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3618 CARNOUSTY CV, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed3 bath2,533 sqftBuilt 2017

Property at a Glance

This home is estimated between $621,140 and $884,951, with a best estimate of $751,621. 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

$621,140 $884,951
Best Estimate
$751,621
WCAD Value
$861,829
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 $621,140 and $884,951. 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 $884,951

Adjusted +$2,449 for 7 sqft more living space and -$23,398 for being older. Net adjustment: -$20,949.

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 $751,621

Adjusted -$75,218 for 215 sqft less living space and -$5,850 for being older. Net adjustment: -$81,068.

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 $621,140

Adjusted -$285,827 for 817 sqft less living space and -$17,549 for being older. Net adjustment: -$303,376.

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 $824,236

Adjusted +$6,297 for 18 sqft more living space and -$23,398 for being older. Net adjustment: -$17,101.

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 $728,491

Adjusted -$128,045 for 366 sqft less living space and -$17,549 for being older. Net adjustment: -$145,594.

The Neighborhood

This home is valued 5.4% 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
$861,829
Median
$910,927

This home is -5.4% below the subdivision median.

Tax Analysis

The estimated annual property tax is $15,507 across all districts. With a homestead exemption claimed, that drops to $14,097 — saving $1,410 per year. That's $1,175 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%$7,697
Round RockCity0.3720%$3,206
Williamson CountyCounty0.3694%$3,184
Austin Community Collegespecial0.1034%$891
Williamson County FM/RdCounty0.0443%$382
Upper Brushy Creek WCIDWater0.0170%$147
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$15,507

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $751,621 would pay approximately $4,692 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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