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3637 ROSALINA LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath1,140 sqftBuilt 2009

Property at a Glance

This home is estimated between $228,468 and $377,550, with a best estimate of $335,580. That places the property below the R493607C - PALOMA LAKE SEC 18 median of $387,915, in a neighborhood that declined 9.2% over the past year.

Estimated Value Range

$228,468 $377,550
Best Estimate
$335,580
WCAD Value
$434,108
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $228,468 and $377,550. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3636 ROSALINA LOOP, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
4 bed 3 bath 1,956 sqft Built 2009
Raw Value $472,978
Adjusted Value $309,658

Adjusted -$163,320 for 816 sqft less living space. Net adjustment: -$163,320.

3648 ROSALINA LOOP, ROUND ROCK, TX 78665
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,758 sqft Built 2009
Raw Value $501,241
Adjusted Value $377,550

Adjusted -$123,691 for 618 sqft less living space. Net adjustment: -$123,691.

3653 ROSALINA LOOP, ROUND ROCK, TX 78665
0.05 mi 98% similar Same subdivision
4 bed 2 bath 1,704 sqft Built 2009
Raw Value $448,463
Adjusted Value $335,580

Adjusted -$112,883 for 564 sqft less living space. Net adjustment: -$112,883.

3668 ROSALINA LOOP, ROUND ROCK, TX 78665
0.06 mi 94% similar Same subdivision
3 bed 2 bath 1,748 sqft Built 2009
Raw Value $350,157
Adjusted Value $228,468

Adjusted -$121,689 for 608 sqft less living space. Net adjustment: -$121,689.

4 bed 2 bath 1,340 sqft Built 2004
Raw Value $412,179
Adjusted Value $369,513

Adjusted -$40,029 for 200 sqft less living space and -$2,637 for being older. Net adjustment: -$42,666.

The Neighborhood

This home is valued 11.9% 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

typical
295 Properties
$387,915 Median Value
-9.2% YoY Change
0% Have Pool
100% Have Garage
This Home
$434,108
Median
$387,915

This home is +11.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,459 across all districts. With a homestead exemption claimed, that drops to $7,129 — saving $1,330 per year. That's $594 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%$3,877
Paloma Lakes MUD #2MUD0.4215%$1,830
Williamson CountyCounty0.3694%$1,604
Austin Community Collegespecial0.1034%$449
Williamson County ESD #9 - Round RockESD0.0999%$434
Williamson County FM/RdCounty0.0443%$192
Upper Brushy Creek WCIDWater0.0170%$74
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9487%$8,459

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $335,580 would pay approximately $2,095 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.

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