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8 VALLEY TRL, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath2,378 sqftBuilt 1996

Property at a Glance

This home is estimated between $462,530 and $590,537, with a best estimate of $497,782. 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

$462,530 $590,537
Best Estimate
$497,782
WCAD Value
$1,066,112
Low Confidence

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

There are 5 comparable properties within range, but none are in R575583D - RR Rual Sub 122 & Gattis School Rd Area. The estimated range of $462,530 and $590,537 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,946 sqft Built 1999
Raw Value $358,711
Adjusted Value $497,782

Adjusted +$139,033 for 432 sqft more living space and +$38 for being newer. Net adjustment: +$139,071.

3 bed 2 bath 1,920 sqft Built 1999
Raw Value $339,562
Adjusted Value $487,000

Adjusted +$147,400 for 458 sqft more living space and +$38 for being newer. Net adjustment: +$147,438.

3 bed 2 bath 2,650 sqft Built 2014
Raw Value $549,843
Adjusted Value $462,530

Adjusted -$87,539 for 272 sqft less living space and +$226 for being newer. Net adjustment: -$87,313.

3 bed 2 bath 2,023 sqft Built 2010
Raw Value $455,279
Adjusted Value $569,706

Adjusted +$114,251 for 355 sqft more living space and +$176 for being newer. Net adjustment: +$114,427.

3 bed 2 bath 1,730 sqft Built 2000
Raw Value $381,938
Adjusted Value $590,537

Adjusted +$208,549 for 648 sqft more living space and +$50 for being newer. Net adjustment: +$208,599.

The Neighborhood

This home is valued 45.2% 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

above average
213 Properties
$734,399 Median Value
+3.8% YoY Change
4% Have Pool
68% Have Garage
This Home
$1,066,112
Median
$734,399

This home is +45.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,334 across all districts. With a homestead exemption claimed, that drops to $12,911 — saving $1,423 per year. That's $1,076 per month a buyer should budget. The assessed value increased +24.9% vs the subdivision average of +3.8%. This above-average increase gives a protest opportunity score of 100 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$8,383
Williamson CountyCounty0.3694%$3,468
Austin Community Collegespecial0.1034%$971
Williamson County ESD #9 - Round RockESD0.0999%$938
Williamson County FM/RdCounty0.0443%$416
Upper Brushy Creek WCIDWater0.0170%$160
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$14,334
100 / 100

There may be a strong case to protest this appraisal.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $497,782 would pay approximately $3,107 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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