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3510 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,141 sqftBuilt 2009

Property at a Glance

This home is estimated between $722,978 and $905,677, with a best estimate of $767,543. That places the property below the R147606C - WALSH RANCH median of $933,667, in a neighborhood that declined 4.6% over the past year.

Estimated Value Range

$722,978 $905,677
Best Estimate
$767,543
WCAD Value
$1,038,887
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in R147606C - WALSH RANCH. The estimated range of $722,978 and $905,677 should be treated as a rough guide.

Comparable Properties (5)

3323 MARCASITE DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,219 sqft Built 2007
Raw Value $904,649
Adjusted Value $845,142

Adjusted -$31,717 for 78 sqft less living space and -$27,790 for being older. Net adjustment: -$59,507.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $744,275

Adjusted -$5,286 for 13 sqft less living space and -$111,161 for being older. Net adjustment: -$116,447.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $722,978

Adjusted +$91,491 for 225 sqft more living space and +$69,476 for being newer. Net adjustment: +$160,967.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $767,543

Adjusted +$91,491 for 225 sqft more living space and +$97,266 for being newer. Net adjustment: +$188,757.

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $905,677

Adjusted +$134,186 for 330 sqft more living space and +$69,476 for being newer. Net adjustment: +$203,662.

The Neighborhood

This home is valued 11.3% above the R147606C - WALSH RANCH median of $933,667. With 239 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.6% over the past year.

R147606C - WALSH RANCH

typical
239 Properties
$933,667 Median Value
-4.6% YoY Change
0% Have Pool
100% Have Garage
This Home
$1,038,887
Median
$933,667

This home is +11.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $19,456 across all districts. With a homestead exemption claimed, that drops to $18,014 — saving $1,442 per year. That's $1,501 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%$9,278
Williamson CountyCounty0.3694%$3,838
Walsh Ranch MUDMUD0.3455%$3,589
Austin Community Collegespecial0.1034%$1,074
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$1,039
Williamson County FM/RdCounty0.0443%$461
Upper Brushy Creek WCIDWater0.0170%$177
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$19,456

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $767,543 would pay approximately $4,791 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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