Beta Williamson County, TX only — data and coverage are limited during early access.

3964 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,416 sqftBuilt 2001

Property at a Glance

This home is estimated between $332,416 and $568,017, with a best estimate of $502,103. 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

$332,416 $568,017
Best Estimate
$502,103
WCAD Value
$493,885
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 $332,416 and $568,017. 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 $430,280

Adjusted -$75,246 for 263 sqft less living space. Net adjustment: -$75,246.

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 $502,103

Adjusted -$56,077 for 196 sqft less living space and +$1,965 for being newer. Net adjustment: -$54,112.

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 $568,017

Adjusted +$61,799 for 216 sqft more living space and -$7,859 for being older. Net adjustment: +$53,940.

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 $529,892

Adjusted +$31,472 for 110 sqft more living space and +$1,965 for being newer. Net adjustment: +$33,437.

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 $332,416

Adjusted -$168,803 for 590 sqft less living space and +$1,965 for being newer. Net adjustment: -$166,838.

The Neighborhood

This home is valued 4.0% below the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276. That positions it competitively for buyers comparing within the neighborhood. 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
$493,885
Median
$514,276

This home is -4.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,886 across all districts. With a homestead exemption claimed, that drops to $7,545 — saving $1,341 per year. That's $629 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%$4,411
Round RockCity0.3720%$1,837
Williamson CountyCounty0.3694%$1,825
Austin Community Collegespecial0.1034%$511
Williamson County FM/RdCounty0.0443%$219
Upper Brushy Creek WCIDWater0.0170%$84
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,886

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $502,103 would pay approximately $3,134 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.

View full property details