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12 HIDDEN ACRES DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath1,411 sqftBuilt 1981

Property at a Glance

This home is estimated between $232,268 and $463,089, with a best estimate of $341,296. That places the property below the R427578G - Hidden Acres & Sec 2 median of $412,870, in a neighborhood that declined 4.2% over the past year.

Estimated Value Range

$232,268 $463,089
Best Estimate
$341,296
WCAD Value
$412,870
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 $232,268 and $463,089. 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 $386,481

Adjusted -$88,682 for 417 sqft less living space and +$48,279 for being newer. Net adjustment: -$40,403.

16 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,485 sqft Built 1977
Raw Value $308,754
Adjusted Value $341,296

Adjusted -$15,737 for 74 sqft less living space and +$48,279 for being newer. Net adjustment: +$32,542.

21 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,017 sqft Built 1979
Raw Value $355,158
Adjusted Value $463,089

Adjusted +$83,791 for 394 sqft more living space and +$24,140 for being newer. Net adjustment: +$107,931.

11 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,477 sqft Built 1977
Raw Value $299,303
Adjusted Value $333,546

Adjusted -$14,036 for 66 sqft less living space and +$48,279 for being newer. Net adjustment: +$34,243.

9 HIDDEN ACRES DR, ROUND ROCK, TX 78665
0.00 mi 98% similar Same subdivision
4 bed 2 bath 2,525 sqft Built 1977
Raw Value $420,900
Adjusted Value $232,268

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

The Neighborhood

This home is in line with the R427578G - Hidden Acres & Sec 2 median of $412,870. 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
$412,870
Median
$412,870

This home is +0.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,305 across all districts. With a homestead exemption claimed, that drops to $4,979 — saving $1,326 per year. That's $415 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%$3,687
Williamson CountyCounty0.3694%$1,525
Austin Community Collegespecial0.1034%$427
Williamson County ESD #9 - Round RockESD0.0999%$413
Williamson County FM/RdCounty0.0443%$183
Upper Brushy Creek WCIDWater0.0170%$70
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$6,305

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $341,296 would pay approximately $2,130 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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