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3917 SANSOME LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,905 sqftBuilt 2015

Property at a Glance

This home is estimated between $360,933 and $588,773, with a best estimate of $532,365. 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

$360,933 $588,773
Best Estimate
$532,365
WCAD Value
$625,282
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 $360,933 and $588,773. 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 $532,365

Adjusted -$52,980 for 239 sqft less living space and -$1,826 for being older. Net adjustment: -$54,806.

3938 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,891 sqft Built 2015
Raw Value $585,670
Adjusted Value $588,773

Adjusted +$3,103 for 14 sqft more living space. Net adjustment: +$3,103.

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 $551,880

Adjusted -$44,778 for 202 sqft less living space and +$1,826 for being newer. Net adjustment: -$42,952.

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 $360,933

Adjusted -$185,097 for 835 sqft less living space and -$1,826 for being older. Net adjustment: -$186,923.

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 $371,827

Adjusted -$213,471 for 963 sqft less living space. Net adjustment: -$213,471.

The Neighborhood

This home is valued 19.5% 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

above average
1,093 Properties
$523,371 Median Value
-9.3% YoY Change
1% Have Pool
100% Have Garage
This Home
$625,282
Median
$523,371

This home is +19.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,920 across all districts. With a homestead exemption claimed, that drops to $11,334 — saving $1,586 per year. That's $945 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%$6,569
Highlands at Mayfield Ranch MUDMUD0.4850%$3,033
Williamson CountyCounty0.3694%$2,310
Williamson County ESD #9 - Round RockESD0.0999%$625
Williamson County FM/RdCounty0.0443%$277
Upper Brushy Creek WCIDWater0.0170%$106
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$12,920

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $532,365 would pay approximately $3,323 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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