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3929 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed3 bath2,024 sqftBuilt 2000

Property at a Glance

This home is estimated between $308,126 and $674,091, with a best estimate of $542,416. 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

$308,126 $674,091
Best Estimate
$542,416
WCAD Value
$603,425
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 $308,126 and $674,091. 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 $602,268

Adjusted +$98,707 for 345 sqft more living space and -$1,965 for being older. Net adjustment: +$96,742.

4008 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 3 bath 2,036 sqft Built 2000
Raw Value $545,849
Adjusted Value $542,416

Adjusted -$3,433 for 12 sqft less living space. Net adjustment: -$3,433.

3958 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,775 sqft Built 2000
Raw Value $522,992
Adjusted Value $308,126

Adjusted -$214,866 for 751 sqft less living space. Net adjustment: -$214,866.

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 $674,091

Adjusted +$117,876 for 412 sqft more living space. Net adjustment: +$117,876.

3995 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,374 sqft Built 2002
Raw Value $458,723
Adjusted Value $354,656

Adjusted -$100,137 for 350 sqft less living space and -$3,930 for being older. Net adjustment: -$104,067.

The Neighborhood

This home is valued 17.3% 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

above average
274 Properties
$514,276 Median Value
-8.7% YoY Change
0% Have Pool
99% Have Garage
This Home
$603,425
Median
$514,276

This home is +17.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,857 across all districts. With a homestead exemption claimed, that drops to $9,495 — saving $1,362 per year. That's $791 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%$5,389
Round RockCity0.3720%$2,245
Williamson CountyCounty0.3694%$2,229
Austin Community Collegespecial0.1034%$624
Williamson County FM/RdCounty0.0443%$267
Upper Brushy Creek WCIDWater0.0170%$103
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,857

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $542,416 would pay approximately $3,386 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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