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3807 SPANISH BAY CT, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

5 bed4 bath2,103 sqftBuilt 2005

Property at a Glance

This home is estimated between $383,471 and $619,623, with a best estimate of $577,606. 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

$383,471 $619,623
Best Estimate
$577,606
WCAD Value
$577,310
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 $383,471 and $619,623. 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 $383,471

Adjusted -$95,273 for 333 sqft less living space and +$5,894 for being newer. Net adjustment: -$89,379.

3806 SPANISH BAY CT, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,529 sqft Built 2002
Raw Value $693,593
Adjusted Value $577,606

Adjusted -$121,881 for 426 sqft less living space and +$5,894 for being newer. 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 $598,819

Adjusted +$52,357 for 183 sqft more living space and +$3,930 for being newer. Net adjustment: +$56,287.

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 $619,623

Adjusted +$87,835 for 307 sqft more living space. Net adjustment: +$87,835.

3805 SPYGLASS CV, ROUND ROCK, TX 78664
0.06 mi 100% similar Same subdivision
3 bed 2 bath 2,072 sqft Built 2003
Raw Value $441,787
Adjusted Value $454,586

Adjusted +$8,869 for 31 sqft more living space and +$3,930 for being newer. Net adjustment: +$12,799.

The Neighborhood

This home is valued 12.3% 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

typical
274 Properties
$514,276 Median Value
-8.7% YoY Change
0% Have Pool
99% Have Garage
This Home
$577,310
Median
$514,276

This home is +12.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,387 across all districts. With a homestead exemption claimed, that drops to $9,030 — saving $1,357 per year. That's $753 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%$5,156
Round RockCity0.3720%$2,148
Williamson CountyCounty0.3694%$2,133
Austin Community Collegespecial0.1034%$597
Williamson County FM/RdCounty0.0443%$256
Upper Brushy Creek WCIDWater0.0170%$98
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,387

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $577,606 would pay approximately $3,605 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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