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3505 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,186 sqftBuilt 2008

Property at a Glance

This home is estimated between $755,171 and $1,115,174, with a best estimate of $799,736. 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

$755,171 $1,115,174
Best Estimate
$799,736
WCAD Value
$923,301
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 $755,171 and $1,115,174 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 $877,335

Adjusted -$13,419 for 33 sqft less living space and -$13,895 for being older. Net adjustment: -$27,314.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $776,468

Adjusted +$13,012 for 32 sqft more living space and -$97,266 for being older. Net adjustment: -$84,254.

5 bed 5 bath 2,711 sqft Built 2016
Raw Value $1,217,491
Adjusted Value $1,115,174

Adjusted -$213,478 for 525 sqft less living space and +$111,161 for being newer. Net adjustment: -$102,317.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $755,171

Adjusted +$109,789 for 270 sqft more living space and +$83,371 for being newer. Net adjustment: +$193,160.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $799,736

Adjusted +$109,789 for 270 sqft more living space and +$111,161 for being newer. Net adjustment: +$220,950.

The Neighborhood

This home is valued 1.1% 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
$923,301
Median
$933,667

This home is -1.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $17,171 across all districts. With a homestead exemption claimed, that drops to $15,751 — saving $1,420 per year. That's $1,313 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%$8,188
Williamson CountyCounty0.3694%$3,387
Walsh Ranch MUDMUD0.3455%$3,168
Austin Community Collegespecial0.1034%$948
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$917
Williamson County FM/RdCounty0.0443%$406
Upper Brushy Creek WCIDWater0.0170%$156
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$17,171

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $799,736 would pay approximately $4,992 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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