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1238 CR 170, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed7,474 sqftBuilt 1968

Property at a Glance

This home is estimated between $1,999,992 and $2,070,522, with a best estimate of $2,028,790. That places the property above the R20PS - Small Office(<10,000 Sf)-e Round Rock median of $1,404,458, in a neighborhood that declined 0.2% over the past year.

Estimated Value Range

$1,999,992 $2,070,522
Best Estimate
$2,028,790
WCAD Value
$6,528,093
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R20PS - Small Office(<10,000 Sf)-e Round Rock. The estimated range of $1,999,992 and $2,070,522 should be treated as a rough guide.

Comparable Properties (5)

3 bed 4 bath 1,786 sqft Built 1984
Raw Value $348,296
Adjusted Value $2,008,580

Adjusted +$1,720,477 for 5,688 sqft more living space and -$60,193 for no garage. Net adjustment: +$1,660,284.

3 bed 2 bath 1,860 sqft Built 1985
Raw Value $308,133
Adjusted Value $1,999,992

Adjusted +$1,698,094 for 5,614 sqft more living space and -$6,235 for no pool. Net adjustment: +$1,691,859.

3 bed 2 bath 1,491 sqft Built 1984
Raw Value $321,008
Adjusted Value $2,070,522

Adjusted +$1,809,707 for 5,983 sqft more living space and -$60,193 for no garage. Net adjustment: +$1,749,514.

3 bed 2 bath 1,456 sqft Built 1984
Raw Value $301,492
Adjusted Value $2,061,593

Adjusted +$1,820,294 for 6,018 sqft more living space and -$60,193 for no garage. Net adjustment: +$1,760,101.

3 bed 2 bath 1,519 sqft Built 1985
Raw Value $287,745
Adjusted Value $2,028,790

Adjusted +$1,801,238 for 5,955 sqft more living space and -$60,193 for no garage. Net adjustment: +$1,741,045.

The Neighborhood

This home is valued 364.8% above the R20PS - Small Office(<10,000 Sf)-e Round Rock median of $1,404,458. With 10 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 0.2% over the past year.

R20PS - Small Office(<10,000 Sf)-e Round Rock

outlier high
10 Properties
$1,404,458 Median Value
-0.2% YoY Change
0% Have Pool
0% Have Garage
This Home
$6,528,093
Median
$1,404,458

This home is +364.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $99,696 across all districts. With a homestead exemption claimed, that drops to $97,240 — saving $2,456 per year. That's $8,103 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%$58,302
Williamson CountyCounty0.3694%$24,118
Austin Community Collegespecial0.1034%$6,750
Williamson County ESD #9 - Round RockESD0.0999%$6,522
Williamson County FM/RdCounty0.0443%$2,894
Upper Brushy Creek WCIDWater0.0170%$1,110
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$99,696

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $2,028,790 would pay approximately $12,664 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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