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

15621 BELFIN DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed2 bath1,355 sqftBuilt 2005

Property at a Glance

This home is estimated between $256,406 and $705,153, with a best estimate of $589,692. 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

$256,406 $705,153
Best Estimate
$589,692
WCAD Value
$637,320
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 $256,406 and $705,153. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

15617 BELFIN DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,301 sqft Built 2005
Raw Value $588,591
Adjusted Value $256,406

Adjusted -$332,185 for 946 sqft less living space. Net adjustment: -$332,185.

15613 BELFIN DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,875 sqft Built 2005
Raw Value $772,289
Adjusted Value $589,692

Adjusted -$182,597 for 520 sqft less living space. Net adjustment: -$182,597.

15701 BELFIN DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 3 bath 1,540 sqft Built 2005
Raw Value $718,922
Adjusted Value $653,960

Adjusted -$64,962 for 185 sqft less living space. Net adjustment: -$64,962.

15705 BELFIN DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
3 bed 2 bath 1,361 sqft Built 2005
Raw Value $707,260
Adjusted Value $705,153

Adjusted -$2,107 for 6 sqft less living space. Net adjustment: -$2,107.

15612 BELFIN DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
3 bed 2 bath 2,112 sqft Built 2005
Raw Value $572,062
Adjusted Value $306,244

Adjusted -$265,818 for 757 sqft less living space. Net adjustment: -$265,818.

The Neighborhood

This home is valued 10.0% 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
$637,320
Median
$708,305

This home is -10.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $12,436 across all districts. With a homestead exemption claimed, that drops to $10,400 — saving $2,036 per year. That's $867 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%$5,692
AustinCity0.5240%$3,340
Williamson CountyCounty0.3694%$2,355
Austin Community Collegespecial0.1034%$659
Williamson County FM/RdCounty0.0443%$283
Upper Brushy Creek WCIDWater0.0170%$108
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$12,436

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $589,692 would pay approximately $3,681 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