Beta Williamson County, TX only — data and coverage are limited during early access.

300 W DOUCET CV, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath2,086 sqftBuilt 2018

Property at a Glance

This home is estimated between $331,768 and $496,320, with a best estimate of $422,157. That places the property above the H121413C - SIENA median of $406,354, in a neighborhood that declined 5.4% over the past year.

Estimated Value Range

$331,768 $496,320
Best Estimate
$422,157
WCAD Value
$393,084
High Confidence

Based on 5 comparable properties(5 in the same subdivision)

Based on 5 comparable properties in H121413C - SIENA, this home's estimated market value is between $331,768 and $496,320. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

304 W DOUCET CV, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,824 sqft Built 2018
Raw Value $440,931
Adjusted Value $496,320

Adjusted +$55,389 for 262 sqft more living space. Net adjustment: +$55,389.

5613 SACCO ST, ROUND ROCK, TX 78665
0.12 mi 100% similar Same subdivision
3 bed 2 bath 2,412 sqft Built 2018
Raw Value $400,687
Adjusted Value $331,768

Adjusted -$68,919 for 326 sqft less living space. Net adjustment: -$68,919.

5636 SAMBUCO ST, ROUND ROCK, TX 78665
0.12 mi 100% similar Same subdivision
3 bed 2 bath 2,188 sqft Built 2018
Raw Value $399,359
Adjusted Value $377,795

Adjusted -$21,564 for 102 sqft less living space. Net adjustment: -$21,564.

5625 SACCO ST, ROUND ROCK, TX 78665
0.12 mi 100% similar Same subdivision
3 bed 2 bath 1,835 sqft Built 2018
Raw Value $369,093
Adjusted Value $422,157

Adjusted +$53,064 for 251 sqft more living space. Net adjustment: +$53,064.

5628 SAMBUCO ST, ROUND ROCK, TX 78665
0.12 mi 100% similar Same subdivision
3 bed 2 bath 1,958 sqft Built 2019
Raw Value $467,661
Adjusted Value $492,492

Adjusted +$27,060 for 128 sqft more living space and -$2,229 for being older. Net adjustment: +$24,831.

The Neighborhood

This home is valued 3.3% below the H121413C - SIENA median of $406,354. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 5.4% over the past year.

H121413C - SIENA

typical
1,611 Properties
$406,354 Median Value
-5.4% YoY Change
1% Have Pool
100% Have Garage
This Home
$393,084
Median
$406,354

This home is -3.3% below the subdivision median.

Tax Analysis

The estimated annual property tax is $9,048 across all districts. With a homestead exemption claimed, that drops to $7,288 — saving $1,760 per year. That's $607 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
Hutto ISDSchool1.2052%$4,737
Siena MUD #1MUD0.5250%$2,064
Williamson CountyCounty0.3694%$1,452
Williamson County ESD #3 - HuttoESD0.1000%$393
Williamson County FM/RdCounty0.0443%$174
EWC Higher Ed Centerspecial0.0409%$161
Upper Brushy Creek WCIDWater0.0170%$67
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$9,048

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $422,157 would pay approximately $2,635 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 4/17/2026.

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