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

1813 WHIRLWIND TRL, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath967 sqftBuilt 1993

Property at a Glance

This home is estimated between $112,260 and $348,509, with a best estimate of $208,197. That places the property below the R602494H - Greenlawn Place median of $314,129, in a neighborhood that declined 4.3% over the past year.

Estimated Value Range

$112,260 $348,509
Best Estimate
$208,197
WCAD Value
$339,758
High Confidence

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

Based on 5 comparable properties in R602494H - Greenlawn Place, this home's estimated market value is between $112,260 and $348,509. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

1606 SOUTHWESTERN TRL, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 831 sqft Built 1995
Raw Value $299,441
Adjusted Value $326,880

Adjusted +$34,047 for 136 sqft more living space and -$6,608 for being older. Net adjustment: +$27,439.

1705 WHIRLWIND TRL, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 776 sqft Built 1994
Raw Value $303,997
Adjusted Value $348,509

Adjusted +$47,816 for 191 sqft more living space and -$3,304 for being older. Net adjustment: +$44,512.

1603 SOUTHWESTERN TRL, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,265 sqft Built 1995
Raw Value $289,408
Adjusted Value $208,197

Adjusted -$74,603 for 298 sqft less living space and -$6,608 for being older. Net adjustment: -$81,211.

2209 SOUTHEASTERN TRL, ROUND ROCK, TX 78664
0.00 mi 98% similar Same subdivision
4 bed 2 bath 1,751 sqft Built 1997
Raw Value $321,746
Adjusted Value $112,260

Adjusted -$196,270 for 784 sqft less living space and -$13,216 for being older. Net adjustment: -$209,486.

1902 SOUTHEASTERN TRL, ROUND ROCK, TX 78664
0.00 mi 96% similar Same subdivision
3 bed 2 bath 1,539 sqft Built 1998
Raw Value $305,880
Adjusted Value $146,162

Adjusted -$143,197 for 572 sqft less living space and -$16,521 for being older. Net adjustment: -$159,718.

The Neighborhood

This home is valued 8.2% above the R602494H - Greenlawn Place median of $314,129. With 219 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.3% over the past year.

R602494H - Greenlawn Place

typical
219 Properties
$314,129 Median Value
-4.3% YoY Change
1% Have Pool
99% Have Garage
This Home
$339,758
Median
$314,129

This home is +8.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,113 across all districts. With a homestead exemption claimed, that drops to $4,800 — saving $1,313 per year. That's $400 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%$3,034
Round RockCity0.3720%$1,264
Williamson CountyCounty0.3694%$1,255
Austin Community Collegespecial0.1034%$351
Williamson County FM/RdCounty0.0443%$151
Upper Brushy Creek WCIDWater0.0170%$58
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,113

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $208,197 would pay approximately $1,300 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