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2021 WESTVALLEY PL, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath2,662 sqftBuilt 2007

Property at a Glance

This home is estimated between $390,724 and $901,805, with a best estimate of $487,587. That places the property below the R420606C - TERAVISTA R5 median of $646,108, in a neighborhood that appreciated 2.5% over the past year.

Estimated Value Range

$390,724 $901,805
Best Estimate
$487,587
WCAD Value
$767,436
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R420606C - TERAVISTA R5. The estimated range of $390,724 and $901,805 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 2,754 sqft Built 2017
Raw Value $619,037
Adjusted Value $528,837

Adjusted -$26,620 for 92 sqft less living space and -$63,580 for being older. Net adjustment: -$90,200.

4 bed 3 bath 2,928 sqft Built 2016
Raw Value $553,112
Adjusted Value $418,924

Adjusted -$76,966 for 266 sqft less living space and -$57,222 for being older. Net adjustment: -$134,188.

4 bed 3 bath 2,805 sqft Built 2022
Raw Value $527,470
Adjusted Value $390,724

Adjusted -$41,376 for 143 sqft less living space and -$95,370 for being older. Net adjustment: -$136,746.

4 bed 3 bath 2,828 sqft Built 2022
Raw Value $630,988
Adjusted Value $487,587

Adjusted -$48,031 for 166 sqft less living space and -$95,370 for being older. Net adjustment: -$143,401.

4 bed 4 bath 3,213 sqft Built 2015
Raw Value $1,112,098
Adjusted Value $901,805

Adjusted -$159,429 for 551 sqft less living space and -$50,864 for being older. Net adjustment: -$210,293.

The Neighborhood

This home is valued 18.8% above the R420606C - TERAVISTA R5 median of $646,108. With 622 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 2.5% over the past year.

R420606C - TERAVISTA R5

above average
622 Properties
$646,108 Median Value
+2.5% YoY Change
1% Have Pool
99% Have Garage
This Home
$767,436
Median
$646,108

This home is +18.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,526 across all districts. With a homestead exemption claimed, that drops to $13,134 — saving $1,392 per year. That's $1,095 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%$6,854
Williamson CountyCounty0.3694%$2,835
Williamson County MUD #11MUD0.3656%$2,806
Austin Community Collegespecial0.1034%$794
Williamson County ESD #9 - Round RockESD0.0999%$767
Williamson County FM/RdCounty0.0443%$340
Upper Brushy Creek WCIDWater0.0170%$130
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8928%$14,526

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $487,587 would pay approximately $3,044 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 4/19/2026.

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