Beta Williamson County, TX only — data and coverage are limited during early access.

4345 CR 123, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,340 sqftBuilt 1980

Property at a Glance

This home is estimated between $246,262 and $445,119, with a best estimate of $279,757. That places the property below the H005D86H - Hutto Abstracts median of $644,778, in a neighborhood that appreciated 25.9% over the past year.

Estimated Value Range

$246,262 $445,119
Best Estimate
$279,757
WCAD Value
$527,054
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 $246,262 and $445,119 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,285 sqft Built 1981
Raw Value $265,040
Adjusted Value $279,757

Adjusted +$17,357 for 55 sqft more living space and -$2,640 for being older. Net adjustment: +$14,717.

3 bed 2 bath 1,314 sqft Built 1982
Raw Value $273,981
Adjusted Value $276,906

Adjusted +$8,205 for 26 sqft more living space and -$5,280 for being older. Net adjustment: +$2,925.

3 bed 2 bath 1,525 sqft Built 1981
Raw Value $307,284
Adjusted Value $246,262

Adjusted -$58,382 for 185 sqft less living space and -$2,640 for being older. Net adjustment: -$61,022.

3 bed 2 bath 1,260 sqft Built 1984
Raw Value $273,395
Adjusted Value $288,081

Adjusted +$25,246 for 80 sqft more living space and -$10,560 for being older. Net adjustment: +$14,686.

4260 CR 123, ROUND ROCK, TX 78664
0.00 mi 98% similar Same subdivision
4 bed 2 bath 2,074 sqft Built 1977
Raw Value $571,739
Adjusted Value $445,119

Adjusted -$231,634 for 734 sqft less living space and +$7,920 for being newer and +$97,094 for having a garage. Net adjustment: -$126,620.

The Neighborhood

This home is valued 18.3% below the H005D86H - Hutto Abstracts median of $644,778. That positions it competitively for buyers comparing within the neighborhood. The neighborhood appreciated 25.9% over the past year.

H005D86H - Hutto Abstracts

below average
1,074 Properties
$644,778 Median Value
+25.9% YoY Change
3% Have Pool
35% Have Garage
This Home
$527,054
Median
$644,778

This home is -18.3% below the subdivision median.

Tax Analysis

The estimated annual property tax is $7,387 across all districts. With a homestead exemption claimed, that drops to $5,623 — saving $1,764 per year. That's $469 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%$5,011
Williamson CountyCounty0.3694%$1,536
Williamson County ESD #9 - Round RockESD0.0999%$415
Williamson County FM/RdCounty0.0443%$184
EWC Higher Ed Centerspecial0.0409%$170
Upper Brushy Creek WCIDWater0.0170%$71
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7768%$7,387

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $279,757 would pay approximately $1,746 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.

View full property details