysis

4621 Post Ln, Round Rock, TX 78681

3 bed / 2 bath, 1,865 sqft, built 2021, in G799514C - Mayfield Ranch Appraised at $426,460 for 2026.

Williamson County account 420022

Appraised value
$426,460
Tax year 2026
Market value
$426,460
Living area
1,865 sqft
$229 per sqft
Year built
2021

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 -7.4% from $460,569 in 2025 to $426,460 in 2026.