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

3425 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,444 sqftBuilt 2009

Property at a Glance

This home is estimated between $846,185 and $1,028,885, with a best estimate of $890,750. 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

$846,185 $1,028,885
Best Estimate
$890,750
WCAD Value
$1,076,579
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 $846,185 and $1,028,885 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 $968,350

Adjusted +$91,491 for 225 sqft more living space and -$27,790 for being older. Net adjustment: +$63,701.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $867,482

Adjusted +$117,921 for 290 sqft more living space and -$111,161 for being older. Net adjustment: +$6,760.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $846,185

Adjusted +$214,698 for 528 sqft more living space and +$69,476 for being newer. Net adjustment: +$284,174.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $890,750

Adjusted +$214,698 for 528 sqft more living space and +$97,266 for being newer. Net adjustment: +$311,964.

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $1,028,885

Adjusted +$257,394 for 633 sqft more living space and +$69,476 for being newer. Net adjustment: +$326,870.

The Neighborhood

This home is valued 15.3% 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

above average
239 Properties
$933,667 Median Value
-4.6% YoY Change
0% Have Pool
100% Have Garage
This Home
$1,076,579
Median
$933,667

This home is +15.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $19,110 across all districts. With a homestead exemption claimed, that drops to $17,671 — saving $1,439 per year. That's $1,473 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%$9,113
Williamson CountyCounty0.3694%$3,770
Walsh Ranch MUDMUD0.3455%$3,526
Austin Community Collegespecial0.1034%$1,055
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$1,020
Williamson County FM/RdCounty0.0443%$452
Upper Brushy Creek WCIDWater0.0170%$173
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$19,110

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $890,750 would pay approximately $5,560 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