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

1016 TWIN TERRACE CT, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath1,545 sqftBuilt 1999

Property at a Glance

This home is estimated between $482,670 and $624,533, with a best estimate of $510,261. That places the property below the R501598E - Forest Ridge, Small Lots median of $533,875, in a neighborhood that appreciated 4.6% over the past year.

Estimated Value Range

$482,670 $624,533
Best Estimate
$510,261
WCAD Value
$580,309
High Confidence

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

Based on 5 comparable properties in R501598E - Forest Ridge, Small Lots, this home's estimated market value is between $482,670 and $624,533. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

1022 TWIN TERRACE CT, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,629 sqft Built 1999
Raw Value $651,984
Adjusted Value $624,533

Adjusted -$27,451 for 84 sqft less living space. Net adjustment: -$27,451.

1019 TWIN TERRACE CT, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,713 sqft Built 1999
Raw Value $537,573
Adjusted Value $482,670

Adjusted -$54,903 for 168 sqft less living space. Net adjustment: -$54,903.

1017 TWIN TERRACE CT, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,657 sqft Built 1999
Raw Value $541,510
Adjusted Value $504,908

Adjusted -$36,602 for 112 sqft less living space. Net adjustment: -$36,602.

1012 TWIN TERRACE CT, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,242 sqft Built 1999
Raw Value $489,202
Adjusted Value $588,223

Adjusted +$99,021 for 303 sqft more living space. Net adjustment: +$99,021.

1020 TWIN TERRACE CT, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,644 sqft Built 1999
Raw Value $542,614
Adjusted Value $510,261

Adjusted -$32,353 for 99 sqft less living space. Net adjustment: -$32,353.

The Neighborhood

This home is valued 8.7% above the R501598E - Forest Ridge, Small Lots median of $533,875. With 269 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 4.6% over the past year.

R501598E - Forest Ridge, Small Lots

typical
269 Properties
$533,875 Median Value
+4.6% YoY Change
0% Have Pool
99% Have Garage
This Home
$580,309
Median
$533,875

This home is +8.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,441 across all districts. With a homestead exemption claimed, that drops to $9,084 — saving $1,357 per year. That's $757 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%$5,183
Round RockCity0.3720%$2,159
Williamson CountyCounty0.3694%$2,144
Austin Community Collegespecial0.1034%$600
Williamson County FM/RdCounty0.0443%$257
Upper Brushy Creek WCIDWater0.0170%$99
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,441

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $510,261 would pay approximately $3,185 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