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15513 WHISTLING STRAITS DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed2 bath1,427 sqftBuilt 2002

Property at a Glance

This home is estimated between $543,541 and $720,134, with a best estimate of $666,849. 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

$543,541 $720,134
Best Estimate
$666,849
WCAD Value
$657,530
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 $543,541 and $720,134. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15505 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,777 sqft Built 2002
Raw Value $701,753
Adjusted Value $578,851

Adjusted -$122,902 for 350 sqft less living space. Net adjustment: -$122,902.

15521 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,525 sqft Built 2002
Raw Value $701,261
Adjusted Value $666,849

Adjusted -$34,412 for 98 sqft less living space. Net adjustment: -$34,412.

15512 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,321 sqft Built 2004
Raw Value $641,904
Adjusted Value $676,340

Adjusted +$37,222 for 106 sqft more living space and -$2,786 for being older. Net adjustment: +$34,436.

15508 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,636 sqft Built 2002
Raw Value $616,931
Adjusted Value $543,541

Adjusted -$73,390 for 209 sqft less living space. Net adjustment: -$73,390.

15516 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,477 sqft Built 2002
Raw Value $737,691
Adjusted Value $720,134

Adjusted -$17,557 for 50 sqft less living space. Net adjustment: -$17,557.

The Neighborhood

This home is valued 7.2% below the R251501D - Avery Ranch South median of $708,305. That positions it competitively for buyers comparing within the neighborhood. 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
$657,530
Median
$708,305

This home is -7.2% below the subdivision median.

Tax Analysis

The estimated annual property tax is $12,830 across all districts. With a homestead exemption claimed, that drops to $10,769 — saving $2,061 per year. That's $897 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%$5,872
AustinCity0.5240%$3,446
Williamson CountyCounty0.3694%$2,429
Austin Community Collegespecial0.1034%$680
Williamson County FM/RdCounty0.0443%$291
Upper Brushy Creek WCIDWater0.0170%$112
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$12,830

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $666,849 would pay approximately $4,162 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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