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4026 CASTLE CREEK, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath2,284 sqftBuilt 1998

Property at a Glance

This home is estimated between $332,584 and $890,979, with a best estimate of $702,495. 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

$332,584 $890,979
Best Estimate
$702,495
WCAD Value
$620,139
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 $332,584 and $890,979 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 $886,667

Adjusted +$36,602 for 130 sqft more living space and -$10,657 for being older. Net adjustment: +$25,945.

4 bed 3 bath 2,219 sqft Built 2007
Raw Value $904,649
Adjusted Value $890,979

Adjusted +$18,301 for 65 sqft more living space and -$31,971 for being older. Net adjustment: -$13,670.

4 bed 2 bath 3,110 sqft Built 2000
Raw Value $572,254
Adjusted Value $332,584

Adjusted -$232,565 for 826 sqft less living space and -$7,105 for being older. Net adjustment: -$239,670.

3 bed 2 bath 2,221 sqft Built 2014
Raw Value $741,595
Adjusted Value $702,495

Adjusted +$17,738 for 63 sqft more living space and -$56,838 for being older. Net adjustment: -$39,100.

3 bed 2 bath 2,248 sqft Built 2018
Raw Value $479,901
Adjusted Value $418,989

Adjusted +$10,136 for 36 sqft more living space and -$71,048 for being older. Net adjustment: -$60,912.

The Neighborhood

This home is valued 37.9% 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
$620,139
Median
$449,628

This home is +37.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $11,994 across all districts. With a homestead exemption claimed, that drops to $10,358 — saving $1,636 per year. That's $863 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%$6,740
Williamson CountyCounty0.3694%$2,291
Vista Oaks MUDMUD0.2131%$1,322
Austin Community Collegespecial0.1034%$641
Williamson County ESD #9 - Round RockESD0.0999%$620
Williamson County FM/RdCounty0.0443%$275
Upper Brushy Creek WCIDWater0.0170%$105
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9341%$11,994

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $702,495 would pay approximately $4,385 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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