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20 TIMBERLINE DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed3,673 sqftBuilt 1980

Property at a Glance

This home is estimated between $690,555 and $829,404, with a best estimate of $793,794. 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

$690,555 $829,404
Best Estimate
$793,794
WCAD Value
$839,539
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 $690,555 and $829,404. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

6 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 95% similar Same subdivision
3 bed 2 bath 2,040 sqft Built 1983
Raw Value $379,480
Adjusted Value $690,555

Adjusted +$347,285 for 1,633 sqft more living space and -$36,210 for being older. Net adjustment: +$311,075.

10 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 92% similar Same subdivision
3 bed 2 bath 1,780 sqft Built 1976
Raw Value $378,547
Adjusted Value $829,404

Adjusted +$402,578 for 1,893 sqft more living space and +$48,279 for being newer. Net adjustment: +$450,857.

14 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 91% similar Same subdivision
3 bed 2 bath 1,599 sqft Built 1979
Raw Value $340,653
Adjusted Value $793,794

Adjusted +$441,071 for 2,074 sqft more living space and +$12,070 for being newer. Net adjustment: +$453,141.

12 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 87% similar Same subdivision
2 bed 2 bath 1,750 sqft Built 1978
Raw Value $354,701
Adjusted Value $787,799

Adjusted +$408,958 for 1,923 sqft more living space and +$24,140 for being newer. Net adjustment: +$433,098.

18 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 87% similar Same subdivision
2 bed 1 bath 1,697 sqft Built 1979
Raw Value $389,765
Adjusted Value $822,065

Adjusted +$420,230 for 1,976 sqft more living space and +$12,070 for being newer. Net adjustment: +$432,300.

The Neighborhood

This home is valued 103.3% 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

outlier high
19 Properties
$412,870 Median Value
-4.2% YoY Change
26% Have Pool
84% Have Garage
This Home
$839,539
Median
$412,870

This home is +103.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,821 across all districts. With a homestead exemption claimed, that drops to $11,416 — saving $1,405 per year. That's $951 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%$7,498
Williamson CountyCounty0.3694%$3,102
Austin Community Collegespecial0.1034%$868
Williamson County ESD #9 - Round RockESD0.0999%$839
Williamson County FM/RdCounty0.0443%$372
Upper Brushy Creek WCIDWater0.0170%$143
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$12,821

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $793,794 would pay approximately $4,955 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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