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400 RUBIO AVE, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,672 sqftBuilt 2018

Property at a Glance

This home is estimated between $443,129 and $747,815, with a best estimate of $559,137. That places the property above the R701575F - OLD TOWN ROUND ROCK median of $319,256, in a neighborhood that appreciated 4.3% over the past year.

Estimated Value Range

$443,129 $747,815
Best Estimate
$559,137
WCAD Value
$654,301
Medium Confidence

Based on 5 comparable properties(3 in the same subdivision)

Based on 5 comparable properties (3 in the same subdivision, 2 nearby), the estimated range is $443,129 and $747,815. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

712 MANDELL ST, ROUND ROCK, TX 78664
0.19 mi 87% similar Same subdivision
3 bed 2 bath 1,047 sqft Built 2018
Raw Value $587,339
Adjusted Value $747,815

Adjusted +$160,476 for 625 sqft more living space. Net adjustment: +$160,476.

801 TONY DR, ROUND ROCK, TX 78664
0.03 mi 85% similar Same subdivision
3 bed 2 bath 1,743 sqft Built 1982
Raw Value $341,623
Adjusted Value $559,137

Adjusted -$18,230 for 71 sqft less living space and +$111,324 for being newer and +$124,420 for having a garage. Net adjustment: +$217,514.

902 MANDELL ST S, ROUND ROCK, TX 78664
0.19 mi 84% similar Same subdivision
3 bed 2 bath 1,583 sqft Built 1980
Raw Value $433,823
Adjusted Value $574,184

Adjusted +$22,852 for 89 sqft more living space and +$117,509 for being newer. Net adjustment: +$140,361.

3 bed 2 bath 1,392 sqft Built 2015
Raw Value $361,959
Adjusted Value $443,129

Adjusted +$71,893 for 280 sqft more living space and +$9,277 for being newer. Net adjustment: +$81,170.

3 bed 2 bath 1,527 sqft Built 1985
Raw Value $323,748
Adjusted Value $463,025

Adjusted +$37,230 for 145 sqft more living space and +$102,047 for being newer. Net adjustment: +$139,277.

The Neighborhood

This home is valued 104.9% above the R701575F - OLD TOWN ROUND ROCK median of $319,256. With 360 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 4.3% over the past year.

R701575F - OLD TOWN ROUND ROCK

outlier high
360 Properties
$319,256 Median Value
+4.3% YoY Change
5% Have Pool
24% Have Garage
This Home
$654,301
Median
$319,256

This home is +104.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,870 across all districts. With a homestead exemption claimed, that drops to $5,550 — saving $1,320 per year. That's $463 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
Round Rock ISDSchool0.8931%$3,410
Round RockCity0.3720%$1,420
Williamson CountyCounty0.3694%$1,411
Austin Community Collegespecial0.1034%$395
Williamson County FM/RdCounty0.0443%$169
Upper Brushy Creek WCIDWater0.0170%$65
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,870

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $559,137 would pay approximately $3,490 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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