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3641 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,673 sqftBuilt 2007

Property at a Glance

This home is estimated between $297,293 and $1,327,095, with a best estimate of $988,390. That places the property above the R147606C - WALSH RANCH median of $933,667, in a neighborhood that declined 4.6% over the past year.

Estimated Value Range

$297,293 $1,327,095
Best Estimate
$988,390
WCAD Value
$1,068,845
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 $297,293 and $1,327,095 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 $1,089,257

Adjusted +$184,608 for 454 sqft more living space. Net adjustment: +$184,608.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $988,390

Adjusted +$211,039 for 519 sqft more living space and -$83,371 for being older. Net adjustment: +$127,668.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $967,093

Adjusted +$307,816 for 757 sqft more living space and +$97,266 for being newer. Net adjustment: +$405,082.

4 bed 2 bath 3,110 sqft Built 2000
Raw Value $572,254
Adjusted Value $297,293

Adjusted -$177,695 for 437 sqft less living space and -$97,266 for being older. Net adjustment: -$274,961.

5 bed 5 bath 2,711 sqft Built 2016
Raw Value $1,217,491
Adjusted Value $1,327,095

Adjusted -$15,452 for 38 sqft less living space and +$125,056 for being newer. Net adjustment: +$109,604.

The Neighborhood

This home is valued 14.5% 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
$1,068,845
Median
$933,667

This home is +14.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $18,913 across all districts. With a homestead exemption claimed, that drops to $17,476 — saving $1,437 per year. That's $1,456 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%$9,019
Williamson CountyCounty0.3694%$3,731
Walsh Ranch MUDMUD0.3455%$3,489
Austin Community Collegespecial0.1034%$1,044
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$1,010
Williamson County FM/RdCounty0.0443%$448
Upper Brushy Creek WCIDWater0.0170%$172
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$18,913

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $988,390 would pay approximately $6,170 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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