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3806 SPANISH BAY CT, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed3 bath2,529 sqftBuilt 2002

Property at a Glance

This home is estimated between $499,458 and $735,610, with a best estimate of $693,297. That places the property above the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276, in a neighborhood that declined 8.7% over the past year.

Estimated Value Range

$499,458 $735,610
Best Estimate
$693,297
WCAD Value
$693,593
High Confidence

Based on 5 comparable properties(5 in the same subdivision)

Based on 5 comparable properties in R550600D - Forest Creek Sec 15,16,19,31, this home's estimated market value is between $499,458 and $735,610. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3802 SPANISH BAY CT, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,436 sqft Built 2002
Raw Value $472,850
Adjusted Value $499,458

Adjusted +$26,608 for 93 sqft more living space. Net adjustment: +$26,608.

3807 SPANISH BAY CT, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,103 sqft Built 2005
Raw Value $577,310
Adjusted Value $693,297

Adjusted +$121,881 for 426 sqft more living space and -$5,894 for being older. Net adjustment: +$115,987.

3804 SPANISH BAY CT, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,920 sqft Built 2003
Raw Value $542,532
Adjusted Value $714,806

Adjusted +$174,239 for 609 sqft more living space and -$1,965 for being older. Net adjustment: +$172,274.

3803 SPANISH BAY CT, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 3 bath 1,796 sqft Built 2005
Raw Value $531,788
Adjusted Value $735,610

Adjusted +$209,716 for 733 sqft more living space and -$5,894 for being older. Net adjustment: +$203,822.

3801 SPANISH BAY CT, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,339 sqft Built 2003
Raw Value $459,509
Adjusted Value $511,904

Adjusted +$54,360 for 190 sqft more living space and -$1,965 for being older. Net adjustment: +$52,395.

The Neighborhood

This home is valued 34.9% above the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276. With 274 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.7% over the past year.

R550600D - Forest Creek Sec 15,16,19,31

above average
274 Properties
$514,276 Median Value
-8.7% YoY Change
0% Have Pool
99% Have Garage
This Home
$693,593
Median
$514,276

This home is +34.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,480 across all districts. With a homestead exemption claimed, that drops to $11,101 — saving $1,379 per year. That's $925 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%$6,194
Round RockCity0.3720%$2,580
Williamson CountyCounty0.3694%$2,562
Austin Community Collegespecial0.1034%$717
Williamson County FM/RdCounty0.0443%$307
Upper Brushy Creek WCIDWater0.0170%$118
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$12,480

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $693,297 would pay approximately $4,328 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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