Beta Williamson County, TX only — data and coverage are limited during early access.

6201 MANTALCINO DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,998 sqftBuilt 2018

Property at a Glance

This home is estimated between $328,742 and $411,894, with a best estimate of $385,515. 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

$328,742 $411,894
Best Estimate
$385,515
WCAD Value
$351,479
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 $328,742 and $411,894. 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 $385,515

Adjusted +$32,346 for 153 sqft more living space and +$6,686 for being newer. Net adjustment: +$39,032.

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 $395,697

Adjusted -$44,396 for 210 sqft less living space and +$8,914 for being newer. Net adjustment: -$35,482.

5857 MANTALCINO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,448 sqft Built 2017
Raw Value $421,647
Adjusted Value $328,742

Adjusted -$95,134 for 450 sqft less living space and +$2,229 for being newer. Net adjustment: -$92,905.

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 $411,894

Adjusted +$61,732 for 292 sqft more living space and +$2,229 for being newer. Net adjustment: +$63,961.

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 $384,987

Adjusted +$30,232 for 143 sqft more living space and +$6,686 for being newer. Net adjustment: +$36,918.

The Neighborhood

This home is valued 13.5% below the H121413C - SIENA median of $406,354. That positions it competitively for buyers comparing within the neighborhood. 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
$351,479
Median
$406,354

This home is -13.5% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,091 across all districts. With a homestead exemption claimed, that drops to $6,338 — saving $1,753 per year. That's $528 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%$4,236
Siena MUD #1MUD0.5250%$1,845
Williamson CountyCounty0.3694%$1,299
Williamson County ESD #3 - HuttoESD0.1000%$351
Williamson County FM/RdCounty0.0443%$156
EWC Higher Ed Centerspecial0.0409%$144
Upper Brushy Creek WCIDWater0.0170%$60
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$8,091

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $385,515 would pay approximately $2,406 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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