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

1523 FOPPIANO LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath2,289 sqftBuilt 2004

Property at a Glance

This home is estimated between $329,365 and $398,705, with a best estimate of $391,819. That places the property below the R530506E - SONOMA ALL SECTIONS median of $451,534, in a neighborhood that declined 7.0% over the past year.

Estimated Value Range

$329,365 $398,705
Best Estimate
$391,819
WCAD Value
$585,067
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in R530506E - SONOMA ALL SECTIONS. The estimated range of $329,365 and $398,705 should be treated as a rough guide.

Comparable Properties (5)

1515 FOPPIANO LOOP, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,953 sqft Built 2004
Raw Value $507,305
Adjusted Value $329,365

Adjusted -$177,940 for 664 sqft less living space. Net adjustment: -$177,940.

1519 FOPPIANO LOOP, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,266 sqft Built 2004
Raw Value $392,541
Adjusted Value $398,705

Adjusted +$6,164 for 23 sqft more living space. Net adjustment: +$6,164.

3 bed 2 bath 2,294 sqft Built 1999
Raw Value $368,283
Adjusted Value $394,104

Adjusted -$1,340 for 5 sqft less living space and +$27,161 for being newer. Net adjustment: +$25,821.

3 bed 2 bath 2,343 sqft Built 1999
Raw Value $379,129
Adjusted Value $391,819

Adjusted -$14,471 for 54 sqft less living space and +$27,161 for being newer. Net adjustment: +$12,690.

3 bed 2 bath 2,343 sqft Built 1998
Raw Value $371,433
Adjusted Value $389,555

Adjusted -$14,471 for 54 sqft less living space and +$32,593 for being newer. Net adjustment: +$18,122.

The Neighborhood

This home is valued 29.6% 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

above average
1,029 Properties
$451,534 Median Value
-7.0% YoY Change
2% Have Pool
100% Have Garage
This Home
$585,067
Median
$451,534

This home is +29.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,527 across all districts. With a homestead exemption claimed, that drops to $9,169 — saving $1,358 per year. That's $764 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%$5,225
Round RockCity0.3720%$2,176
Williamson CountyCounty0.3694%$2,162
Austin Community Collegespecial0.1034%$605
Williamson County FM/RdCounty0.0443%$259
Upper Brushy Creek WCIDWater0.0170%$99
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,527

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $391,819 would pay approximately $2,446 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