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521 CARINA DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath2,203 sqftBuilt 2015

Property at a Glance

This home is estimated between $428,670 and $999,196, with a best estimate of $663,224. That places the property below the R302609C - HIGHLAND HORIZON median of $781,434, in a neighborhood that appreciated 2.3% over the past year.

Estimated Value Range

$428,670 $999,196
Best Estimate
$663,224
WCAD Value
$707,647
Low Confidence

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

There are 5 comparable properties within range, but none are in R302609C - HIGHLAND HORIZON. The estimated range of $428,670 and $999,196 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 2,248 sqft Built 2018
Raw Value $479,901
Adjusted Value $428,670

Adjusted -$13,920 for 45 sqft less living space and -$37,311 for being older. Net adjustment: -$51,231.

3 bed 2 bath 2,221 sqft Built 2014
Raw Value $741,595
Adjusted Value $748,464

Adjusted -$5,568 for 18 sqft less living space and +$12,437 for being newer. Net adjustment: +$6,869.

4 bed 3 bath 2,219 sqft Built 2007
Raw Value $904,649
Adjusted Value $999,196

Adjusted -$4,949 for 16 sqft less living space and +$99,496 for being newer. Net adjustment: +$94,547.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $663,224

Adjusted +$88,776 for 287 sqft more living space and +$12,437 for being newer. Net adjustment: +$101,213.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $655,125

Adjusted +$88,776 for 287 sqft more living space and -$12,437 for being older. Net adjustment: +$76,339.

The Neighborhood

This home is valued 9.4% below the R302609C - HIGHLAND HORIZON median of $781,434. That positions it competitively for buyers comparing within the neighborhood. The neighborhood appreciated 2.3% over the past year.

R302609C - HIGHLAND HORIZON

typical
399 Properties
$781,434 Median Value
+2.3% YoY Change
0% Have Pool
100% Have Garage
This Home
$707,647
Median
$781,434

This home is -9.4% below the subdivision median.

Tax Analysis

The estimated annual property tax is $14,182 across all districts. With a homestead exemption claimed, that drops to $12,801 — saving $1,381 per year. That's $1,067 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%$6,320
Brushy Creek MUDMUD0.3868%$2,737
Williamson CountyCounty0.3694%$2,614
Austin Community Collegespecial0.1034%$732
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$708
Brushy Creek MUD Defined AreaMUD0.0900%$637
Williamson County FM/RdCounty0.0443%$314
Upper Brushy Creek WCIDWater0.0170%$120
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0041%$14,182

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $663,224 would pay approximately $4,140 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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