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3620 AQUAMARINE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,147 sqftBuilt 2007

Property at a Glance

This home is estimated between $753,208 and $935,907, with a best estimate of $797,773. 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

$753,208 $935,907
Best Estimate
$797,773
WCAD Value
$859,214
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 $753,208 and $935,907 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 $875,372

Adjusted -$29,277 for 72 sqft less living space. Net adjustment: -$29,277.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $774,505

Adjusted -$2,846 for 7 sqft less living space and -$83,371 for being older. Net adjustment: -$86,217.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $753,208

Adjusted +$93,931 for 231 sqft more living space and +$97,266 for being newer. Net adjustment: +$191,197.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $797,773

Adjusted +$93,931 for 231 sqft more living space and +$125,056 for being newer. Net adjustment: +$218,987.

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $935,907

Adjusted +$136,626 for 336 sqft more living space and +$97,266 for being newer. Net adjustment: +$233,892.

The Neighborhood

This home is valued 8.0% 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
$859,214
Median
$933,667

This home is -8.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $15,868 across all districts. With a homestead exemption claimed, that drops to $14,461 — saving $1,407 per year. That's $1,205 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%$7,567
Williamson CountyCounty0.3694%$3,130
Walsh Ranch MUDMUD0.3455%$2,927
Austin Community Collegespecial0.1034%$876
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$847
Williamson County FM/RdCounty0.0443%$376
Upper Brushy Creek WCIDWater0.0170%$144
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$15,868

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $797,773 would pay approximately $4,980 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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