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5615 SABBIA DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath2,040 sqftBuilt 2015

Property at a Glance

This home is estimated between $330,935 and $414,087, with a best estimate of $387,708. 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

$330,935 $414,087
Best Estimate
$387,708
WCAD Value
$391,633
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 $330,935 and $414,087. 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 $387,708

Adjusted +$41,225 for 195 sqft more living space. Net adjustment: +$41,225.

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 $397,891

Adjusted -$35,517 for 168 sqft less living space and +$2,229 for being newer. Net adjustment: -$33,288.

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 $330,935

Adjusted -$86,255 for 408 sqft less living space and -$4,457 for being older. Net adjustment: -$90,712.

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 $414,087

Adjusted +$70,611 for 334 sqft more living space and -$4,457 for being older. Net adjustment: +$66,154.

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 $387,180

Adjusted +$39,111 for 185 sqft more living space. Net adjustment: +$39,111.

The Neighborhood

This home is valued 3.6% 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
$391,633
Median
$406,354

This home is -3.6% below the subdivision median.

Tax Analysis

The estimated annual property tax is $9,014 across all districts. With a homestead exemption claimed, that drops to $7,255 — saving $1,759 per year. That's $605 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%$4,720
Siena MUD #1MUD0.5250%$2,056
Williamson CountyCounty0.3694%$1,447
Williamson County ESD #9 - Round RockESD0.0999%$391
Williamson County FM/RdCounty0.0443%$174
EWC Higher Ed Centerspecial0.0409%$160
Upper Brushy Creek WCIDWater0.0170%$67
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$9,014

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $387,708 would pay approximately $2,420 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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