Beta Williamson County, TX only — data and coverage are limited during early access.

400 ALTON CV, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

5 bed5 bath3,190 sqftBuilt 2016

Property at a Glance

This home is estimated between $650,502 and $913,994, with a best estimate of $793,208. That places the property below the R501615D - FOREST GROVES median of $977,717, in a neighborhood that appreciated 1.9% over the past year.

Estimated Value Range

$650,502 $913,994
Best Estimate
$793,208
WCAD Value
$1,028,840
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 $650,502 and $913,994. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

404 ALTON CV, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 4 bath 3,841 sqft Built 2017
Raw Value $1,093,327
Adjusted Value $913,994

Adjusted -$179,333 for 651 sqft less living space. Net adjustment: -$179,333.

408 ALTON CV, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 4 bath 3,700 sqft Built 2017
Raw Value $903,293
Adjusted Value $762,802

Adjusted -$140,491 for 510 sqft less living space. Net adjustment: -$140,491.

405 ALTON CV, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 3,435 sqft Built 2018
Raw Value $860,699
Adjusted Value $793,208

Adjusted -$67,491 for 245 sqft less living space. Net adjustment: -$67,491.

4 bed 3 bath 2,131 sqft Built 2011
Raw Value $505,122
Adjusted Value $796,848

Adjusted +$291,726 for 1,059 sqft more living space. Net adjustment: +$291,726.

3 bed 2 bath 2,311 sqft Built 2017
Raw Value $408,361
Adjusted Value $650,502

Adjusted +$242,141 for 879 sqft more living space. Net adjustment: +$242,141.

The Neighborhood

This home is valued 5.2% above the R501615D - FOREST GROVES median of $977,717. With 29 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 1.9% over the past year.

R501615D - FOREST GROVES

typical
29 Properties
$977,717 Median Value
+1.9% YoY Change
0% Have Pool
100% Have Garage
This Home
$1,028,840
Median
$977,717

This home is +5.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $18,512 across all districts. With a homestead exemption claimed, that drops to $17,071 — saving $1,441 per year. That's $1,423 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%$9,189
Round RockCity0.3720%$3,827
Williamson CountyCounty0.3694%$3,801
Austin Community Collegespecial0.1034%$1,064
Williamson County FM/RdCounty0.0443%$456
Upper Brushy Creek WCIDWater0.0170%$175
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$18,512

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $793,208 would pay approximately $4,951 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.

View full property details