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4021 CR 123, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

Property at a Glance

There are not enough comparable properties nearby to estimate a price range. The Williamson County Appraisal District values this home at $1,533,513.

Estimated Value Range

WCAD Appraised Value $1,533,513

Comparable data is not yet available for this property. The Williamson County Appraisal District values it at $1,533,513.

The Neighborhood

This home is valued 158.0% above the R002D78G - East Round Rock Williamson Co Abstracts lt 20 Acs median of $594,322. With 82 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 11.1% over the past year.

R002D78G - East Round Rock Williamson Co Abstracts lt 20 Acs

outlier high
82 Properties
$594,322 Median Value
-11.1% YoY Change
1% Have Pool
43% Have Garage
This Home
$1,533,513
Median
$594,322

This home is +158.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $126 across all districts. With a homestead exemption claimed, that drops to $45 — saving $81 per year. That's $4 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%$63
Round RockCity0.3720%$26
Williamson CountyCounty0.3694%$26
Austin Community Collegespecial0.1034%$7
Williamson County FM/RdCounty0.0443%$3
Upper Brushy Creek WCIDWater0.0170%$1
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$126

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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