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3917 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed3 bath1,371 sqftBuilt 2000

Property at a Glance

This home is estimated between $355,588 and $553,177, with a best estimate of $487,263. 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

$355,588 $553,177
Best Estimate
$487,263
WCAD Value
$586,608
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 $355,588 and $553,177. 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 $415,440

Adjusted -$88,121 for 308 sqft less living space and -$1,965 for being older. Net adjustment: -$90,086.

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 $355,588

Adjusted -$190,261 for 665 sqft less living space. Net adjustment: -$190,261.

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 $487,263

Adjusted -$68,952 for 241 sqft less living space. Net adjustment: -$68,952.

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 $553,177

Adjusted +$48,924 for 171 sqft more living space and -$9,824 for being older. Net adjustment: +$39,100.

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 $515,052

Adjusted +$18,597 for 65 sqft more living space. Net adjustment: +$18,597.

The Neighborhood

This home is valued 14.1% 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
$586,608
Median
$514,276

This home is +14.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,555 across all districts. With a homestead exemption claimed, that drops to $9,196 — saving $1,359 per year. That's $766 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%$5,239
Round RockCity0.3720%$2,182
Williamson CountyCounty0.3694%$2,167
Austin Community Collegespecial0.1034%$607
Williamson County FM/RdCounty0.0443%$260
Upper Brushy Creek WCIDWater0.0170%$100
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,555

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $487,263 would pay approximately $3,041 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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