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3810 SPYGLASS CV, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath3,073 sqftBuilt 2005

Property at a Glance

This home is estimated between $516,937 and $732,109, with a best estimate of $705,047. 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

$516,937 $732,109
Best Estimate
$705,047
WCAD Value
$578,699
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 $516,937 and $732,109. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3800 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,180 sqft Built 2004
Raw Value $447,589
Adjusted Value $705,047

Adjusted +$255,493 for 893 sqft more living space and +$1,965 for being newer. Net adjustment: +$257,458.

3801 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 3,011 sqft Built 2004
Raw Value $497,233
Adjusted Value $516,937

Adjusted +$17,739 for 62 sqft more living space and +$1,965 for being newer. Net adjustment: +$19,704.

3803 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,527 sqft Built 2003
Raw Value $491,158
Adjusted Value $651,302

Adjusted +$156,214 for 546 sqft more living space and +$3,930 for being newer. Net adjustment: +$160,144.

3805 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,072 sqft Built 2003
Raw Value $441,787
Adjusted Value $732,109

Adjusted +$286,392 for 1,001 sqft more living space and +$3,930 for being newer. Net adjustment: +$290,322.

3807 PEBBLE CT, ROUND ROCK, TX 78664
0.06 mi 100% similar Same subdivision
3 bed 2 bath 2,114 sqft Built 2002
Raw Value $440,736
Adjusted Value $721,006

Adjusted +$274,376 for 959 sqft more living space and +$5,894 for being newer. Net adjustment: +$280,270.

The Neighborhood

This home is valued 12.5% 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
$578,699
Median
$514,276

This home is +12.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,412 across all districts. With a homestead exemption claimed, that drops to $9,055 — saving $1,357 per year. That's $755 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%$5,168
Round RockCity0.3720%$2,153
Williamson CountyCounty0.3694%$2,138
Austin Community Collegespecial0.1034%$598
Williamson County FM/RdCounty0.0443%$257
Upper Brushy Creek WCIDWater0.0170%$98
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,412

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $705,047 would pay approximately $4,401 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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