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3942 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,332 sqftBuilt 2001

Property at a Glance

This home is estimated between $308,383 and $543,984, with a best estimate of $478,070. 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

$308,383 $543,984
Best Estimate
$478,070
WCAD Value
$528,258
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 $308,383 and $543,984. 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 $406,247

Adjusted -$99,279 for 347 sqft less living space. Net adjustment: -$99,279.

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 $478,070

Adjusted -$80,110 for 280 sqft less living space and +$1,965 for being newer. Net adjustment: -$78,145.

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 $543,984

Adjusted +$37,766 for 132 sqft more living space and -$7,859 for being older. Net adjustment: +$29,907.

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 $505,859

Adjusted +$7,439 for 26 sqft more living space and +$1,965 for being newer. Net adjustment: +$9,404.

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 $308,383

Adjusted -$192,836 for 674 sqft less living space and +$1,965 for being newer. Net adjustment: -$190,871.

The Neighborhood

This home is valued 2.7% 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
$528,258
Median
$514,276

This home is +2.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $9,505 across all districts. With a homestead exemption claimed, that drops to $8,157 — saving $1,348 per year. That's $680 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%$4,718
Round RockCity0.3720%$1,965
Williamson CountyCounty0.3694%$1,952
Austin Community Collegespecial0.1034%$546
Williamson County FM/RdCounty0.0443%$234
Upper Brushy Creek WCIDWater0.0170%$90
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$9,505

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $478,070 would pay approximately $2,984 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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