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8505 REGGIO ST, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath1,531 sqftBuilt 2014

Property at a Glance

This home is estimated between $314,081 and $460,250, with a best estimate of $410,551. 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

$314,081 $460,250
Best Estimate
$410,551
WCAD Value
$436,903
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 $314,081 and $460,250. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

6041 ROMA ST, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,748 sqft Built 2014
Raw Value $456,427
Adjusted Value $410,551

Adjusted -$45,876 for 217 sqft less living space. Net adjustment: -$45,876.

8104 ROSANO ST, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,347 sqft Built 2015
Raw Value $423,580
Adjusted Value $460,250

Adjusted +$38,899 for 184 sqft more living space and -$2,229 for being older. Net adjustment: +$36,670.

5637 SACCO ST, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,544 sqft Built 2017
Raw Value $338,329
Adjusted Value $328,895

Adjusted -$2,748 for 13 sqft less living space and -$6,686 for being older. Net adjustment: -$9,434.

8050 MOZART ST, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,610 sqft Built 2016
Raw Value $335,239
Adjusted Value $314,081

Adjusted -$16,701 for 79 sqft less living space and -$4,457 for being older. Net adjustment: -$21,158.

8379 PAOLA ST, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,313 sqft Built 2015
Raw Value $593,874
Adjusted Value $426,323

Adjusted -$165,322 for 782 sqft less living space and -$2,229 for being older. Net adjustment: -$167,551.

The Neighborhood

This home is valued 7.5% 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
$436,903
Median
$406,354

This home is +7.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,056 across all districts. With a homestead exemption claimed, that drops to $8,288 — saving $1,768 per year. That's $691 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%$5,266
Siena MUD #1MUD0.5250%$2,294
Williamson CountyCounty0.3694%$1,614
Williamson County ESD #9 - Round RockESD0.0999%$437
Williamson County FM/RdCounty0.0443%$194
EWC Higher Ed Centerspecial0.0409%$179
Upper Brushy Creek WCIDWater0.0170%$74
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$10,056

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $410,551 would pay approximately $2,563 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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