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15408 FISHER ISLAND DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed3 bath2,056 sqftBuilt 2004

Property at a Glance

This home is estimated between $492,879 and $701,938, with a best estimate of $509,948. 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

$492,879 $701,938
Best Estimate
$509,948
WCAD Value
$729,426
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 $492,879 and $701,938. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15412 FISHER ISLAND DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,369 sqft Built 2004
Raw Value $602,788
Adjusted Value $492,879

Adjusted -$109,909 for 313 sqft less living space. Net adjustment: -$109,909.

15400 FISHER ISLAND DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,281 sqft Built 2003
Raw Value $587,563
Adjusted Value $509,948

Adjusted -$79,008 for 225 sqft less living space and +$1,393 for being newer. Net adjustment: -$77,615.

15409 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 3 bath 2,153 sqft Built 2001
Raw Value $731,821
Adjusted Value $701,938

Adjusted -$34,061 for 97 sqft less living space and +$4,178 for being newer. Net adjustment: -$29,883.

15416 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
3 bed 2 bath 2,314 sqft Built 2004
Raw Value $588,158
Adjusted Value $497,562

Adjusted -$90,596 for 258 sqft less living space. Net adjustment: -$90,596.

15401 WHISTLING STRAITS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 3 bath 2,342 sqft Built 2001
Raw Value $745,554
Adjusted Value $649,304

Adjusted -$100,428 for 286 sqft less living space and +$4,178 for being newer. Net adjustment: -$96,250.

The Neighborhood

This home is valued 3.0% 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
$729,426
Median
$708,305

This home is +3.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,233 across all districts. With a homestead exemption claimed, that drops to $12,084 — saving $2,149 per year. That's $1,007 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%$6,515
AustinCity0.5240%$3,822
Williamson CountyCounty0.3694%$2,695
Austin Community Collegespecial0.1034%$754
Williamson County FM/RdCounty0.0443%$323
Upper Brushy Creek WCIDWater0.0170%$124
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$14,233

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $509,948 would pay approximately $3,183 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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