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4009 CASTLE CREEK, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,913 sqftBuilt 1999

Property at a Glance

This home is estimated between $507,880 and $790,074, with a best estimate of $677,448. That places the property above the L494500D - Vista Oaks Sec 5B Ph 2 & SEC 5C median of $449,628, in a neighborhood that declined 2.9% over the past year.

Estimated Value Range

$507,880 $790,074
Best Estimate
$677,448
WCAD Value
$571,403
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in L494500D - Vista Oaks Sec 5B Ph 2 & SEC 5C. The estimated range of $507,880 and $790,074 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $785,762

Adjusted -$67,855 for 241 sqft less living space and -$7,105 for being older. Net adjustment: -$74,960.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $507,880

Adjusted -$845 for 3 sqft less living space and -$53,286 for being older. Net adjustment: -$54,131.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $517,551

Adjusted -$845 for 3 sqft less living space and -$60,390 for being older. Net adjustment: -$61,235.

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $677,448

Adjusted +$28,719 for 102 sqft more living space and -$53,286 for being older. Net adjustment: -$24,567.

4 bed 3 bath 2,219 sqft Built 2007
Raw Value $904,649
Adjusted Value $790,074

Adjusted -$86,156 for 306 sqft less living space and -$28,419 for being older. Net adjustment: -$114,575.

The Neighborhood

This home is valued 27.1% above the L494500D - Vista Oaks Sec 5B Ph 2 & SEC 5C median of $449,628. With 904 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 2.9% over the past year.

L494500D - Vista Oaks Sec 5B Ph 2 & SEC 5C

above average
904 Properties
$449,628 Median Value
-2.9% YoY Change
1% Have Pool
99% Have Garage
This Home
$571,403
Median
$449,628

This home is +27.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $11,051 across all districts. With a homestead exemption claimed, that drops to $9,424 — saving $1,627 per year. That's $785 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
Leander ISDSchool1.0869%$6,211
Williamson CountyCounty0.3694%$2,111
Vista Oaks MUDMUD0.2131%$1,218
Austin Community Collegespecial0.1034%$591
Williamson County ESD #9 - Round RockESD0.0999%$571
Williamson County FM/RdCounty0.0443%$253
Upper Brushy Creek WCIDWater0.0170%$97
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9341%$11,051

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $677,448 would pay approximately $4,229 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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