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3929 SANSOME LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

2 bed2 bath2,141 sqftBuilt 2016

Property at a Glance

This home is estimated between $415,973 and $588,714, with a best estimate of $440,040. 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

$415,973 $588,714
Best Estimate
$440,040
WCAD Value
$464,616
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 $415,973 and $588,714. 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 $586,506

Adjusted -$665 for 3 sqft less living space. Net adjustment: -$665.

3933 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,446 sqft Built 2015
Raw Value $481,757
Adjusted Value $415,973

Adjusted -$67,610 for 305 sqft less living space and +$1,826 for being newer. Net adjustment: -$65,784.

3941 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,399 sqft Built 2016
Raw Value $487,483
Adjusted Value $430,291

Adjusted -$57,192 for 258 sqft less living space. Net adjustment: -$57,192.

3921 SANSOME LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,595 sqft Built 2015
Raw Value $538,854
Adjusted Value $440,040

Adjusted -$100,640 for 454 sqft less living space and +$1,826 for being newer. Net adjustment: -$98,814.

750 WHITETAIL DR, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,165 sqft Built 2020
Raw Value $601,338
Adjusted Value $588,714

Adjusted -$5,320 for 24 sqft less living space and -$7,304 for being older. Net adjustment: -$12,624.

The Neighborhood

This home is valued 11.2% below the G799514C - MAYFIELD RANCH median of $523,371. That positions it competitively for buyers comparing within the neighborhood. 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
$464,616
Median
$523,371

This home is -11.2% below the subdivision median.

Tax Analysis

The estimated annual property tax is $9,600 across all districts. With a homestead exemption claimed, that drops to $8,044 — saving $1,556 per year. That's $670 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%$4,881
Highlands at Mayfield Ranch MUDMUD0.4850%$2,253
Williamson CountyCounty0.3694%$1,717
Williamson County ESD #9 - Round RockESD0.0999%$464
Williamson County FM/RdCounty0.0443%$206
Upper Brushy Creek WCIDWater0.0170%$79
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$9,600

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $440,040 would pay approximately $2,747 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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