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1609/1611 WHIRLWIND TRL, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed4 bath1,971 sqftBuilt 1986

Property at a Glance

This home is estimated between $402,450 and $659,867, with a best estimate of $437,313. That places the property above the R450X - Round Rock East - Duplex median of $355,449, in a neighborhood that declined 8.7% over the past year.

Estimated Value Range

$402,450 $659,867
Best Estimate
$437,313
WCAD Value
$370,703
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in R450X - Round Rock East - Duplex. The estimated range of $402,450 and $659,867 should be treated as a rough guide.

Comparable Properties (5)

1605/1607 WHIRLWIND TRL, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 4 bath 1,971 sqft Built 1986
Raw Value $437,313
Adjusted Value $437,313

This comparable closely matches the subject property's features.

3 bed 2 bath 1,800 sqft Built 1975
Raw Value $407,651
Adjusted Value $493,667

Adjusted +$33,227 for 171 sqft more living space and +$11,002 for being newer and +$41,787 for having a garage. Net adjustment: +$86,016.

4 bed 3 bath 1,993 sqft Built 2010
Raw Value $688,146
Adjusted Value $659,867

Adjusted -$4,275 for 22 sqft less living space and -$24,004 for being older. Net adjustment: -$28,279.

3 bed 2 bath 1,392 sqft Built 1984
Raw Value $289,667
Adjusted Value $404,174

Adjusted +$112,507 for 579 sqft more living space and +$2,000 for being newer. Net adjustment: +$114,507.

3 bed 2 bath 1,288 sqft Built 1986
Raw Value $269,735
Adjusted Value $402,450

Adjusted +$132,715 for 683 sqft more living space. Net adjustment: +$132,715.

The Neighborhood

This home is valued 4.3% above the R450X - Round Rock East - Duplex median of $355,449. With 836 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.7% over the past year.

R450X - Round Rock East - Duplex

typical
836 Properties
$355,449 Median Value
-8.7% YoY Change
0% Have Pool
84% Have Garage
This Home
$370,703
Median
$355,449

This home is +4.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,670 across all districts. With a homestead exemption claimed, that drops to $5,351 — saving $1,319 per year. That's $446 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%$3,311
Round RockCity0.3720%$1,379
Williamson CountyCounty0.3694%$1,370
Austin Community Collegespecial0.1034%$383
Williamson County FM/RdCounty0.0443%$164
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,670

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $437,313 would pay approximately $2,730 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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