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3977 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,338 sqftBuilt 2001

Property at a Glance

This home is estimated between $310,100 and $545,701, with a best estimate of $479,787. 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

$310,100 $545,701
Best Estimate
$479,787
WCAD Value
$524,223
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 $310,100 and $545,701. 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 $407,964

Adjusted -$97,562 for 341 sqft less living space. Net adjustment: -$97,562.

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 $479,787

Adjusted -$78,393 for 274 sqft less living space and +$1,965 for being newer. Net adjustment: -$76,428.

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 $545,701

Adjusted +$39,483 for 138 sqft more living space and -$7,859 for being older. Net adjustment: +$31,624.

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 $507,575

Adjusted +$9,155 for 32 sqft more living space and +$1,965 for being newer. Net adjustment: +$11,120.

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 $310,100

Adjusted -$191,119 for 668 sqft less living space and +$1,965 for being newer. Net adjustment: -$189,154.

The Neighborhood

This home is valued 1.9% 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
$524,223
Median
$514,276

This home is +1.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $9,432 across all districts. With a homestead exemption claimed, that drops to $8,085 — saving $1,347 per year. That's $674 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%$4,682
Round RockCity0.3720%$1,950
Williamson CountyCounty0.3694%$1,937
Austin Community Collegespecial0.1034%$542
Williamson County FM/RdCounty0.0443%$232
Upper Brushy Creek WCIDWater0.0170%$89
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$9,432

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $479,787 would pay approximately $2,995 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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