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3637 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,463 sqftBuilt 2007

Property at a Glance

This home is estimated between $881,701 and $1,241,704, with a best estimate of $926,266. 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

$881,701 $1,241,704
Best Estimate
$926,266
WCAD Value
$1,008,795
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 $881,701 and $1,241,704 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 $1,003,866

Adjusted +$99,217 for 244 sqft more living space. Net adjustment: +$99,217.

5 bed 5 bath 2,711 sqft Built 2016
Raw Value $1,217,491
Adjusted Value $1,241,704

Adjusted -$100,843 for 248 sqft less living space and +$125,056 for being newer. Net adjustment: +$24,213.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $902,998

Adjusted +$125,647 for 309 sqft more living space and -$83,371 for being older. Net adjustment: +$42,276.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $881,701

Adjusted +$222,424 for 547 sqft more living space and +$97,266 for being newer. Net adjustment: +$319,690.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $926,266

Adjusted +$222,424 for 547 sqft more living space and +$125,056 for being newer. Net adjustment: +$347,480.

The Neighborhood

This home is valued 8.0% 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
$1,008,795
Median
$933,667

This home is +8.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $18,094 across all districts. With a homestead exemption claimed, that drops to $16,665 — saving $1,429 per year. That's $1,389 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%$8,629
Williamson CountyCounty0.3694%$3,569
Walsh Ranch MUDMUD0.3455%$3,338
Austin Community Collegespecial0.1034%$999
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$966
Williamson County FM/RdCounty0.0443%$428
Upper Brushy Creek WCIDWater0.0170%$164
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$18,094

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $926,266 would pay approximately $5,782 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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