Beta Williamson County, TX only — data and coverage are limited during early access.

15308 WHISTLING STRAITS DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed2 bath2,986 sqftBuilt 2003

Property at a Glance

This home is estimated between $638,236 and $1,064,008, with a best estimate of $768,546. That places the property above the R251501D - Avery Ranch South median of $708,305, in a neighborhood that declined 3.8% over the past year.

Estimated Value Range

$638,236 $1,064,008
Best Estimate
$768,546
WCAD Value
$756,910
High Confidence

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

Based on 5 comparable properties in R251501D - Avery Ranch South, this home's estimated market value is between $638,236 and $1,064,008. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15304 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 2,218 sqft Built 2003
Raw Value $794,327
Adjusted Value $1,064,008

Adjusted +$269,681 for 768 sqft more living space. Net adjustment: +$269,681.

15305 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 2,965 sqft Built 2003
Raw Value $761,446
Adjusted Value $768,820

Adjusted +$7,374 for 21 sqft more living space. Net adjustment: +$7,374.

15316 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 3,305 sqft Built 2002
Raw Value $748,859
Adjusted Value $638,236

Adjusted -$112,016 for 319 sqft less living space and +$1,393 for being newer. Net adjustment: -$110,623.

15300 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 3 bath 3,081 sqft Built 2001
Raw Value $773,803
Adjusted Value $743,230

Adjusted -$33,359 for 95 sqft less living space and +$2,786 for being newer. Net adjustment: -$30,573.

10108 MORGAN CREEK DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
3 bed 2 bath 3,076 sqft Built 2002
Raw Value $798,756
Adjusted Value $768,546

Adjusted -$31,603 for 90 sqft less living space and +$1,393 for being newer. Net adjustment: -$30,210.

The Neighborhood

This home is valued 6.9% above the R251501D - Avery Ranch South median of $708,305. With 635 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 3.8% over the past year.

R251501D - Avery Ranch South

typical
635 Properties
$708,305 Median Value
-3.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$756,910
Median
$708,305

This home is +6.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,770 across all districts. With a homestead exemption claimed, that drops to $12,586 — saving $2,184 per year. That's $1,049 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%$6,760
AustinCity0.5240%$3,966
Williamson CountyCounty0.3694%$2,796
Austin Community Collegespecial0.1034%$783
Williamson County FM/RdCounty0.0443%$336
Upper Brushy Creek WCIDWater0.0170%$129
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$14,770

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $768,546 would pay approximately $4,797 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.

View full property details