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3907 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,477 sqftBuilt 1999

Property at a Glance

This home is estimated between $345,939 and $581,539, with a best estimate of $515,626. 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

$345,939 $581,539
Best Estimate
$515,626
WCAD Value
$532,214
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 $345,939 and $581,539. 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 $443,803

Adjusted -$57,793 for 202 sqft less living space and -$3,930 for being older. Net adjustment: -$61,723.

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 $515,626

Adjusted -$38,624 for 135 sqft less living space and -$1,965 for being older. Net adjustment: -$40,589.

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 $581,539

Adjusted +$79,251 for 277 sqft more living space and -$11,789 for being older. Net adjustment: +$67,462.

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 $543,414

Adjusted +$48,924 for 171 sqft more living space and -$1,965 for being older. Net adjustment: +$46,959.

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 $345,939

Adjusted -$151,350 for 529 sqft less living space and -$1,965 for being older. Net adjustment: -$153,315.

The Neighborhood

This home is valued 3.5% 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
$532,214
Median
$514,276

This home is +3.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $9,576 across all districts. With a homestead exemption claimed, that drops to $8,227 — saving $1,349 per year. That's $686 per month a buyer should budget. The assessed value increased -2.2% vs the subdivision average of -8.7%. This above-average increase gives a protest opportunity score of 33 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$4,753
Round RockCity0.3720%$1,980
Williamson CountyCounty0.3694%$1,966
Austin Community Collegespecial0.1034%$550
Williamson County FM/RdCounty0.0443%$236
Upper Brushy Creek WCIDWater0.0170%$90
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$9,576
33 / 100

Some opportunity.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $515,626 would pay approximately $3,219 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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