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17 HIDDEN ACRES DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath2,857 sqftBuilt 1979

Property at a Glance

This home is estimated between $461,773 and $1,437,160, with a best estimate of $669,858. 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

$461,773 $1,437,160
Best Estimate
$669,858
WCAD Value
$527,905
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $461,773 and $1,437,160. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

9 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,525 sqft Built 1977
Raw Value $420,900
Adjusted Value $515,645

Adjusted +$70,605 for 332 sqft more living space and +$24,140 for being newer. Net adjustment: +$94,745.

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 $461,773

Adjusted -$28,285 for 133 sqft less living space and +$24,140 for being newer. Net adjustment: -$4,145.

18 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 97% similar Same subdivision
4 bed 2 bath 1,828 sqft Built 1977
Raw Value $426,884
Adjusted Value $669,858

Adjusted +$218,834 for 1,029 sqft more living space and +$24,140 for being newer. Net adjustment: +$242,974.

3 bed 3,226 sqft Built 1986
Raw Value $1,600,123
Adjusted Value $1,437,160

Adjusted -$78,474 for 369 sqft less living space and -$84,489 for being older. Net adjustment: -$162,963.

12 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 92% similar Same subdivision
4 bed 2 bath 1,411 sqft Built 1981
Raw Value $412,870
Adjusted Value $696,246

Adjusted +$307,516 for 1,446 sqft more living space and -$24,140 for being older. Net adjustment: +$283,376.

The Neighborhood

This home is valued 27.9% 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

above average
19 Properties
$412,870 Median Value
-4.2% YoY Change
26% Have Pool
84% Have Garage
This Home
$527,905
Median
$412,870

This home is +27.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,062 across all districts. With a homestead exemption claimed, that drops to $6,714 — saving $1,348 per year. That's $560 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%$4,715
Williamson CountyCounty0.3694%$1,950
Austin Community Collegespecial0.1034%$546
Williamson County ESD #9 - Round RockESD0.0999%$527
Williamson County FM/RdCounty0.0443%$234
Upper Brushy Creek WCIDWater0.0170%$90
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$8,062

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $669,858 would pay approximately $4,181 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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