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3633 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,446 sqftBuilt 2007

Property at a Glance

This home is estimated between $874,789 and $1,057,488, with a best estimate of $919,354. 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

$874,789 $1,057,488
Best Estimate
$919,354
WCAD Value
$1,002,903
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 $874,789 and $1,057,488 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 $996,953

Adjusted +$92,304 for 227 sqft more living space. Net adjustment: +$92,304.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $896,086

Adjusted +$118,735 for 292 sqft more living space and -$83,371 for being older. Net adjustment: +$35,364.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $874,789

Adjusted +$215,512 for 530 sqft more living space and +$97,266 for being newer. Net adjustment: +$312,778.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $919,354

Adjusted +$215,512 for 530 sqft more living space and +$125,056 for being newer. Net adjustment: +$340,568.

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $1,057,488

Adjusted +$258,207 for 635 sqft more living space and +$97,266 for being newer. Net adjustment: +$355,473.

The Neighborhood

This home is valued 7.4% 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
$1,002,903
Median
$933,667

This home is +7.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $17,986 across all districts. With a homestead exemption claimed, that drops to $16,559 — saving $1,427 per year. That's $1,380 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%$8,577
Williamson CountyCounty0.3694%$3,548
Walsh Ranch MUDMUD0.3455%$3,318
Austin Community Collegespecial0.1034%$993
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$960
Williamson County FM/RdCounty0.0443%$426
Upper Brushy Creek WCIDWater0.0170%$163
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$17,986

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $919,354 would pay approximately $5,739 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 4/19/2026.

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