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5815 SABBIA CT, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath1,404 sqftBuilt 2018

Property at a Glance

This home is estimated between $281,507 and $578,097, with a best estimate of $491,927. That places the property above the H121413C - SIENA median of $406,354, in a neighborhood that declined 5.4% over the past year.

Estimated Value Range

$281,507 $578,097
Best Estimate
$491,927
WCAD Value
$439,580
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in H121413C - SIENA. The estimated range of $281,507 and $578,097 should be treated as a rough guide.

Comparable Properties (5)

5808 SABBIA CT, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,019 sqft Built 2017
Raw Value $409,295
Adjusted Value $281,507

Adjusted -$130,017 for 615 sqft less living space and +$2,229 for being newer. Net adjustment: -$127,788.

4 bed 3 bath 1,485 sqft Built 2016
Raw Value $504,406
Adjusted Value $491,739

Adjusted -$17,124 for 81 sqft less living space and +$4,457 for being newer. Net adjustment: -$12,667.

4 bed 3 bath 1,291 sqft Built 2015
Raw Value $499,506
Adjusted Value $530,081

Adjusted +$23,889 for 113 sqft more living space and +$6,686 for being newer. Net adjustment: +$30,575.

4 bed 3 bath 1,560 sqft Built 2008
Raw Value $588,791
Adjusted Value $578,097

Adjusted -$32,980 for 156 sqft less living space and +$22,286 for being newer. Net adjustment: -$10,694.

4 bed 2 bath 1,474 sqft Built 2015
Raw Value $500,040
Adjusted Value $491,927

Adjusted -$14,799 for 70 sqft less living space and +$6,686 for being newer. Net adjustment: -$8,113.

The Neighborhood

This home is valued 8.2% 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
$439,580
Median
$406,354

This home is +8.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,118 across all districts. With a homestead exemption claimed, that drops to $8,350 — saving $1,768 per year. That's $696 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%$5,298
Siena MUD #1MUD0.5250%$2,308
Williamson CountyCounty0.3694%$1,624
Williamson County ESD #9 - Round RockESD0.0999%$439
Williamson County FM/RdCounty0.0443%$195
EWC Higher Ed Centerspecial0.0409%$180
Upper Brushy Creek WCIDWater0.0170%$75
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$10,118

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $491,927 would pay approximately $3,071 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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