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

1510 FOPPIANO LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath2,860 sqftBuilt 2002

Property at a Glance

This home is estimated between $517,914 and $823,717, with a best estimate of $724,633. That places the property above the R530506E - SONOMA ALL SECTIONS median of $451,534, in a neighborhood that declined 7.0% over the past year.

Estimated Value Range

$517,914 $823,717
Best Estimate
$724,633
WCAD Value
$483,142
Medium Confidence

Based on 5 comparable properties(3 in the same subdivision)

Based on 5 comparable properties (3 in the same subdivision, 2 nearby), the estimated range is $517,914 and $823,717. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

1514 FOPPIANO LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 2 bath 2,441 sqft Built 2002
Raw Value $431,812
Adjusted Value $544,096

Adjusted +$112,284 for 419 sqft more living space. Net adjustment: +$112,284.

1504 FOPPIANO LOOP, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
4 bed 2 bath 2,932 sqft Built 2002
Raw Value $537,209
Adjusted Value $517,914

Adjusted -$19,295 for 72 sqft less living space. Net adjustment: -$19,295.

1506 FOPPIANO LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 3 bath 2,058 sqft Built 2003
Raw Value $614,228
Adjusted Value $823,717

Adjusted +$214,921 for 802 sqft more living space and -$5,432 for being older. Net adjustment: +$209,489.

4 bed 2 bath 2,306 sqft Built 1997
Raw Value $551,571
Adjusted Value $727,194

Adjusted +$148,462 for 554 sqft more living space and +$27,161 for being newer. Net adjustment: +$175,623.

4 bed 2 bath 1,977 sqft Built 2000
Raw Value $477,141
Adjusted Value $724,633

Adjusted +$236,628 for 883 sqft more living space and +$10,864 for being newer. Net adjustment: +$247,492.

The Neighborhood

This home is valued 7.0% above the R530506E - SONOMA ALL SECTIONS median of $451,534. With 1,029 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 7.0% over the past year.

R530506E - SONOMA ALL SECTIONS

typical
1,029 Properties
$451,534 Median Value
-7.0% YoY Change
2% Have Pool
100% Have Garage
This Home
$483,142
Median
$451,534

This home is +7.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,693 across all districts. With a homestead exemption claimed, that drops to $7,353 — saving $1,340 per year. That's $613 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%$4,315
Round RockCity0.3720%$1,797
Williamson CountyCounty0.3694%$1,785
Austin Community Collegespecial0.1034%$500
Williamson County FM/RdCounty0.0443%$214
Upper Brushy Creek WCIDWater0.0170%$82
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,693

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $724,633 would pay approximately $4,523 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