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3911 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,331 sqftBuilt 2000

Property at a Glance

This home is estimated between $306,132 and $541,733, with a best estimate of $475,819. 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

$306,132 $541,733
Best Estimate
$475,819
WCAD Value
$511,160
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 $306,132 and $541,733. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3951 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,679 sqft Built 2001
Raw Value $505,526
Adjusted Value $403,996

Adjusted -$99,565 for 348 sqft less living space and -$1,965 for being older. Net adjustment: -$101,530.

3944 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,612 sqft Built 2000
Raw Value $556,215
Adjusted Value $475,819

Adjusted -$80,396 for 281 sqft less living space. Net adjustment: -$80,396.

3940 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,200 sqft Built 2005
Raw Value $514,077
Adjusted Value $541,733

Adjusted +$37,480 for 131 sqft more living space and -$9,824 for being older. Net adjustment: +$27,656.

4006 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 3 bath 1,306 sqft Built 2000
Raw Value $496,455
Adjusted Value $503,608

Adjusted +$7,153 for 25 sqft more living space. Net adjustment: +$7,153.

3905 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,006 sqft Built 2000
Raw Value $499,254
Adjusted Value $306,132

Adjusted -$193,122 for 675 sqft less living space. Net adjustment: -$193,122.

The Neighborhood

This home is in line with the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276. 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
$511,160
Median
$514,276

This home is -0.6% below the subdivision median.

Tax Analysis

The estimated annual property tax is $9,197 across all districts. With a homestead exemption claimed, that drops to $7,852 — saving $1,345 per year. That's $654 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%$4,565
Round RockCity0.3720%$1,902
Williamson CountyCounty0.3694%$1,888
Austin Community Collegespecial0.1034%$529
Williamson County FM/RdCounty0.0443%$227
Upper Brushy Creek WCIDWater0.0170%$87
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$9,197

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $475,819 would pay approximately $2,970 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 4/19/2026.

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