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15517 FISHER ISLAND DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed3 bath2,299 sqftBuilt 2004

Property at a Glance

This home is estimated between $805,497 and $916,155, with a best estimate of $879,619. 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

$805,497 $916,155
Best Estimate
$879,619
WCAD Value
$651,878
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 $805,497 and $916,155. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15513 FISHER ISLAND DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
4 bed 2 bath 2,167 sqft Built 2004
Raw Value $759,146
Adjusted Value $805,497

Adjusted +$46,351 for 132 sqft more living space. Net adjustment: +$46,351.

15508 FERNHILL DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,919 sqft Built 2005
Raw Value $784,112
Adjusted Value $916,155

Adjusted +$133,436 for 380 sqft more living space and -$1,393 for being older. Net adjustment: +$132,043.

15525 FISHER ISLAND DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,739 sqft Built 2003
Raw Value $705,615
Adjusted Value $903,650

Adjusted +$196,642 for 560 sqft more living space and +$1,393 for being newer. Net adjustment: +$198,035.

15504 FERNHILL DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 4 bath 2,063 sqft Built 2004
Raw Value $796,748
Adjusted Value $879,619

Adjusted +$82,871 for 236 sqft more living space. Net adjustment: +$82,871.

15520 FISHER ISLAND DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
4 bed 2 bath 2,050 sqft Built 2003
Raw Value $756,921
Adjusted Value $845,750

Adjusted +$87,436 for 249 sqft more living space and +$1,393 for being newer. Net adjustment: +$88,829.

The Neighborhood

This home is valued 8.0% 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
$651,878
Median
$708,305

This home is -8.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $12,720 across all districts. With a homestead exemption claimed, that drops to $10,666 — saving $2,054 per year. That's $889 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%$5,822
AustinCity0.5240%$3,416
Williamson CountyCounty0.3694%$2,408
Austin Community Collegespecial0.1034%$674
Williamson County FM/RdCounty0.0443%$289
Upper Brushy Creek WCIDWater0.0170%$111
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$12,720

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $879,619 would pay approximately $5,491 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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