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

3501 GUADALAJARA ST, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath2,107 sqftBuilt 2012

Property at a Glance

This home is estimated between $381,910 and $482,316, with a best estimate of $397,003. That places the property above the R493607C - PALOMA LAKE SEC 18 median of $387,915, in a neighborhood that declined 9.2% over the past year.

Estimated Value Range

$381,910 $482,316
Best Estimate
$397,003
WCAD Value
$448,578
Low Confidence

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

There are 5 comparable properties within range, but none are in R493607C - PALOMA LAKE SEC 18. The estimated range of $381,910 and $482,316 should be treated as a rough guide.

Comparable Properties (5)

3 bed 1,828 sqft Built 2015
Raw Value $348,379
Adjusted Value $405,802

Adjusted +$55,841 for 279 sqft more living space and +$1,582 for being newer. Net adjustment: +$57,423.

4 bed 2 bath 1,739 sqft Built 2014
Raw Value $407,607
Adjusted Value $482,316

Adjusted +$73,654 for 368 sqft more living space and +$1,055 for being newer. Net adjustment: +$74,709.

3 bed 2 bath 2,040 sqft Built 2014
Raw Value $376,585
Adjusted Value $391,050

Adjusted +$13,410 for 67 sqft more living space and +$1,055 for being newer. Net adjustment: +$14,465.

3 bed 2 bath 2,040 sqft Built 2014
Raw Value $382,538
Adjusted Value $397,003

Adjusted +$13,410 for 67 sqft more living space and +$1,055 for being newer. Net adjustment: +$14,465.

3 bed 2 bath 2,194 sqft Built 2014
Raw Value $398,268
Adjusted Value $381,910

Adjusted -$17,413 for 87 sqft less living space and +$1,055 for being newer. Net adjustment: -$16,358.

The Neighborhood

This home is valued 15.6% above the R493607C - PALOMA LAKE SEC 18 median of $387,915. With 295 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 9.2% over the past year.

R493607C - PALOMA LAKE SEC 18

above average
295 Properties
$387,915 Median Value
-9.2% YoY Change
0% Have Pool
100% Have Garage
This Home
$448,578
Median
$387,915

This home is +15.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,741 across all districts. With a homestead exemption claimed, that drops to $7,408 — saving $1,333 per year. That's $617 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%$4,006
Paloma Lakes MUD #2MUD0.4215%$1,891
Williamson CountyCounty0.3694%$1,657
Austin Community Collegespecial0.1034%$464
Williamson County ESD #9 - Round RockESD0.0999%$448
Williamson County FM/RdCounty0.0443%$199
Upper Brushy Creek WCIDWater0.0170%$76
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9487%$8,741

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $397,003 would pay approximately $2,478 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