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3102 CARNOUSTY ST, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed3 bath2,760 sqftBuilt 2000

Property at a Glance

This home is estimated between $725,417 and $989,227, with a best estimate of $940,375. 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

$725,417 $989,227
Best Estimate
$940,375
WCAD Value
$1,018,672
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 $725,417 and $989,227. 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 $940,375

Adjusted +$209,210 for 598 sqft more living space and +$4,387 for being newer. Net adjustment: +$213,597.

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 $989,227

Adjusted +$81,865 for 234 sqft more living space and +$1,462 for being newer. Net adjustment: +$83,327.

3108 CARNOUSTY ST, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,748 sqft Built 2013
Raw Value $832,689
Adjusted Value $855,898

Adjusted +$4,198 for 12 sqft more living space and +$19,011 for being newer. Net adjustment: +$23,209.

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 $970,331

Adjusted -$134,692 for 385 sqft less living space and +$5,850 for being newer. Net adjustment: -$128,842.

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 $725,417

Adjusted -$206,411 for 590 sqft less living space and +$7,312 for being newer. Net adjustment: -$199,099.

The Neighborhood

This home is valued 11.8% above the R549699C - Forest Creek Sec 14,20,21,26-30,33,34 median of $910,927. With 271 homes in the subdivision, the property sits in the upper tier. 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
$1,018,672
Median
$910,927

This home is +11.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $17,916 across all districts. With a homestead exemption claimed, that drops to $16,482 — saving $1,434 per year. That's $1,374 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%$8,893
Round RockCity0.3720%$3,704
Williamson CountyCounty0.3694%$3,679
Austin Community Collegespecial0.1034%$1,030
Williamson County FM/RdCounty0.0443%$441
Upper Brushy Creek WCIDWater0.0170%$169
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$17,916

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $940,375 would pay approximately $5,870 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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