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15437 WHISTLING STRAITS DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed2 bath1,337 sqftBuilt 2004

Property at a Glance

This home is estimated between $536,348 and $682,603, with a best estimate of $638,090. 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

$536,348 $682,603
Best Estimate
$638,090
WCAD Value
$725,974
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 $536,348 and $682,603. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15433 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,460 sqft Built 2003
Raw Value $724,401
Adjusted Value $682,603

Adjusted -$43,191 for 123 sqft less living space and +$1,393 for being newer. Net adjustment: -$41,798.

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 $536,348

Adjusted -$188,917 for 538 sqft less living space. Net adjustment: -$188,917.

15501 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,804 sqft Built 2003
Raw Value $723,794
Adjusted Value $561,201

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

15500 FISHER ISLAND DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 3 bath 1,260 sqft Built 2004
Raw Value $611,052
Adjusted Value $638,090

Adjusted +$27,038 for 77 sqft more living space. Net adjustment: +$27,038.

15432 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,276 sqft Built 2004
Raw Value $641,644
Adjusted Value $663,064

Adjusted +$21,420 for 61 sqft more living space. Net adjustment: +$21,420.

The Neighborhood

This home is valued 2.5% 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
$725,974
Median
$708,305

This home is +2.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,166 across all districts. With a homestead exemption claimed, that drops to $12,021 — saving $2,145 per year. That's $1,002 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%$6,484
AustinCity0.5240%$3,804
Williamson CountyCounty0.3694%$2,682
Austin Community Collegespecial0.1034%$751
Williamson County FM/RdCounty0.0443%$322
Upper Brushy Creek WCIDWater0.0170%$123
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$14,166

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $638,090 would pay approximately $3,983 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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