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5822 CASSTELLO DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,674 sqftBuilt 2016

Property at a Glance

This home is estimated between $311,776 and $365,251, with a best estimate of $339,583. That places the property below the H123414C - SIENA LIMMER LOOP median of $417,399, in a neighborhood that declined 2.7% over the past year.

Estimated Value Range

$311,776 $365,251
Best Estimate
$339,583
WCAD Value
$364,281
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in H123414C - SIENA LIMMER LOOP. The estimated range of $311,776 and $365,251 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,845 sqft Built 2015
Raw Value $346,483
Adjusted Value $312,286

Adjusted -$35,840 for 171 sqft less living space and +$1,643 for being newer. Net adjustment: -$34,197.

3 bed 2 bath 1,706 sqft Built 2017
Raw Value $347,933
Adjusted Value $339,583

Adjusted -$6,707 for 32 sqft less living space and -$1,643 for being older. Net adjustment: -$8,350.

3 bed 2 bath 1,855 sqft Built 2015
Raw Value $348,069
Adjusted Value $311,776

Adjusted -$37,936 for 181 sqft less living space and +$1,643 for being newer. Net adjustment: -$36,293.

3 bed 2 bath 1,775 sqft Built 2010
Raw Value $376,561
Adjusted Value $365,251

Adjusted -$21,169 for 101 sqft less living space and +$9,859 for being newer. Net adjustment: -$11,310.

3 bed 2 bath 1,801 sqft Built 2015
Raw Value $367,178
Adjusted Value $342,203

Adjusted -$26,618 for 127 sqft less living space and +$1,643 for being newer. Net adjustment: -$24,975.

The Neighborhood

This home is valued 12.7% below the H123414C - SIENA LIMMER LOOP median of $417,399. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 2.7% over the past year.

H123414C - SIENA LIMMER LOOP

typical
1,146 Properties
$417,399 Median Value
-2.7% YoY Change
0% Have Pool
100% Have Garage
This Home
$364,281
Median
$417,399

This home is -12.7% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,666 across all districts. With a homestead exemption claimed, that drops to $6,911 — saving $1,755 per year. That's $576 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%$4,390
Siena MUD #2MUD0.6020%$2,193
Williamson CountyCounty0.3694%$1,346
Williamson County ESD #3 - HuttoESD0.1000%$364
Williamson County FM/RdCounty0.0443%$161
EWC Higher Ed Centerspecial0.0409%$149
Upper Brushy Creek WCIDWater0.0170%$62
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3788%$8,666

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $339,583 would pay approximately $2,120 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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