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

3506 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,177 sqftBuilt 2009

Property at a Glance

This home is estimated between $737,616 and $1,097,619, with a best estimate of $782,181. 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

$737,616 $1,097,619
Best Estimate
$782,181
WCAD Value
$930,182
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 $737,616 and $1,097,619 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 $859,781

Adjusted -$17,078 for 42 sqft less living space and -$27,790 for being older. Net adjustment: -$44,868.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $758,913

Adjusted +$9,352 for 23 sqft more living space and -$111,161 for being older. Net adjustment: -$101,809.

5 bed 5 bath 2,711 sqft Built 2016
Raw Value $1,217,491
Adjusted Value $1,097,619

Adjusted -$217,138 for 534 sqft less living space and +$97,266 for being newer. Net adjustment: -$119,872.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $737,616

Adjusted +$106,129 for 261 sqft more living space and +$69,476 for being newer. Net adjustment: +$175,605.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $782,181

Adjusted +$106,129 for 261 sqft more living space and +$97,266 for being newer. Net adjustment: +$203,395.

The Neighborhood

This home is in line with the R147606C - WALSH RANCH median of $933,667. 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
$930,182
Median
$933,667

This home is -0.4% below the subdivision median.

Tax Analysis

The estimated annual property tax is $17,420 across all districts. With a homestead exemption claimed, that drops to $15,998 — saving $1,422 per year. That's $1,333 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%$8,307
Williamson CountyCounty0.3694%$3,437
Walsh Ranch MUDMUD0.3455%$3,214
Austin Community Collegespecial0.1034%$962
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$930
Williamson County FM/RdCounty0.0443%$412
Upper Brushy Creek WCIDWater0.0170%$158
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$17,420

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $782,181 would pay approximately $4,882 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