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8257 AREZZO DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath2,238 sqftBuilt 2016

Property at a Glance

This home is estimated between $375,022 and $786,049, with a best estimate of $442,572. 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

$375,022 $786,049
Best Estimate
$442,572
WCAD Value
$451,214
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $375,022 and $786,049. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

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 $441,978

Adjusted +$6,342 for 30 sqft more living space and +$4,457 for being newer. Net adjustment: +$10,799.

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 $375,022

Adjusted -$44,396 for 210 sqft less living space and -$2,229 for being older. Net adjustment: -$46,625.

4 bed 3 bath 2,470 sqft Built 2013
Raw Value $828,410
Adjusted Value $786,049

Adjusted -$49,047 for 232 sqft less living space and +$6,686 for being newer. Net adjustment: -$42,361.

6101 MANTALCINO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,887 sqft Built 2016
Raw Value $423,749
Adjusted Value $497,954

Adjusted +$74,205 for 351 sqft more living space. Net adjustment: +$74,205.

5905 MANTALCINO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 4 bath 2,328 sqft Built 2015
Raw Value $459,370
Adjusted Value $442,572

Adjusted -$19,027 for 90 sqft less living space and +$2,229 for being newer. Net adjustment: -$16,798.

The Neighborhood

This home is valued 11.0% 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
$451,214
Median
$406,354

This home is +11.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,386 across all districts. With a homestead exemption claimed, that drops to $8,616 — saving $1,770 per year. That's $718 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%$5,438
Siena MUD #1MUD0.5250%$2,369
Williamson CountyCounty0.3694%$1,667
Williamson County ESD #3 - HuttoESD0.1000%$451
Williamson County FM/RdCounty0.0443%$200
EWC Higher Ed Centerspecial0.0409%$184
Upper Brushy Creek WCIDWater0.0170%$77
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$10,386

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $442,572 would pay approximately $2,763 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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