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15501 WHISTLING STRAITS DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed2 bath1,804 sqftBuilt 2003

Property at a Glance

This home is estimated between $364,516 and $888,567, with a best estimate of $698,941. That places the property below the R251501D - Avery Ranch South median of $708,305, in a neighborhood that declined 3.8% over the past year.

Estimated Value Range

$364,516 $888,567
Best Estimate
$698,941
WCAD Value
$723,794
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 $364,516 and $888,567. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15505 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,777 sqft Built 2002
Raw Value $701,753
Adjusted Value $712,627

Adjusted +$9,481 for 27 sqft more living space and +$1,393 for being newer. Net adjustment: +$10,874.

15437 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,337 sqft Built 2004
Raw Value $725,974
Adjusted Value $888,567

Adjusted +$163,986 for 467 sqft more living space and -$1,393 for being older. Net adjustment: +$162,593.

15504 FISHER ISLAND DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
3 bed 2 bath 2,541 sqft Built 2004
Raw Value $624,704
Adjusted Value $364,516

Adjusted -$258,795 for 737 sqft less living space and -$1,393 for being older. Net adjustment: -$260,188.

15436 FISHER ISLAND DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,875 sqft Built 2004
Raw Value $725,265
Adjusted Value $698,941

Adjusted -$24,931 for 71 sqft less living space and -$1,393 for being older. Net adjustment: -$26,324.

15509 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 2,350 sqft Built 2003
Raw Value $647,670
Adjusted Value $455,944

Adjusted -$191,726 for 546 sqft less living space. Net adjustment: -$191,726.

The Neighborhood

This home is valued 2.2% 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
$723,794
Median
$708,305

This home is +2.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,123 across all districts. With a homestead exemption claimed, that drops to $11,981 — saving $2,142 per year. That's $998 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%$6,464
AustinCity0.5240%$3,793
Williamson CountyCounty0.3694%$2,674
Austin Community Collegespecial0.1034%$748
Williamson County FM/RdCounty0.0443%$321
Upper Brushy Creek WCIDWater0.0170%$123
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$14,123

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $698,941 would pay approximately $4,363 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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