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4006 CASTLE CREEK, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath1,993 sqftBuilt 1995

Property at a Glance

This home is estimated between $457,476 and $794,078, with a best estimate of $490,626. 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

$457,476 $794,078
Best Estimate
$490,626
WCAD Value
$584,402
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 $457,476 and $794,078 should be treated as a rough guide.

Comparable Properties (5)

4 bed 2 bath 1,934 sqft Built 1978
Raw Value $484,482
Adjusted Value $561,484

Adjusted +$16,612 for 59 sqft more living space and +$60,390 for being newer. Net adjustment: +$77,002.

3 bed 2 bath 1,675 sqft Built 1995
Raw Value $367,941
Adjusted Value $457,476

Adjusted +$89,535 for 318 sqft more living space. Net adjustment: +$89,535.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $794,078

Adjusted -$45,330 for 161 sqft less living space and -$21,314 for being older. Net adjustment: -$66,644.

3 bed 2 bath 1,877 sqft Built 1984
Raw Value $405,447
Adjusted Value $477,183

Adjusted +$32,660 for 116 sqft more living space and +$39,076 for being newer. Net adjustment: +$71,736.

3 bed 2 bath 2,044 sqft Built 1981
Raw Value $455,252
Adjusted Value $490,626

Adjusted -$14,359 for 51 sqft less living space and +$49,733 for being newer. Net adjustment: +$35,374.

The Neighborhood

This home is valued 30.0% 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
$584,402
Median
$449,628

This home is +30.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $11,303 across all districts. With a homestead exemption claimed, that drops to $9,673 — saving $1,630 per year. That's $806 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%$6,352
Williamson CountyCounty0.3694%$2,159
Vista Oaks MUDMUD0.2131%$1,245
Austin Community Collegespecial0.1034%$604
Williamson County ESD #9 - Round RockESD0.0999%$584
Williamson County FM/RdCounty0.0443%$259
Upper Brushy Creek WCIDWater0.0170%$99
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9341%$11,303

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $490,626 would pay approximately $3,062 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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