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3110 CARNOUSTY ST, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed4 bath3,577 sqftBuilt 2011

Property at a Glance

This home is estimated between $866,253 and $1,240,071, with a best estimate of $1,102,509. That places the property above 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

$866,253 $1,240,071
Best Estimate
$1,102,509
WCAD Value
$856,084
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 $866,253 and $1,240,071. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

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 $1,240,071

Adjusted +$151,135 for 432 sqft more living space and -$10,237 for being older. Net adjustment: +$140,898.

3116 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 3,350 sqft Built 2005
Raw Value $924,516
Adjusted Value $995,158

Adjusted +$79,416 for 227 sqft more living space and -$8,774 for being older. Net adjustment: +$70,642.

3114 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,899 sqft Built 2005
Raw Value $874,085
Adjusted Value $1,102,509

Adjusted +$237,198 for 678 sqft more living space and -$8,774 for being older. Net adjustment: +$228,424.

3103 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 3,282 sqft Built 2013
Raw Value $760,122
Adjusted Value $866,253

Adjusted +$103,206 for 295 sqft more living space and +$2,925 for being newer. Net adjustment: +$106,131.

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 $1,212,682

Adjusted +$325,010 for 929 sqft more living space and +$5,850 for being newer. Net adjustment: +$330,860.

The Neighborhood

This home is valued 6.0% below the R549699C - Forest Creek Sec 14,20,21,26-30,33,34 median of $910,927. That positions it competitively for buyers comparing within the neighborhood. 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
$856,084
Median
$910,927

This home is -6.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $15,403 across all districts. With a homestead exemption claimed, that drops to $13,995 — saving $1,408 per year. That's $1,166 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%$7,646
Round RockCity0.3720%$3,185
Williamson CountyCounty0.3694%$3,163
Austin Community Collegespecial0.1034%$885
Williamson County FM/RdCounty0.0443%$379
Upper Brushy Creek WCIDWater0.0170%$146
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$15,403

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $1,102,509 would pay approximately $6,882 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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