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6144 MANTALCINO DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath1,921 sqftBuilt 2015

Property at a Glance

This home is estimated between $362,022 and $428,708, with a best estimate of $372,734. That places the property below the H121413C - SIENA median of $406,354, in a neighborhood that declined 5.4% over the past year.

Estimated Value Range

$362,022 $428,708
Best Estimate
$372,734
WCAD Value
$412,411
High Confidence

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

Based on 5 comparable properties in H121413C - SIENA, this home's estimated market value is between $362,022 and $428,708. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

6108 MANTALCINO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,845 sqft Built 2015
Raw Value $346,483
Adjusted Value $362,550

Adjusted +$16,067 for 76 sqft more living space. Net adjustment: +$16,067.

8206 AREZZO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,208 sqft Built 2014
Raw Value $431,179
Adjusted Value $372,734

Adjusted -$60,674 for 287 sqft less living space and +$2,229 for being newer. Net adjustment: -$58,445.

7945 BASSANO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,706 sqft Built 2017
Raw Value $347,933
Adjusted Value $388,929

Adjusted +$45,453 for 215 sqft more living space and -$4,457 for being older. Net adjustment: +$40,996.

6117 MANTALCINO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,855 sqft Built 2015
Raw Value $348,069
Adjusted Value $362,022

Adjusted +$13,953 for 66 sqft more living space. Net adjustment: +$13,953.

6101 MANTALCINO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,887 sqft Built 2016
Raw Value $423,749
Adjusted Value $428,708

Adjusted +$7,188 for 34 sqft more living space and -$2,229 for being older. Net adjustment: +$4,959.

The Neighborhood

This home is valued 1.5% above the H121413C - SIENA median of $406,354. With 1,611 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 5.4% over the past year.

H121413C - SIENA

typical
1,611 Properties
$406,354 Median Value
-5.4% YoY Change
1% Have Pool
100% Have Garage
This Home
$412,411
Median
$406,354

This home is +1.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $9,493 across all districts. With a homestead exemption claimed, that drops to $7,730 — saving $1,763 per year. That's $644 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
Hutto ISDSchool1.2052%$4,970
Siena MUD #1MUD0.5250%$2,165
Williamson CountyCounty0.3694%$1,524
Williamson County ESD #3 - HuttoESD0.1000%$412
Williamson County FM/RdCounty0.0443%$183
EWC Higher Ed Centerspecial0.0409%$169
Upper Brushy Creek WCIDWater0.0170%$70
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$9,493

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $372,734 would pay approximately $2,327 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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