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

5812 SARDINIA DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath930 sqftBuilt 2015

Property at a Glance

This home is estimated between $183,778 and $358,576, with a best estimate of $197,993. 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

$183,778 $358,576
Best Estimate
$197,993
WCAD Value
$359,676
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in H121413C - SIENA. The estimated range of $183,778 and $358,576 should be treated as a rough guide.

Comparable Properties (5)

7832 LEONARDO DR, ROUND ROCK, TX 78665
0.00 mi 85% similar Same subdivision
4 bed 3 bath 1,575 sqft Built 2017
Raw Value $499,392
Adjusted Value $358,576

Adjusted -$136,359 for 645 sqft less living space and -$4,457 for being older. Net adjustment: -$140,816.

6101 MANTALCINO DR, ROUND ROCK, TX 78665
0.00 mi 82% similar Same subdivision
4 bed 3 bath 1,887 sqft Built 2016
Raw Value $423,749
Adjusted Value $219,201

Adjusted -$202,319 for 957 sqft less living space and -$2,229 for being older. Net adjustment: -$204,548.

3 bed 2 bath 1,758 sqft Built 2014
Raw Value $356,596
Adjusted Value $183,778

Adjusted -$175,047 for 828 sqft less living space and +$2,229 for being newer. Net adjustment: -$172,818.

4 bed 3 bath 2,588 sqft Built 2020
Raw Value $559,621
Adjusted Value $197,961

Adjusted -$350,517 for 1,658 sqft less living space and -$11,143 for being older. Net adjustment: -$361,660.

4 bed 3 bath 2,532 sqft Built 2021
Raw Value $550,043
Adjusted Value $197,993

Adjusted -$338,678 for 1,602 sqft less living space and -$13,372 for being older. Net adjustment: -$352,050.

The Neighborhood

This home is valued 11.5% 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
$359,676
Median
$406,354

This home is -11.5% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,279 across all districts. With a homestead exemption claimed, that drops to $6,525 — saving $1,754 per year. That's $544 per month a buyer should budget. The assessed value increased +0.5% vs the subdivision average of -5.4%. This above-average increase gives a protest opportunity score of 30 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Hutto ISDSchool1.2052%$4,335
Siena MUD #1MUD0.5250%$1,888
Williamson CountyCounty0.3694%$1,329
Williamson County ESD #3 - HuttoESD0.1000%$360
Williamson County FM/RdCounty0.0443%$159
EWC Higher Ed Centerspecial0.0409%$147
Upper Brushy Creek WCIDWater0.0170%$61
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$8,279
30 / 100

Some opportunity.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $197,993 would pay approximately $1,236 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 4/19/2026.

View full property details