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

3659 ROSALINA LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath1,956 sqftBuilt 2009

Property at a Glance

This home is estimated between $372,984 and $780,546, with a best estimate of $399,747. 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

$372,984 $780,546
Best Estimate
$399,747
WCAD Value
$515,613
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in R493607C - PALOMA LAKE SEC 18. The estimated range of $372,984 and $780,546 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 1,975 sqft Built 2018
Raw Value $377,228
Adjusted Value $378,172

Adjusted -$3,803 for 19 sqft less living space and +$4,747 for being newer. Net adjustment: +$944.

3647 ROSALINA LOOP, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,740 sqft Built 2009
Raw Value $356,515
Adjusted Value $399,747

Adjusted +$43,232 for 216 sqft more living space. Net adjustment: +$43,232.

3716 ROSALINA LOOP, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,950 sqft Built 2009
Raw Value $371,783
Adjusted Value $372,984

Adjusted +$1,201 for 6 sqft more living space. Net adjustment: +$1,201.

4 bed 3 bath 2,411 sqft Built 2009
Raw Value $638,252
Adjusted Value $547,185

Adjusted -$91,067 for 455 sqft less living space. Net adjustment: -$91,067.

4 bed 3 bath 2,253 sqft Built 2017
Raw Value $835,770
Adjusted Value $780,546

Adjusted -$59,444 for 297 sqft less living space and +$4,220 for being newer. Net adjustment: -$55,224.

The Neighborhood

This home is valued 32.9% 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
$515,613
Median
$387,915

This home is +32.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,048 across all districts. With a homestead exemption claimed, that drops to $8,702 — saving $1,346 per year. That's $725 per month a buyer should budget. The assessed value increased +0.1% vs the subdivision average of -9.2%. This above-average increase gives a protest opportunity score of 47 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$4,605
Paloma Lakes MUD #2MUD0.4215%$2,173
Williamson CountyCounty0.3694%$1,905
Austin Community Collegespecial0.1034%$533
Williamson County ESD #9 - Round RockESD0.0999%$515
Williamson County FM/RdCounty0.0443%$229
Upper Brushy Creek WCIDWater0.0170%$88
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9487%$10,048
47 / 100

Moderate opportunity to protest.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $399,747 would pay approximately $2,495 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