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15505 FISHER ISLAND DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

5 bed2 bath1,602 sqftBuilt 2004

Property at a Glance

This home is estimated between $560,748 and $844,405, with a best estimate of $626,901. 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

$560,748 $844,405
Best Estimate
$626,901
WCAD Value
$611,949
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 $560,748 and $844,405. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15501 FISHER ISLAND DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
4 bed 3 bath 1,341 sqft Built 2003
Raw Value $751,363
Adjusted Value $844,405

Adjusted +$91,649 for 261 sqft more living space and +$1,393 for being newer. Net adjustment: +$93,042.

15509 FISHER ISLAND DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,518 sqft Built 2004
Raw Value $730,913
Adjusted Value $760,409

Adjusted +$29,496 for 84 sqft more living space. Net adjustment: +$29,496.

15500 FERNHILL DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,944 sqft Built 2003
Raw Value $745,600
Adjusted Value $626,901

Adjusted -$120,092 for 342 sqft less living space and +$1,393 for being newer. Net adjustment: -$118,699.

15513 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 2,167 sqft Built 2004
Raw Value $759,146
Adjusted Value $560,748

Adjusted -$198,398 for 565 sqft less living space. Net adjustment: -$198,398.

15508 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 2,058 sqft Built 2005
Raw Value $737,575
Adjusted Value $576,059

Adjusted -$160,123 for 456 sqft less living space and -$1,393 for being older. Net adjustment: -$161,516.

The Neighborhood

This home is valued 13.6% 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
$611,949
Median
$708,305

This home is -13.6% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,941 across all districts. With a homestead exemption claimed, that drops to $9,936 — saving $2,005 per year. That's $828 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%$5,465
AustinCity0.5240%$3,207
Williamson CountyCounty0.3694%$2,261
Austin Community Collegespecial0.1034%$633
Williamson County FM/RdCounty0.0443%$271
Upper Brushy Creek WCIDWater0.0170%$104
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$11,941

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $626,901 would pay approximately $3,913 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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