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9 HIDDEN ACRES DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath2,525 sqftBuilt 1977

Property at a Glance

This home is estimated between $367,028 and $601,502, with a best estimate of $529,928. That places the property above the R427578G - Hidden Acres & Sec 2 median of $412,870, in a neighborhood that declined 4.2% over the past year.

Estimated Value Range

$367,028 $601,502
Best Estimate
$529,928
WCAD Value
$420,900
High Confidence

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

Based on 5 comparable properties in R427578G - Hidden Acres & Sec 2, this home's estimated market value is between $367,028 and $601,502. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

18 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,828 sqft Built 1977
Raw Value $426,884
Adjusted Value $575,113

Adjusted +$148,229 for 697 sqft more living space. Net adjustment: +$148,229.

14 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,990 sqft Built 1977
Raw Value $465,918
Adjusted Value $367,028

Adjusted -$98,890 for 465 sqft less living space. Net adjustment: -$98,890.

17 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,857 sqft Built 1979
Raw Value $527,905
Adjusted Value $433,160

Adjusted -$70,605 for 332 sqft less living space and -$24,140 for being older. Net adjustment: -$94,745.

12 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 98% similar Same subdivision
4 bed 2 bath 1,411 sqft Built 1981
Raw Value $412,870
Adjusted Value $601,502

Adjusted +$236,911 for 1,114 sqft more living space and -$48,279 for being older. Net adjustment: +$188,632.

16 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 97% similar Same subdivision
3 bed 2 bath 1,485 sqft Built 1977
Raw Value $308,754
Adjusted Value $529,928

Adjusted +$221,174 for 1,040 sqft more living space. Net adjustment: +$221,174.

The Neighborhood

This home is valued 1.9% above the R427578G - Hidden Acres & Sec 2 median of $412,870. With 19 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.2% over the past year.

R427578G - Hidden Acres & Sec 2

typical
19 Properties
$412,870 Median Value
-4.2% YoY Change
26% Have Pool
84% Have Garage
This Home
$420,900
Median
$412,870

This home is +1.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,428 across all districts. With a homestead exemption claimed, that drops to $5,100 — saving $1,328 per year. That's $425 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%$3,759
Williamson CountyCounty0.3694%$1,555
Austin Community Collegespecial0.1034%$435
Williamson County ESD #9 - Round RockESD0.0999%$421
Williamson County FM/RdCounty0.0443%$187
Upper Brushy Creek WCIDWater0.0170%$72
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$6,428

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $529,928 would pay approximately $3,308 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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