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15508 FISHER ISLAND DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed2 bath2,058 sqftBuilt 2005

Property at a Glance

This home is estimated between $456,493 and $921,925, with a best estimate of $587,285. 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

$456,493 $921,925
Best Estimate
$587,285
WCAD Value
$737,575
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 $456,493 and $921,925. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15504 FISHER ISLAND DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,541 sqft Built 2004
Raw Value $624,704
Adjusted Value $456,493

Adjusted -$169,604 for 483 sqft less living space and +$1,393 for being newer. Net adjustment: -$168,211.

15509 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 2,350 sqft Built 2003
Raw Value $647,670
Adjusted Value $547,921

Adjusted -$102,535 for 292 sqft less living space and +$2,786 for being newer. Net adjustment: -$99,749.

15516 FISHER ISLAND DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 3 bath 2,492 sqft Built 2004
Raw Value $738,290
Adjusted Value $587,285

Adjusted -$152,398 for 434 sqft less living space and +$1,393 for being newer. Net adjustment: -$151,005.

15505 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
5 bed 2 bath 1,602 sqft Built 2004
Raw Value $611,949
Adjusted Value $773,465

Adjusted +$160,123 for 456 sqft more living space and +$1,393 for being newer. Net adjustment: +$161,516.

15509 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,518 sqft Built 2004
Raw Value $730,913
Adjusted Value $921,925

Adjusted +$189,619 for 540 sqft more living space and +$1,393 for being newer. Net adjustment: +$191,012.

The Neighborhood

This home is valued 4.1% 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
$737,575
Median
$708,305

This home is +4.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,392 across all districts. With a homestead exemption claimed, that drops to $12,233 — saving $2,159 per year. That's $1,019 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%$6,587
AustinCity0.5240%$3,865
Williamson CountyCounty0.3694%$2,725
Austin Community Collegespecial0.1034%$763
Williamson County FM/RdCounty0.0443%$327
Upper Brushy Creek WCIDWater0.0170%$125
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$14,392

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $587,285 would pay approximately $3,666 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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