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3118 CARNOUSTY ST, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

5 bed4 bath2,438 sqftBuilt 2014

Property at a Glance

This home is estimated between $795,388 and $1,056,933, with a best estimate of $837,205. That places the property below the R549699C - Forest Creek Sec 14,20,21,26-30,33,34 median of $910,927, in a neighborhood that declined 3.1% over the past year.

Estimated Value Range

$795,388 $1,056,933
Best Estimate
$837,205
WCAD Value
$917,104
High Confidence

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

Based on 5 comparable properties in R549699C - Forest Creek Sec 14,20,21,26-30,33,34, this home's estimated market value is between $795,388 and $1,056,933. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3605 CARNOUSTY CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,526 sqft Built 2001
Raw Value $905,900
Adjusted Value $856,102

Adjusted -$30,787 for 88 sqft less living space and -$19,011 for being older. Net adjustment: -$49,798.

3115 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 5 bath 3,145 sqft Built 2004
Raw Value $1,099,173
Adjusted Value $837,205

Adjusted -$247,344 for 707 sqft less living space and -$14,624 for being older. Net adjustment: -$261,968.

3104 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,515 sqft Built 2001
Raw Value $841,337
Adjusted Value $795,388

Adjusted -$26,938 for 77 sqft less living space and -$19,011 for being older. Net adjustment: -$45,949.

3107 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 4 bath 1,879 sqft Built 2001
Raw Value $880,378
Adjusted Value $1,056,933

Adjusted +$195,566 for 559 sqft more living space and -$19,011 for being older. Net adjustment: +$176,555.

3619 CARNOUSTY CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,648 sqft Built 2015
Raw Value $881,822
Adjusted Value $809,816

Adjusted -$73,468 for 210 sqft less living space and +$1,462 for being newer. Net adjustment: -$72,006.

The Neighborhood

This home is in line with the R549699C - Forest Creek Sec 14,20,21,26-30,33,34 median of $910,927. Note that values in this subdivision declined 3.1% over the past year.

R549699C - Forest Creek Sec 14,20,21,26-30,33,34

typical
271 Properties
$910,927 Median Value
-3.1% YoY Change
1% Have Pool
99% Have Garage
This Home
$917,104
Median
$910,927

This home is +0.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $16,501 across all districts. With a homestead exemption claimed, that drops to $15,081 — saving $1,420 per year. That's $1,257 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%$8,191
Round RockCity0.3720%$3,412
Williamson CountyCounty0.3694%$3,388
Austin Community Collegespecial0.1034%$948
Williamson County FM/RdCounty0.0443%$407
Upper Brushy Creek WCIDWater0.0170%$156
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$16,501

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $837,205 would pay approximately $5,226 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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