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3603 CARNOUSTY CV, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed3 bath2,372 sqftBuilt 2002

Property at a Glance

This home is estimated between $586,750 and $850,561, with a best estimate of $789,846. 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

$586,750 $850,561
Best Estimate
$789,846
WCAD Value
$793,665
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 $586,750 and $850,561. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3120 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,162 sqft Built 2003
Raw Value $726,778
Adjusted Value $801,708

Adjusted +$73,468 for 210 sqft more living space and +$1,462 for being newer. Net adjustment: +$74,930.

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 $850,561

Adjusted -$53,877 for 154 sqft less living space and -$1,462 for being older. Net adjustment: -$55,339.

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 $586,750

Adjusted -$342,153 for 978 sqft less living space and +$4,387 for being newer. Net adjustment: -$337,766.

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 $789,846

Adjusted -$50,029 for 143 sqft less living space and -$1,462 for being older. Net adjustment: -$51,491.

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 $694,101

Adjusted -$184,371 for 527 sqft less living space and +$4,387 for being newer. Net adjustment: -$179,984.

The Neighborhood

This home is valued 12.9% 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
$793,665
Median
$910,927

This home is -12.9% below the subdivision median.

Tax Analysis

The estimated annual property tax is $14,280 across all districts. With a homestead exemption claimed, that drops to $12,883 — saving $1,397 per year. That's $1,074 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%$7,088
Round RockCity0.3720%$2,952
Williamson CountyCounty0.3694%$2,932
Austin Community Collegespecial0.1034%$821
Williamson County FM/RdCounty0.0443%$352
Upper Brushy Creek WCIDWater0.0170%$135
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$14,280

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $789,846 would pay approximately $4,930 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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