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

3500 ROSALINA LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath1,119 sqftBuilt 2010

Property at a Glance

This home is estimated between $412,240 and $461,805, with a best estimate of $424,649. 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

$412,240 $461,805
Best Estimate
$424,649
WCAD Value
$451,778
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 $412,240 and $461,805 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 1,011 sqft Built 2019
Raw Value $398,286
Adjusted Value $424,649

Adjusted +$21,616 for 108 sqft more living space and +$4,747 for being newer. Net adjustment: +$26,363.

4 bed 3 bath 956 sqft Built 2024
Raw Value $372,231
Adjusted Value $412,240

Adjusted +$32,624 for 163 sqft more living space and +$7,385 for being newer. Net adjustment: +$40,009.

4 bed 3 bath 950 sqft Built 2024
Raw Value $371,718
Adjusted Value $412,928

Adjusted +$33,825 for 169 sqft more living space and +$7,385 for being newer. Net adjustment: +$41,210.

4 bed 2 bath 1,279 sqft Built 2006
Raw Value $495,938
Adjusted Value $461,805

Adjusted -$32,023 for 160 sqft less living space and -$2,110 for being older. Net adjustment: -$34,133.

3 bed 2 bath 1,170 sqft Built 2007
Raw Value $447,811
Adjusted Value $436,022

Adjusted -$10,207 for 51 sqft less living space and -$1,582 for being older. Net adjustment: -$11,789.

The Neighborhood

This home is valued 16.5% 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
$451,778
Median
$387,915

This home is +16.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,804 across all districts. With a homestead exemption claimed, that drops to $7,470 — saving $1,334 per year. That's $623 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%$4,035
Paloma Lakes MUD #2MUD0.4215%$1,904
Williamson CountyCounty0.3694%$1,669
Austin Community Collegespecial0.1034%$467
Williamson County ESD #9 - Round RockESD0.0999%$451
Williamson County FM/RdCounty0.0443%$200
Upper Brushy Creek WCIDWater0.0170%$77
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9487%$8,804

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $424,649 would pay approximately $2,651 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