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15501 FISHER ISLAND DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed3 bath1,341 sqftBuilt 2003

Property at a Glance

This home is estimated between $481,990 and $667,367, with a best estimate of $638,102. 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

$481,990 $667,367
Best Estimate
$638,102
WCAD Value
$751,363
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 $481,990 and $667,367. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15505 FISHER ISLAND DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
5 bed 2 bath 1,602 sqft Built 2004
Raw Value $611,949
Adjusted Value $518,907

Adjusted -$91,649 for 261 sqft less living space and -$1,393 for being older. Net adjustment: -$93,042.

15509 FISHER ISLAND DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,518 sqft Built 2004
Raw Value $730,913
Adjusted Value $667,367

Adjusted -$62,153 for 177 sqft less living space and -$1,393 for being older. Net adjustment: -$63,546.

15433 FISHER ISLAND DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
4 bed 3 bath 2,098 sqft Built 2004
Raw Value $749,201
Adjusted Value $481,990

Adjusted -$265,818 for 757 sqft less living space and -$1,393 for being older. Net adjustment: -$267,211.

15500 FISHER ISLAND DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,260 sqft Built 2004
Raw Value $611,052
Adjusted Value $638,102

Adjusted +$28,443 for 81 sqft more living space and -$1,393 for being older. Net adjustment: +$27,050.

15512 FISHER ISLAND DR, AUSTIN, TX 78717
0.05 mi 100% similar Same subdivision
3 bed 2 bath 1,321 sqft Built 2004
Raw Value $641,904
Adjusted Value $647,534

Adjusted +$7,023 for 20 sqft more living space and -$1,393 for being older. Net adjustment: +$5,630.

The Neighborhood

This home is valued 6.1% 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
$751,363
Median
$708,305

This home is +6.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,661 across all districts. With a homestead exemption claimed, that drops to $12,485 — saving $2,176 per year. That's $1,040 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%$6,710
AustinCity0.5240%$3,937
Williamson CountyCounty0.3694%$2,776
Austin Community Collegespecial0.1034%$777
Williamson County FM/RdCounty0.0443%$333
Upper Brushy Creek WCIDWater0.0170%$128
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$14,661

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $638,102 would pay approximately $3,983 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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