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400 SOUTHERN CARINA DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,404 sqftBuilt 2017

Property at a Glance

This home is estimated between $608,694 and $1,035,026, with a best estimate of $819,874. That places the property below the R304615B - HIGHLAND HORIZON PH3 median of $1,296,229, in a neighborhood that declined 3.4% over the past year.

Estimated Value Range

$608,694 $1,035,026
Best Estimate
$819,874
WCAD Value
$1,330,513
Low Confidence

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

There are 5 comparable properties within range, but few are in R304615B - HIGHLAND HORIZON PH3. The estimated range of $608,694 and $1,035,026 should be treated as a rough guide.

Comparable Properties (5)

404 SOUTHERN CARINA DR, ROUND ROCK, TX 78681
0.00 mi 99% similar Same subdivision
6 bed 6 bath 3,126 sqft Built 2016
Raw Value $1,346,533
Adjusted Value $1,035,026

Adjusted -$311,507 for 722 sqft less living space. Net adjustment: -$311,507.

408 SOUTHERN CARINA DR, ROUND ROCK, TX 78681
0.00 mi 98% similar Same subdivision
4 bed 4 bath 3,980 sqft Built 2016
Raw Value $1,288,659
Adjusted Value $608,694

Adjusted -$679,965 for 1,576 sqft less living space. Net adjustment: -$679,965.

4 bed 3 bath 2,249 sqft Built 2014
Raw Value $752,999
Adjusted Value $819,874

Adjusted +$66,875 for 155 sqft more living space. Net adjustment: +$66,875.

3 bed 2,110 sqft Built 2014
Raw Value $633,183
Adjusted Value $760,029

Adjusted +$126,846 for 294 sqft more living space. Net adjustment: +$126,846.

4 bed 3 bath 1,793 sqft Built 2014
Raw Value $712,166
Adjusted Value $975,782

Adjusted +$263,616 for 611 sqft more living space. Net adjustment: +$263,616.

The Neighborhood

This home is valued 2.6% above the R304615B - HIGHLAND HORIZON PH3 median of $1,296,229. With 27 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 3.4% over the past year.

R304615B - HIGHLAND HORIZON PH3

typical
27 Properties
$1,296,229 Median Value
-3.4% YoY Change
0% Have Pool
100% Have Garage
This Home
$1,330,513
Median
$1,296,229

This home is +2.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $26,665 across all districts. With a homestead exemption claimed, that drops to $25,169 — saving $1,496 per year. That's $2,097 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%$11,883
Brushy Creek MUDMUD0.3868%$5,147
Williamson CountyCounty0.3694%$4,916
Austin Community Collegespecial0.1034%$1,376
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$1,331
Brushy Creek MUD Defined AreaMUD0.0900%$1,197
Williamson County FM/RdCounty0.0443%$590
Upper Brushy Creek WCIDWater0.0170%$226
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0041%$26,665

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $819,874 would pay approximately $5,118 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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