Beta Williamson County, TX only — data and coverage are limited during early access.

15805 BELFIN DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed3 bath1,607 sqftBuilt 2005

Property at a Glance

This home is estimated between $420,785 and $724,879, with a best estimate of $660,849. 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

$420,785 $724,879
Best Estimate
$660,849
WCAD Value
$657,467
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 $420,785 and $724,879. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15813 BELFIN DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 3 bath 1,361 sqft Built 2005
Raw Value $638,497
Adjusted Value $724,879

Adjusted +$86,382 for 246 sqft more living space. Net adjustment: +$86,382.

9213 LAGUNA WOODS DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 3 bath 2,519 sqft Built 2007
Raw Value $743,817
Adjusted Value $420,785

Adjusted -$320,246 for 912 sqft less living space and -$2,786 for being older. Net adjustment: -$323,032.

9216 CASTLE PINES DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 3 bath 2,409 sqft Built 2006
Raw Value $714,903
Adjusted Value $431,890

Adjusted -$281,620 for 802 sqft less living space and -$1,393 for being older. Net adjustment: -$283,013.

15808 BELFIN DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 3 bath 1,377 sqft Built 2005
Raw Value $640,243
Adjusted Value $721,007

Adjusted +$80,764 for 230 sqft more living space. Net adjustment: +$80,764.

9209 LAGUNA WOODS DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 3 bath 1,842 sqft Built 2007
Raw Value $746,155
Adjusted Value $660,849

Adjusted -$82,520 for 235 sqft less living space and -$2,786 for being older. Net adjustment: -$85,306.

The Neighborhood

This home is valued 7.2% 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
$657,467
Median
$708,305

This home is -7.2% below the subdivision median.

Tax Analysis

The estimated annual property tax is $12,829 across all districts. With a homestead exemption claimed, that drops to $10,768 — saving $2,061 per year. That's $897 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%$5,872
AustinCity0.5240%$3,445
Williamson CountyCounty0.3694%$2,429
Austin Community Collegespecial0.1034%$680
Williamson County FM/RdCounty0.0443%$291
Upper Brushy Creek WCIDWater0.0170%$112
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$12,829

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $660,849 would pay approximately $4,125 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.

View full property details