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2815 PIPER SONOMA PL, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath2,100 sqftBuilt 2007

Property at a Glance

This home is estimated between $279,312 and $616,899, with a best estimate of $539,820. 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

$279,312 $616,899
Best Estimate
$539,820
WCAD Value
$606,386
High Confidence

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

Based on 5 comparable properties in R530506E - SONOMA ALL SECTIONS, this home's estimated market value is between $279,312 and $616,899. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

2827 PIPER SONOMA PL, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,965 sqft Built 2007
Raw Value $511,116
Adjusted Value $279,312

Adjusted -$231,804 for 865 sqft less living space. Net adjustment: -$231,804.

2830 PIPER SONOMA PL, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,220 sqft Built 2006
Raw Value $643,625
Adjusted Value $616,899

Adjusted -$32,158 for 120 sqft less living space and +$5,432 for being newer. Net adjustment: -$26,726.

2823 PIPER SONOMA PL, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,750 sqft Built 2006
Raw Value $476,497
Adjusted Value $289,044

Adjusted -$174,188 for 650 sqft less living space and +$5,432 for being newer and -$18,697 for no pool. Net adjustment: -$187,453.

2819 PIPER SONOMA PL, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,050 sqft Built 2006
Raw Value $520,989
Adjusted Value $539,820

Adjusted +$13,399 for 50 sqft more living space and +$5,432 for being newer. Net adjustment: +$18,831.

2838 PIPER SONOMA PL, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,204 sqft Built 2006
Raw Value $625,448
Adjusted Value $603,010

Adjusted -$27,870 for 104 sqft less living space and +$5,432 for being newer. Net adjustment: -$22,438.

The Neighborhood

This home is valued 34.3% 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
$606,386
Median
$451,534

This home is +34.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,911 across all districts. With a homestead exemption claimed, that drops to $9,548 — saving $1,363 per year. That's $796 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%$5,416
Round RockCity0.3720%$2,256
Williamson CountyCounty0.3694%$2,240
Austin Community Collegespecial0.1034%$627
Williamson County FM/RdCounty0.0443%$269
Upper Brushy Creek WCIDWater0.0170%$103
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,911

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $539,820 would pay approximately $3,370 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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