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3617 CARNOUSTY CV, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed3 bath2,010 sqftBuilt 2009

Property at a Glance

This home is estimated between $557,219 and $914,509, with a best estimate of $774,680. 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

$557,219 $914,509
Best Estimate
$774,680
WCAD Value
$772,735
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 $557,219 and $914,509. 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 $664,827

Adjusted -$53,177 for 152 sqft less living space and -$8,774 for being older. Net adjustment: -$61,951.

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 $557,219

Adjusted -$311,016 for 889 sqft less living space and -$5,850 for being older. Net adjustment: -$316,866.

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 $774,680

Adjusted -$149,736 for 428 sqft less living space and +$7,312 for being newer. Net adjustment: -$142,424.

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 $914,509

Adjusted +$45,830 for 131 sqft more living space and -$11,699 for being older. Net adjustment: +$34,131.

3620 CARNOUSTY CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,174 sqft Built 2015
Raw Value $833,829
Adjusted Value $785,228

Adjusted -$57,375 for 164 sqft less living space and +$8,774 for being newer. Net adjustment: -$48,601.

The Neighborhood

This home is valued 15.2% 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

below average
271 Properties
$910,927 Median Value
-3.1% YoY Change
1% Have Pool
99% Have Garage
This Home
$772,735
Median
$910,927

This home is -15.2% below the subdivision median.

Tax Analysis

The estimated annual property tax is $13,904 across all districts. With a homestead exemption claimed, that drops to $12,511 — saving $1,393 per year. That's $1,043 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%$6,901
Round RockCity0.3720%$2,875
Williamson CountyCounty0.3694%$2,855
Austin Community Collegespecial0.1034%$799
Williamson County FM/RdCounty0.0443%$343
Upper Brushy Creek WCIDWater0.0170%$131
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$13,904

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $774,680 would pay approximately $4,836 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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