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

3108 DIEGO CV, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,196 sqftBuilt 2017

Property at a Glance

This home is estimated between $242,657 and $463,248, with a best estimate of $258,030. That places the property below the R491507D - PALOMA LAKE PLANTATION, GRANDHAVEN median of $499,831, in a neighborhood that declined 1.7% over the past year.

Estimated Value Range

$242,657 $463,248
Best Estimate
$258,030
WCAD Value
$478,271
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R491507D - PALOMA LAKE PLANTATION, GRANDHAVEN. The estimated range of $242,657 and $463,248 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,528 sqft Built 2018
Raw Value $334,811
Adjusted Value $258,035

Adjusted -$72,400 for 332 sqft less living space and -$4,376 for being older. Net adjustment: -$76,776.

3 bed 2 bath 1,522 sqft Built 2019
Raw Value $337,874
Adjusted Value $258,030

Adjusted -$71,092 for 326 sqft less living space and -$8,752 for being older. Net adjustment: -$79,844.

3 bed 2 bath 909 sqft Built 2018
Raw Value $405,037
Adjusted Value $463,248

Adjusted +$62,587 for 287 sqft more living space and -$4,376 for being older. Net adjustment: +$58,211.

3 bed 2 bath 1,679 sqft Built 2019
Raw Value $356,738
Adjusted Value $242,657

Adjusted -$105,329 for 483 sqft less living space and -$8,752 for being older. Net adjustment: -$114,081.

3 bed 2 bath 1,539 sqft Built 2009
Raw Value $292,817
Adjusted Value $253,025

Adjusted -$74,799 for 343 sqft less living space and +$35,007 for being newer. Net adjustment: -$39,792.

The Neighborhood

This home is valued 4.3% below the R491507D - PALOMA LAKE PLANTATION, GRANDHAVEN median of $499,831. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 1.7% over the past year.

R491507D - PALOMA LAKE PLANTATION, GRANDHAVEN

typical
695 Properties
$499,831 Median Value
-1.7% YoY Change
1% Have Pool
100% Have Garage
This Home
$478,271
Median
$499,831

This home is -4.3% below the subdivision median.

Tax Analysis

The estimated annual property tax is $9,086 across all districts. With a homestead exemption claimed, that drops to $7,747 — saving $1,339 per year. That's $646 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%$4,271
Paloma Lakes MUD #1MUD0.3725%$1,782
Williamson CountyCounty0.3694%$1,767
Austin Community Collegespecial0.1034%$495
Williamson County ESD #9 - Round RockESD0.0999%$478
Williamson County FM/RdCounty0.0443%$212
Upper Brushy Creek WCIDWater0.0170%$81
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8997%$9,086

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $258,030 would pay approximately $1,611 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.

View full property details