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3938 SANSOME LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,891 sqftBuilt 2015

Property at a Glance

This home is estimated between $357,829 and $548,777, with a best estimate of $387,681. That places the property below the G799514C - MAYFIELD RANCH median of $523,371, in a neighborhood that declined 9.3% over the past year.

Estimated Value Range

$357,829 $548,777
Best Estimate
$387,681
WCAD Value
$585,670
High Confidence

Based on 5 comparable properties(5 in the same subdivision)

Based on 5 comparable properties in G799514C - MAYFIELD RANCH, this home's estimated market value is between $357,829 and $548,777. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3909 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,144 sqft Built 2016
Raw Value $587,171
Adjusted Value $529,262

Adjusted -$56,083 for 253 sqft less living space and -$1,826 for being older. Net adjustment: -$57,909.

3905 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,107 sqft Built 2014
Raw Value $594,832
Adjusted Value $548,777

Adjusted -$47,881 for 216 sqft less living space and +$1,826 for being newer. Net adjustment: -$46,055.

3942 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,740 sqft Built 2016
Raw Value $547,856
Adjusted Value $357,829

Adjusted -$188,201 for 849 sqft less living space and -$1,826 for being older. Net adjustment: -$190,027.

3913 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,868 sqft Built 2015
Raw Value $585,298
Adjusted Value $368,723

Adjusted -$216,575 for 977 sqft less living space. Net adjustment: -$216,575.

3930 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,962 sqft Built 2015
Raw Value $625,093
Adjusted Value $387,681

Adjusted -$237,412 for 1,071 sqft less living space. Net adjustment: -$237,412.

The Neighborhood

This home is valued 11.9% above the G799514C - MAYFIELD RANCH median of $523,371. With 1,093 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 9.3% over the past year.

G799514C - MAYFIELD RANCH

typical
1,093 Properties
$523,371 Median Value
-9.3% YoY Change
1% Have Pool
100% Have Garage
This Home
$585,670
Median
$523,371

This home is +11.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,102 across all districts. With a homestead exemption claimed, that drops to $10,523 — saving $1,579 per year. That's $877 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
Georgetown ISDSchool1.0506%$6,153
Highlands at Mayfield Ranch MUDMUD0.4850%$2,840
Williamson CountyCounty0.3694%$2,164
Williamson County ESD #9 - Round RockESD0.0999%$585
Williamson County FM/RdCounty0.0443%$260
Upper Brushy Creek WCIDWater0.0170%$100
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$12,102

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $387,681 would pay approximately $2,420 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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