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3800 SPANISH BAY CT, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,767 sqftBuilt 2003

Property at a Glance

This home is estimated between $295,856 and $544,041, with a best estimate of $498,758. That places the property below 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

$295,856 $544,041
Best Estimate
$498,758
WCAD Value
$580,758
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 $295,856 and $544,041. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

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 $498,758

Adjusted -$43,774 for 153 sqft less living space. Net adjustment: -$43,774.

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 $519,561

Adjusted -$8,297 for 29 sqft less living space and -$3,930 for being older. Net adjustment: -$12,227.

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 $295,856

Adjusted -$163,653 for 572 sqft less living space. Net adjustment: -$163,653.

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 $354,525

Adjusted -$87,262 for 305 sqft less living space. Net adjustment: -$87,262.

3806 SPYGLASS CV, ROUND ROCK, TX 78664
0.06 mi 100% similar Same subdivision
4 bed 3 bath 1,622 sqft Built 2005
Raw Value $506,486
Adjusted Value $544,041

Adjusted +$41,485 for 145 sqft more living space and -$3,930 for being older. Net adjustment: +$37,555.

The Neighborhood

This home is valued 12.9% 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

typical
274 Properties
$514,276 Median Value
-8.7% YoY Change
0% Have Pool
99% Have Garage
This Home
$580,758
Median
$514,276

This home is +12.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,449 across all districts. With a homestead exemption claimed, that drops to $9,092 — saving $1,357 per year. That's $758 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%$5,187
Round RockCity0.3720%$2,160
Williamson CountyCounty0.3694%$2,146
Austin Community Collegespecial0.1034%$601
Williamson County FM/RdCounty0.0443%$257
Upper Brushy Creek WCIDWater0.0170%$99
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,449

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $498,758 would pay approximately $3,113 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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