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3405 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,988 sqftBuilt 2007

Property at a Glance

This home is estimated between $414,837 and $1,455,182, with a best estimate of $1,116,477. 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

$414,837 $1,455,182
Best Estimate
$1,116,477
WCAD Value
$860,045
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 $414,837 and $1,455,182 should be treated as a rough guide.

Comparable Properties (5)

3323 MARCASITE DR, ROUND ROCK, TX 78681
0.00 mi 99% similar Same subdivision
4 bed 3 bath 2,219 sqft Built 2007
Raw Value $904,649
Adjusted Value $1,217,344

Adjusted +$312,695 for 769 sqft more living space. Net adjustment: +$312,695.

5 bed 5 bath 2,711 sqft Built 2016
Raw Value $1,217,491
Adjusted Value $1,455,182

Adjusted +$112,635 for 277 sqft more living space and +$125,056 for being newer. Net adjustment: +$237,691.

4 bed 2 bath 3,110 sqft Built 2000
Raw Value $572,254
Adjusted Value $425,380

Adjusted -$49,608 for 122 sqft less living space and -$97,266 for being older. Net adjustment: -$146,874.

3 bed 2 bath 3,097 sqft Built 2000
Raw Value $556,425
Adjusted Value $414,837

Adjusted -$44,322 for 109 sqft less living space and -$97,266 for being older. Net adjustment: -$141,588.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $1,116,477

Adjusted +$339,126 for 834 sqft more living space and -$83,371 for being older. Net adjustment: +$255,755.

The Neighborhood

This home is valued 7.9% below the R147606C - WALSH RANCH median of $933,667. That positions it competitively for buyers comparing within the neighborhood. 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
$860,045
Median
$933,667

This home is -7.9% below the subdivision median.

Tax Analysis

The estimated annual property tax is $16,107 across all districts. With a homestead exemption claimed, that drops to $14,698 — saving $1,409 per year. That's $1,225 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%$7,681
Williamson CountyCounty0.3694%$3,177
Walsh Ranch MUDMUD0.3455%$2,971
Austin Community Collegespecial0.1034%$889
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$860
Williamson County FM/RdCounty0.0443%$381
Upper Brushy Creek WCIDWater0.0170%$146
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$16,107

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $1,116,477 would pay approximately $6,969 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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