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15312 WHISTLING STRAITS DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed2 bath1,572 sqftBuilt 2003

Property at a Glance

This home is estimated between $550,615 and $826,965, with a best estimate of $620,626. 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

$550,615 $826,965
Best Estimate
$620,626
WCAD Value
$741,073
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 $550,615 and $826,965. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15309 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,994 sqft Built 2003
Raw Value $805,999
Adjusted Value $657,815

Adjusted -$148,184 for 422 sqft less living space. Net adjustment: -$148,184.

15304 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 2,218 sqft Built 2003
Raw Value $794,327
Adjusted Value $567,486

Adjusted -$226,841 for 646 sqft less living space. Net adjustment: -$226,841.

10112 MORGAN CREEK DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
4 bed 2 bath 2,488 sqft Built 2003
Raw Value $872,266
Adjusted Value $550,615

Adjusted -$321,651 for 916 sqft less living space. Net adjustment: -$321,651.

10109 VALDERRAMA DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
5 bed 4 bath 1,516 sqft Built 2001
Raw Value $804,515
Adjusted Value $826,965

Adjusted +$19,664 for 56 sqft more living space and +$2,786 for being newer. Net adjustment: +$22,450.

15400 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.05 mi 100% similar Same subdivision
4 bed 3 bath 1,818 sqft Built 2001
Raw Value $704,222
Adjusted Value $620,626

Adjusted -$86,382 for 246 sqft less living space and +$2,786 for being newer. Net adjustment: -$83,596.

The Neighborhood

This home is valued 4.6% 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
$741,073
Median
$708,305

This home is +4.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,461 across all districts. With a homestead exemption claimed, that drops to $12,297 — saving $2,164 per year. That's $1,025 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%$6,619
AustinCity0.5240%$3,883
Williamson CountyCounty0.3694%$2,738
Austin Community Collegespecial0.1034%$766
Williamson County FM/RdCounty0.0443%$329
Upper Brushy Creek WCIDWater0.0170%$126
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$14,461

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $620,626 would pay approximately $3,874 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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