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3605 CARNOUSTY CV, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

5 bed4 bath2,526 sqftBuilt 2001

Property at a Glance

This home is estimated between $749,441 and $1,106,731, with a best estimate of $887,003. 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

$749,441 $1,106,731
Best Estimate
$887,003
WCAD Value
$905,900
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 $749,441 and $1,106,731. 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 $887,003

Adjusted -$216,557 for 619 sqft less living space and +$4,387 for being newer. Net adjustment: -$212,170.

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 $845,185

Adjusted +$3,848 for 11 sqft more living space. Net adjustment: +$3,848.

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 $749,441

Adjusted -$130,494 for 373 sqft less living space and +$5,850 for being newer. Net adjustment: -$124,644.

3118 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,438 sqft Built 2014
Raw Value $917,104
Adjusted Value $966,902

Adjusted +$30,787 for 88 sqft more living space and +$19,011 for being newer. Net adjustment: +$49,798.

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 $1,106,731

Adjusted +$226,353 for 647 sqft more living space. Net adjustment: +$226,353.

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
$905,900
Median
$910,927

This home is -0.6% below the subdivision median.

Tax Analysis

The estimated annual property tax is $16,300 across all districts. With a homestead exemption claimed, that drops to $14,882 — saving $1,418 per year. That's $1,240 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%$8,091
Round RockCity0.3720%$3,370
Williamson CountyCounty0.3694%$3,347
Austin Community Collegespecial0.1034%$937
Williamson County FM/RdCounty0.0443%$402
Upper Brushy Creek WCIDWater0.0170%$154
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$16,300

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $887,003 would pay approximately $5,537 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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