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3620 CARNOUSTY CV, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed3 bath2,174 sqftBuilt 2015

Property at a Glance

This home is estimated between $605,820 and $823,282, with a best estimate of $715,993. 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

$605,820 $823,282
Best Estimate
$715,993
WCAD Value
$833,829
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 $605,820 and $823,282. 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 $713,427

Adjusted +$4,198 for 12 sqft more living space and -$17,549 for being older. Net adjustment: -$13,351.

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 $605,820

Adjusted -$253,641 for 725 sqft less living space and -$14,624 for being older. Net adjustment: -$268,265.

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 $823,282

Adjusted -$92,360 for 264 sqft less living space and -$1,462 for being older. Net adjustment: -$93,822.

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 $715,993

Adjusted -$165,829 for 474 sqft less living space. Net adjustment: -$165,829.

3610 CARNOUSTY CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 4 bath 2,222 sqft Built 2001
Raw Value $842,850
Adjusted Value $805,584

Adjusted -$16,793 for 48 sqft less living space and -$20,473 for being older. Net adjustment: -$37,266.

The Neighborhood

This home is valued 8.5% 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
$833,829
Median
$910,927

This home is -8.5% below the subdivision median.

Tax Analysis

The estimated annual property tax is $15,003 across all districts. With a homestead exemption claimed, that drops to $13,599 — saving $1,404 per year. That's $1,133 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%$7,447
Round RockCity0.3720%$3,102
Williamson CountyCounty0.3694%$3,081
Austin Community Collegespecial0.1034%$862
Williamson County FM/RdCounty0.0443%$370
Upper Brushy Creek WCIDWater0.0170%$142
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$15,003

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $715,993 would pay approximately $4,469 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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