Williamson County — texaspropertytaxappeal.com

Protest Deadline: May 15, 2026 (40 days left)

16200 CASTLETROY DR, AUSTIN, TX 78717

This property may be over-assessed.

Estimated annual tax savings
$2,456
Based on assessment gap vs. neighborhood median
Your $/sqft
$315
Neighborhood median
$241
Appraised value
$469,912
% above median
31.1%
Heated area
1,490 sqft
Year built
2004

Comparable properties in your neighborhood

These homes are similar to yours and assessed lower per square foot.

Address Sqft Year Market Value $/Sqft Diff
9321 BILLINGHAM TRL, AUSTIN, TX 78717 1,650 2004 $468,987 $284 -$31
16908 BRAYTON PARK DR, AUSTIN, TX 78717 1,616 2003 $461,903 $286 -$30
9409 BILLINGHAM TRL, AUSTIN, TX 78717 1,677 2004 $451,985 $270
9413 MUSKBERRY CV, AUSTIN, TX 78717 1,633 2003 $446,676 $274
9304 MUSKBERRY CV, AUSTIN, TX 78717 1,585 2002 $441,147 $278
9401 BILLINGHAM TRL, AUSTIN, TX 78717 1,693 2004 $457,481 $270

🔒 4 more comparable properties available in your evidence packet

How we calculated this

We compared your property's assessed value per square foot ($315/sqft) against the median for your neighborhood ($241/sqft). Your property is assessed 31.1% higher than typical homes nearby.

If the appraisal district adjusted your value to the neighborhood median, you could save approximately $2,456 per year in property taxes based on the Williamson County effective tax rate.

We identified the 6 most comparable homes — matched on square footage, age, quality, and location — all assessed at lower $/sqft values.

What you'll receive

📋

Filing Guide

Your exact deadline, required forms, and step-by-step Williamson County filing process

📊

Evidence Packet

Full comparable sales analysis with 6 properties, assessment discrepancy calculation, and maps

✉️

Cover Letter

Pre-written appeal letter with hearing talking points, ready to sign and submit

This decision compounds

Year 1
$2,456
Year 2
$4,912
Year 3
$7,368

That’s a 150× return on $49

Get your protest packet

One-time fee · No recurring charges · You keep 100% of your savings

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Protest deadline: May 15, 2026 (40 days left)