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12 TIMBERLINE DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

2 bed2 bath1,750 sqftBuilt 1978

Property at a Glance

This home is estimated between $257,458 and $396,307, with a best estimate of $360,696. 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

$257,458 $396,307
Best Estimate
$360,696
WCAD Value
$354,701
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 $257,458 and $396,307. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

14 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,599 sqft Built 1979
Raw Value $340,653
Adjusted Value $360,696

Adjusted +$32,113 for 151 sqft more living space and -$12,070 for being older. Net adjustment: +$20,043.

10 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,780 sqft Built 1976
Raw Value $378,547
Adjusted Value $396,307

Adjusted -$6,380 for 30 sqft less living space and +$24,140 for being newer. Net adjustment: +$17,760.

18 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
2 bed 1 bath 1,697 sqft Built 1979
Raw Value $389,765
Adjusted Value $388,966

Adjusted +$11,271 for 53 sqft more living space and -$12,070 for being older. Net adjustment: -$799.

6 TIMBERLINE DR, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,040 sqft Built 1983
Raw Value $379,480
Adjusted Value $257,458

Adjusted -$61,673 for 290 sqft less living space and -$60,349 for being older. Net adjustment: -$122,022.

4 bed 2 bath 1,836 sqft Built 1994
Raw Value $503,855
Adjusted Value $292,448

Adjusted -$18,289 for 86 sqft less living space and -$193,118 for being older. Net adjustment: -$211,407.

The Neighborhood

This home is valued 14.1% below the R427578G - Hidden Acres & Sec 2 median of $412,870. That positions it competitively for buyers comparing within the neighborhood. 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
$354,701
Median
$412,870

This home is -14.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,417 across all districts. With a homestead exemption claimed, that drops to $4,101 — saving $1,316 per year. That's $342 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%$3,168
Williamson CountyCounty0.3694%$1,310
Austin Community Collegespecial0.1034%$367
Williamson County ESD #9 - Round RockESD0.0999%$354
Williamson County FM/RdCounty0.0443%$157
Upper Brushy Creek WCIDWater0.0170%$60
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$5,417

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $360,696 would pay approximately $2,251 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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