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3901 SANSOME LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,528 sqftBuilt 2014

Property at a Glance

This home is estimated between $497,209 and $688,156, with a best estimate of $639,692. That places the property above the G799514C - MAYFIELD RANCH median of $523,371, in a neighborhood that declined 9.3% over the past year.

Estimated Value Range

$497,209 $688,156
Best Estimate
$639,692
WCAD Value
$546,870
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 $497,209 and $688,156. 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 $668,642

Adjusted +$85,123 for 384 sqft more living space and -$3,652 for being older. Net adjustment: +$81,471.

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 $688,156

Adjusted +$93,324 for 421 sqft more living space. Net adjustment: +$93,324.

3925 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,786 sqft Built 2015
Raw Value $698,710
Adjusted Value $639,692

Adjusted -$57,192 for 258 sqft less living space and -$1,826 for being older. Net adjustment: -$59,018.

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 $497,209

Adjusted -$46,995 for 212 sqft less living space and -$3,652 for being older. Net adjustment: -$50,647.

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 $508,103

Adjusted -$75,369 for 340 sqft less living space and -$1,826 for being older. Net adjustment: -$77,195.

The Neighborhood

This home is valued 4.5% 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
$546,870
Median
$523,371

This home is +4.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $11,300 across all districts. With a homestead exemption claimed, that drops to $9,728 — saving $1,572 per year. That's $811 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%$5,745
Highlands at Mayfield Ranch MUDMUD0.4850%$2,652
Williamson CountyCounty0.3694%$2,020
Williamson County ESD #9 - Round RockESD0.0999%$546
Williamson County FM/RdCounty0.0443%$242
Upper Brushy Creek WCIDWater0.0170%$93
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$11,300

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $639,692 would pay approximately $3,993 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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