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4229 COUNTY ROAD 123, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

1 bed4 bath5,497 sqftBuilt 2014

Property at a Glance

This home is estimated between $1,332,520 and $1,458,623, with a best estimate of $1,367,740. 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

$1,332,520 $1,458,623
Best Estimate
$1,367,740
WCAD Value
$1,120,291
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 $1,332,520 and $1,458,623 should be treated as a rough guide.

Comparable Properties (5)

4227 COUNTY ROAD 123, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 4 bath 5,981 sqft Built 2015
Raw Value $1,487,900
Adjusted Value $1,332,520

Adjusted -$152,740 for 484 sqft less living space and -$2,640 for being older. Net adjustment: -$155,380.

5 bed 3 bath 2,415 sqft Built 2018
Raw Value $385,211
Adjusted Value $1,347,261

Adjusted +$972,610 for 3,082 sqft more living space and -$10,560 for being older. Net adjustment: +$962,050.

3 bed 2 bath 2,354 sqft Built 2016
Raw Value $381,160
Adjusted Value $1,367,740

Adjusted +$991,860 for 3,143 sqft more living space and -$5,280 for being older. Net adjustment: +$986,580.

3 bed 1,951 sqft Built 2018
Raw Value $350,145
Adjusted Value $1,458,623

Adjusted +$1,119,038 for 3,546 sqft more living space and -$10,560 for being older. Net adjustment: +$1,108,478.

3 bed 2 bath 2,085 sqft Built 2017
Raw Value $354,970
Adjusted Value $1,423,801

Adjusted +$1,076,751 for 3,412 sqft more living space and -$7,920 for being older. Net adjustment: +$1,068,831.

The Neighborhood

This home is valued 73.7% 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
$1,120,291
Median
$644,778

This home is +73.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $19,905 across all districts. With a homestead exemption claimed, that drops to $18,011 — saving $1,894 per year. That's $1,501 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%$13,502
Williamson CountyCounty0.3694%$4,139
Williamson County ESD #9 - Round RockESD0.0999%$1,119
Williamson County FM/RdCounty0.0443%$497
EWC Higher Ed Centerspecial0.0409%$458
Upper Brushy Creek WCIDWater0.0170%$190
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7768%$19,905

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $1,367,740 would pay approximately $8,537 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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