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4021 RIARDO DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath2,902 sqftBuilt 2025

Property at a Glance

This home is estimated between $479,975 and $833,244, with a best estimate of $738,781. That places the property above the H123421C - SALERNO median of $416,826, in a neighborhood that appreciated 99.5% over the past year.

Estimated Value Range

$479,975 $833,244
Best Estimate
$738,781
WCAD Value
$490,894
High Confidence

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

Based on 5 comparable properties in H123421C - SALERNO, this home's estimated market value is between $479,975 and $833,244. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3834 RIARDO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,275 sqft Built 2022
Raw Value $581,892
Adjusted Value $752,411

Adjusted +$179,893 for 627 sqft more living space and -$9,374 for being older. Net adjustment: +$170,519.

4030 RIARDO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,665 sqft Built 2025
Raw Value $125,066
Adjusted Value $479,975

Adjusted +$354,909 for 1,237 sqft more living space. Net adjustment: +$354,909.

3916 RIARDO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,722 sqft Built 2022
Raw Value $451,633
Adjusted Value $493,903

Adjusted +$51,644 for 180 sqft more living space and -$9,374 for being older. Net adjustment: +$42,270.

4010 RIARDO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,289 sqft Built 2025
Raw Value $562,904
Adjusted Value $738,781

Adjusted +$175,877 for 613 sqft more living space. Net adjustment: +$175,877.

3822 RIARDO DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,901 sqft Built 2022
Raw Value $555,420
Adjusted Value $833,244

Adjusted +$287,198 for 1,001 sqft more living space and -$9,374 for being older. Net adjustment: +$277,824.

The Neighborhood

This home is valued 17.8% above the H123421C - SALERNO median of $416,826. With 997 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 99.5% over the past year.

H123421C - SALERNO

above average
997 Properties
$416,826 Median Value
+99.5% YoY Change
0% Have Pool
100% Have Garage
This Home
$490,894
Median
$416,826

This home is +17.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $13,396 across all districts. With a homestead exemption claimed, that drops to $11,618 — saving $1,778 per year. That's $968 per month a buyer should budget. The assessed value increased +990.9% vs the subdivision average of +99.5%. This above-average increase gives a protest opportunity score of 100 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Hutto ISDSchool1.2052%$5,916
Round Rock MUD #1MUD0.6800%$3,338
Round RockCity0.3720%$1,826
Williamson CountyCounty0.3694%$1,814
Williamson County FM/RdCounty0.0443%$218
EWC Higher Ed Centerspecial0.0409%$201
Upper Brushy Creek WCIDWater0.0170%$83
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.7288%$13,396
100 / 100

There may be a strong case to protest this appraisal.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $738,781 would pay approximately $4,611 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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