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3905 SANSOME LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,107 sqftBuilt 2014

Property at a Glance

This home is estimated between $453,546 and $668,234, with a best estimate of $575,317. 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

$453,546 $668,234
Best Estimate
$575,317
WCAD Value
$594,832
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 $453,546 and $668,234. 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 $575,317

Adjusted -$8,202 for 37 sqft less living space and -$3,652 for being older. Net adjustment: -$11,854.

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 $631,725

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

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 $546,368

Adjusted -$150,516 for 679 sqft less living space and -$1,826 for being older. Net adjustment: -$152,342.

3901 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,528 sqft Built 2014
Raw Value $546,870
Adjusted Value $453,546

Adjusted -$93,324 for 421 sqft less living space. Net adjustment: -$93,324.

3917 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,905 sqft Built 2015
Raw Value $625,282
Adjusted Value $668,234

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

The Neighborhood

This home is valued 13.7% 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
$594,832
Median
$523,371

This home is +13.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,291 across all districts. With a homestead exemption claimed, that drops to $10,710 — saving $1,581 per year. That's $893 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%$6,249
Highlands at Mayfield Ranch MUDMUD0.4850%$2,885
Williamson CountyCounty0.3694%$2,198
Williamson County ESD #9 - Round RockESD0.0999%$594
Williamson County FM/RdCounty0.0443%$264
Upper Brushy Creek WCIDWater0.0170%$101
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$12,291

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $575,317 would pay approximately $3,591 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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