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15525 WHISTLING STRAITS DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed2 bath2,191 sqftBuilt 2003

Property at a Glance

This home is estimated between $455,176 and $936,518, with a best estimate of $806,433. 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

$455,176 $936,518
Best Estimate
$806,433
WCAD Value
$777,225
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 $455,176 and $936,518. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15521 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,525 sqft Built 2002
Raw Value $701,261
Adjusted Value $936,518

Adjusted +$233,864 for 666 sqft more living space and +$1,393 for being newer. Net adjustment: +$235,257.

15524 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 1,676 sqft Built 2003
Raw Value $650,017
Adjusted Value $830,858

Adjusted +$180,841 for 515 sqft more living space. Net adjustment: +$180,841.

15517 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 2,728 sqft Built 2002
Raw Value $642,349
Adjusted Value $455,176

Adjusted -$188,566 for 537 sqft less living space and +$1,393 for being newer. Net adjustment: -$187,173.

15520 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 2,050 sqft Built 2003
Raw Value $756,921
Adjusted Value $806,433

Adjusted +$49,512 for 141 sqft more living space. Net adjustment: +$49,512.

15524 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 2,389 sqft Built 2002
Raw Value $659,301
Adjusted Value $591,167

Adjusted -$69,527 for 198 sqft less living space and +$1,393 for being newer. Net adjustment: -$68,134.

The Neighborhood

This home is valued 9.7% 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
$777,225
Median
$708,305

This home is +9.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $15,166 across all districts. With a homestead exemption claimed, that drops to $12,957 — saving $2,209 per year. That's $1,080 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%$6,941
AustinCity0.5240%$4,073
Williamson CountyCounty0.3694%$2,871
Austin Community Collegespecial0.1034%$804
Williamson County FM/RdCounty0.0443%$345
Upper Brushy Creek WCIDWater0.0170%$132
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$15,166

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $806,433 would pay approximately $5,034 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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