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16300 CASTLETROY DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed2 bath1,229 sqftBuilt 2003

Property at a Glance

This home is estimated between $259,990 and $638,033, with a best estimate of $574,941. That places the property above the R250401D - AVERY RANCH EAST (PH. 1) median of $524,962, in a neighborhood that declined 2.2% over the past year.

Estimated Value Range

$259,990 $638,033
Best Estimate
$574,941
WCAD Value
$578,403
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in R250401D - AVERY RANCH EAST (PH. 1). The estimated range of $259,990 and $638,033 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,280 sqft Built 2005
Raw Value $638,799
Adjusted Value $638,033

Adjusted -$15,626 for 51 sqft less living space and +$14,860 for being newer. Net adjustment: -$766.

16425 CASTLETROY DR, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,181 sqft Built 2002
Raw Value $576,117
Adjusted Value $583,393

Adjusted +$14,706 for 48 sqft more living space and -$7,430 for being older. Net adjustment: +$7,276.

16409 CASTLETROY DR, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,872 sqft Built 2002
Raw Value $464,425
Adjusted Value $259,990

Adjusted -$197,005 for 643 sqft less living space and -$7,430 for being older. Net adjustment: -$204,435.

4 bed 2 bath 1,243 sqft Built 1993
Raw Value $651,144
Adjusted Value $572,555

Adjusted -$4,289 for 14 sqft less living space and -$74,300 for being older. Net adjustment: -$78,589.

4 bed 2 bath 1,322 sqft Built 1996
Raw Value $655,445
Adjusted Value $574,941

Adjusted -$28,494 for 93 sqft less living space and -$52,010 for being older. Net adjustment: -$80,504.

The Neighborhood

This home is valued 10.2% above the R250401D - AVERY RANCH EAST (PH. 1) median of $524,962. With 323 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 2.2% over the past year.

R250401D - AVERY RANCH EAST (PH. 1)

typical
323 Properties
$524,962 Median Value
-2.2% YoY Change
0% Have Pool
100% Have Garage
This Home
$578,403
Median
$524,962

This home is +10.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $11,286 across all districts. With a homestead exemption claimed, that drops to $9,323 — saving $1,963 per year. That's $777 per month a buyer should budget. The assessed value increased roughly in line with the neighborhood, so a tax protest is unlikely to yield significant savings.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$5,166
AustinCity0.5240%$3,031
Williamson CountyCounty0.3694%$2,137
Austin Community Collegespecial0.1034%$598
Williamson County FM/RdCounty0.0443%$256
Upper Brushy Creek WCIDWater0.0170%$98
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$11,286

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $574,941 would pay approximately $3,589 per month (principal and interest only, excluding taxes and insurance).

Data sourced from Williamson County Appraisal District (WCAD), Texas Education Agency (TEA), and Federal Reserve Economic Data (FRED). Assessment values reflect the appraisal district's estimate, not market sale prices. Report generated 4/18/2026.

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