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15300 WHISTLING STRAITS DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed3 bath3,081 sqftBuilt 2001

Property at a Glance

This home is estimated between $727,372 and $1,034,740, with a best estimate of $777,839. 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

$727,372 $1,034,740
Best Estimate
$777,839
WCAD Value
$773,803
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 $727,372 and $1,034,740. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15308 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 2,986 sqft Built 2003
Raw Value $756,910
Adjusted Value $787,483

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

10012 VALDERRAMA DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
4 bed 2 bath 2,579 sqft Built 2003
Raw Value $861,250
Adjusted Value $1,034,740

Adjusted +$176,276 for 502 sqft more living space and -$2,786 for being older. Net adjustment: +$173,490.

15301 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
3 bed 2 bath 3,101 sqft Built 2002
Raw Value $736,397
Adjusted Value $727,981

Adjusted -$7,023 for 20 sqft less living space and -$1,393 for being older. Net adjustment: -$8,416.

10113 VALDERRAMA DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
4 bed 3 bath 3,013 sqft Built 2001
Raw Value $753,961
Adjusted Value $777,839

Adjusted +$23,878 for 68 sqft more living space. Net adjustment: +$23,878.

10108 VALDERRAMA DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
3 bed 2 bath 2,906 sqft Built 2002
Raw Value $667,314
Adjusted Value $727,372

Adjusted +$61,451 for 175 sqft more living space and -$1,393 for being older. Net adjustment: +$60,058.

The Neighborhood

This home is valued 9.2% 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
$773,803
Median
$708,305

This home is +9.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $15,099 across all districts. With a homestead exemption claimed, that drops to $12,895 — saving $2,204 per year. That's $1,075 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%$6,911
AustinCity0.5240%$4,055
Williamson CountyCounty0.3694%$2,859
Austin Community Collegespecial0.1034%$800
Williamson County FM/RdCounty0.0443%$343
Upper Brushy Creek WCIDWater0.0170%$132
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$15,099

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $777,839 would pay approximately $4,855 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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