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4008 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

5 bed3 bath2,036 sqftBuilt 2000

Property at a Glance

This home is estimated between $507,837 and $705,313, with a best estimate of $605,701. 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

$507,837 $705,313
Best Estimate
$605,701
WCAD Value
$545,849
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 $507,837 and $705,313. 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 $605,701

Adjusted +$102,140 for 357 sqft more living space and -$1,965 for being older. Net adjustment: +$100,175.

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 $677,524

Adjusted +$121,309 for 424 sqft more living space. Net adjustment: +$121,309.

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 $705,313

Adjusted +$208,858 for 730 sqft more living space. Net adjustment: +$208,858.

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 $507,837

Adjusted +$8,583 for 30 sqft more living space. Net adjustment: +$8,583.

3955 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
6 bed 3 bath 1,816 sqft Built 2000
Raw Value $508,354
Adjusted Value $571,297

Adjusted +$62,943 for 220 sqft more living space. Net adjustment: +$62,943.

The Neighborhood

This home is valued 6.1% 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
$545,849
Median
$514,276

This home is +6.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $9,821 across all districts. With a homestead exemption claimed, that drops to $8,470 — saving $1,351 per year. That's $706 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%$4,875
Round RockCity0.3720%$2,031
Williamson CountyCounty0.3694%$2,017
Austin Community Collegespecial0.1034%$564
Williamson County FM/RdCounty0.0443%$242
Upper Brushy Creek WCIDWater0.0170%$93
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$9,821

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $605,701 would pay approximately $3,781 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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