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

8 TIMBERLINE DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

2 bed1 bath5,329 sqftBuilt 2014

Property at a Glance

This home is estimated between $1,235,461 and $1,602,090, with a best estimate of $1,550,350. 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

$1,235,461 $1,602,090
Best Estimate
$1,550,350
WCAD Value
$1,041,771
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 $1,235,461 and $1,602,090. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

20 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 80% similar Same subdivision
3 bed 3,673 sqft Built 1980
Raw Value $839,539
Adjusted Value $1,602,090

Adjusted +$352,176 for 1,656 sqft more living space and +$410,375 for being newer. Net adjustment: +$762,551.

18 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 77% similar Same subdivision
2 bed 1 bath 1,697 sqft Built 1979
Raw Value $389,765
Adjusted Value $1,584,616

Adjusted +$772,406 for 3,632 sqft more living space and +$422,445 for being newer. Net adjustment: +$1,194,851.

12 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 70% similar Same subdivision
2 bed 2 bath 1,750 sqft Built 1978
Raw Value $354,701
Adjusted Value $1,550,350

Adjusted +$761,135 for 3,579 sqft more living space and +$434,514 for being newer. Net adjustment: +$1,195,649.

6 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 69% similar Same subdivision
3 bed 2 bath 2,040 sqft Built 1983
Raw Value $379,480
Adjusted Value $1,453,106

Adjusted +$699,461 for 3,289 sqft more living space and +$374,165 for being newer. Net adjustment: +$1,073,626.

4 bed 2 bath 2,622 sqft Built 1994
Raw Value $418,375
Adjusted Value $1,235,461

Adjusted +$575,689 for 2,707 sqft more living space and +$241,397 for being newer. Net adjustment: +$817,086.

The Neighborhood

This home is valued 152.3% 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
$1,041,771
Median
$412,870

This home is +152.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,291 across all districts. With a homestead exemption claimed, that drops to $12,868 — saving $1,423 per year. That's $1,072 per month a buyer should budget. The assessed value increased +23.5% vs the subdivision average of -4.2%. This above-average increase gives a protest opportunity score of 100 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$8,357
Williamson CountyCounty0.3694%$3,457
Austin Community Collegespecial0.1034%$968
Williamson County ESD #9 - Round RockESD0.0999%$935
Williamson County FM/RdCounty0.0443%$415
Upper Brushy Creek WCIDWater0.0170%$159
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$14,291
100 / 100

There may be a strong case to protest this appraisal.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $1,550,350 would pay approximately $9,677 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