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12 VALLEY TRL, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,859 sqftBuilt 1977

Property at a Glance

This home is estimated between $355,016 and $850,454, with a best estimate of $460,117. That places the property below the R575583D - RR Rual Sub 122 & Gattis School Rd Area median of $734,399, in a neighborhood that appreciated 3.8% over the past year.

Estimated Value Range

$355,016 $850,454
Best Estimate
$460,117
WCAD Value
$755,622
Low Confidence

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

There are 5 comparable properties within range, but few are in R575583D - RR Rual Sub 122 & Gattis School Rd Area. The estimated range of $355,016 and $850,454 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,703 sqft Built 1975
Raw Value $359,161
Adjusted Value $409,342

Adjusted +$50,206 for 156 sqft more living space and -$25 for being older. Net adjustment: +$50,181.

1 VALLEY TRL, ROUND ROCK, TX 78664
0.00 mi 97% similar Same subdivision
3 bed 3 bath 2,227 sqft Built 1994
Raw Value $968,675
Adjusted Value $850,454

Adjusted -$118,435 for 368 sqft less living space and +$214 for being newer. Net adjustment: -$118,221.

3 VALLEY TRL, ROUND ROCK, TX 78664
0.00 mi 96% similar Same subdivision
3 bed 1,978 sqft Built 2013
Raw Value $564,335
Adjusted Value $526,490

Adjusted -$38,298 for 119 sqft less living space and +$453 for being newer. Net adjustment: -$37,845.

4 bed 2 bath 2,243 sqft Built 1977
Raw Value $478,601
Adjusted Value $355,016

Adjusted -$123,585 for 384 sqft less living space. Net adjustment: -$123,585.

3 bed 2 bath 1,424 sqft Built 1971
Raw Value $320,194
Adjusted Value $460,117

Adjusted +$139,998 for 435 sqft more living space and -$75 for being older. Net adjustment: +$139,923.

The Neighborhood

This home is valued 2.9% above the R575583D - RR Rual Sub 122 & Gattis School Rd Area median of $734,399. With 213 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 3.8% over the past year.

R575583D - RR Rual Sub 122 & Gattis School Rd Area

typical
213 Properties
$734,399 Median Value
+3.8% YoY Change
4% Have Pool
68% Have Garage
This Home
$755,622
Median
$734,399

This home is +2.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,966 across all districts. With a homestead exemption claimed, that drops to $9,583 — saving $1,383 per year. That's $799 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%$6,413
Williamson CountyCounty0.3694%$2,653
Austin Community Collegespecial0.1034%$742
Williamson County ESD #9 - Round RockESD0.0999%$717
Williamson County FM/RdCounty0.0443%$318
Upper Brushy Creek WCIDWater0.0170%$122
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$10,966

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $460,117 would pay approximately $2,872 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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