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15436 FISHER ISLAND DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed2 bath1,875 sqftBuilt 2004

Property at a Glance

This home is estimated between $750,118 and $914,891, with a best estimate of $851,981. 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

$750,118 $914,891
Best Estimate
$851,981
WCAD Value
$725,265
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 $750,118 and $914,891. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15432 FISHER ISLAND DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,276 sqft Built 2004
Raw Value $641,644
Adjusted Value $851,981

Adjusted +$210,337 for 599 sqft more living space. Net adjustment: +$210,337.

15437 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,337 sqft Built 2004
Raw Value $725,974
Adjusted Value $914,891

Adjusted +$188,917 for 538 sqft more 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 $750,118

Adjusted +$24,931 for 71 sqft more living space and +$1,393 for being newer. Net adjustment: +$26,324.

15428 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,551 sqft Built 2004
Raw Value $661,031
Adjusted Value $774,803

Adjusted +$113,772 for 324 sqft more living space. Net adjustment: +$113,772.

15433 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,460 sqft Built 2003
Raw Value $724,401
Adjusted Value $871,520

Adjusted +$145,726 for 415 sqft more living space and +$1,393 for being newer. Net adjustment: +$147,119.

The Neighborhood

This home is valued 2.4% 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
$725,265
Median
$708,305

This home is +2.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,152 across all districts. With a homestead exemption claimed, that drops to $12,008 — saving $2,144 per year. That's $1,001 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%$6,477
AustinCity0.5240%$3,801
Williamson CountyCounty0.3694%$2,679
Austin Community Collegespecial0.1034%$750
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%$14,152

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $851,981 would pay approximately $5,318 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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