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

66 TWIN RIDGE PKWY, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,830 sqftBuilt 1986

Property at a Glance

This home is estimated between $446,168 and $947,514, with a best estimate of $660,722. That places the property below the R563694C - Oak Bluff Estates Ph 2 median of $741,250, in a neighborhood that appreciated 3.7% over the past year.

Estimated Value Range

$446,168 $947,514
Best Estimate
$660,722
WCAD Value
$738,578
High Confidence

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

Based on 5 comparable properties in R563694C - Oak Bluff Estates Ph 2, this home's estimated market value is between $446,168 and $947,514. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

74 TWIN RIDGE PKWY, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,530 sqft Built 1992
Raw Value $859,719
Adjusted Value $623,252

Adjusted -$228,611 for 700 sqft less living space and -$7,856 for being older. Net adjustment: -$236,467.

55 TWIN RIDGE PKWY, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,455 sqft Built 1993
Raw Value $834,210
Adjusted Value $947,514

Adjusted +$122,470 for 375 sqft more living space and -$9,166 for being older. Net adjustment: +$113,304.

78 TWIN RIDGE PKWY, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,381 sqft Built 1988
Raw Value $628,736
Adjusted Value $446,168

Adjusted -$179,949 for 551 sqft less living space and -$2,619 for being older. Net adjustment: -$182,568.

72 TWIN RIDGE PKWY, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,994 sqft Built 1988
Raw Value $716,901
Adjusted Value $660,722

Adjusted -$53,560 for 164 sqft less living space and -$2,619 for being older. Net adjustment: -$56,179.

63 TWIN RIDGE PKWY, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,546 sqft Built 1993
Raw Value $765,848
Adjusted Value $849,433

Adjusted +$92,751 for 284 sqft more living space and -$9,166 for being older. Net adjustment: +$83,585.

The Neighborhood

This home is in line with the R563694C - Oak Bluff Estates Ph 2 median of $741,250. The neighborhood appreciated 3.7% over the past year.

R563694C - Oak Bluff Estates Ph 2

typical
341 Properties
$741,250 Median Value
+3.7% YoY Change
1% Have Pool
99% Have Garage
This Home
$738,578
Median
$741,250

This home is -0.4% below the subdivision median.

Tax Analysis

The estimated annual property tax is $13,289 across all districts. With a homestead exemption claimed, that drops to $11,902 — saving $1,387 per year. That's $992 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%$6,596
Round RockCity0.3720%$2,748
Williamson CountyCounty0.3694%$2,729
Austin Community Collegespecial0.1034%$764
Williamson County FM/RdCounty0.0443%$327
Upper Brushy Creek WCIDWater0.0170%$126
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$13,289

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $660,722 would pay approximately $4,124 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