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3923 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,243 sqftBuilt 1999

Property at a Glance

This home is estimated between $278,990 and $514,591, with a best estimate of $448,677. 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

$278,990 $514,591
Best Estimate
$448,677
WCAD Value
$511,771
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 $278,990 and $514,591. 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 $376,854

Adjusted -$124,742 for 436 sqft less living space and -$3,930 for being older. Net adjustment: -$128,672.

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 $448,677

Adjusted -$105,573 for 369 sqft less living space and -$1,965 for being older. Net adjustment: -$107,538.

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 $514,591

Adjusted +$12,303 for 43 sqft more living space and -$11,789 for being older. Net adjustment: +$514.

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 $476,465

Adjusted -$18,025 for 63 sqft less living space and -$1,965 for being older. Net adjustment: -$19,990.

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 $278,990

Adjusted -$218,299 for 763 sqft less living space and -$1,965 for being older. Net adjustment: -$220,264.

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
$511,771
Median
$514,276

This home is -0.5% below the subdivision median.

Tax Analysis

The estimated annual property tax is $9,208 across all districts. With a homestead exemption claimed, that drops to $7,863 — saving $1,345 per year. That's $655 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%$4,571
Round RockCity0.3720%$1,904
Williamson CountyCounty0.3694%$1,891
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%$9,208

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $448,677 would pay approximately $2,801 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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