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4227 COUNTY ROAD 123, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed4 bath5,981 sqftBuilt 2015

Property at a Glance

This home is estimated between $1,275,671 and $1,614,003, with a best estimate of $1,502,641. That places the property above the H005D86H - Hutto Abstracts median of $644,778, in a neighborhood that appreciated 25.9% over the past year.

Estimated Value Range

$1,275,671 $1,614,003
Best Estimate
$1,502,641
WCAD Value
$1,487,900
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in H005D86H - Hutto Abstracts. The estimated range of $1,275,671 and $1,614,003 should be treated as a rough guide.

Comparable Properties (5)

4229 COUNTY ROAD 123, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
1 bed 4 bath 5,497 sqft Built 2014
Raw Value $1,120,291
Adjusted Value $1,275,671

Adjusted +$152,740 for 484 sqft more living space and +$2,640 for being newer. Net adjustment: +$155,380.

5 bed 3 bath 2,415 sqft Built 2018
Raw Value $385,211
Adjusted Value $1,502,641

Adjusted +$1,125,350 for 3,566 sqft more living space and -$7,920 for being older. Net adjustment: +$1,117,430.

5 bed 2 bath 2,423 sqft Built 2018
Raw Value $376,544
Adjusted Value $1,491,449

Adjusted +$1,122,825 for 3,558 sqft more living space and -$7,920 for being older. Net adjustment: +$1,114,905.

3 bed 2 bath 2,354 sqft Built 2016
Raw Value $381,160
Adjusted Value $1,523,120

Adjusted +$1,144,600 for 3,627 sqft more living space and -$2,640 for being older. Net adjustment: +$1,141,960.

3 bed 1,951 sqft Built 2018
Raw Value $350,145
Adjusted Value $1,614,003

Adjusted +$1,271,778 for 4,030 sqft more living space and -$7,920 for being older. Net adjustment: +$1,263,858.

The Neighborhood

This home is valued 130.8% above the H005D86H - Hutto Abstracts median of $644,778. With 1,074 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 25.9% over the past year.

H005D86H - Hutto Abstracts

outlier high
1,074 Properties
$644,778 Median Value
+25.9% YoY Change
3% Have Pool
35% Have Garage
This Home
$1,487,900
Median
$644,778

This home is +130.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $26,436 across all districts. With a homestead exemption claimed, that drops to $24,474 — saving $1,962 per year. That's $2,040 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
Hutto ISDSchool1.2052%$17,932
Williamson CountyCounty0.3694%$5,497
Williamson County ESD #9 - Round RockESD0.0999%$1,487
Williamson County FM/RdCounty0.0443%$660
EWC Higher Ed Centerspecial0.0409%$608
Upper Brushy Creek WCIDWater0.0170%$253
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7768%$26,436

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $1,502,641 would pay approximately $9,379 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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