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

3616 SANDY BROOK DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,482 sqftBuilt 2009

Property at a Glance

This home is estimated between $248,924 and $426,161, with a best estimate of $255,023. That places the property below the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056, in a neighborhood that declined 4.7% over the past year.

Estimated Value Range

$248,924 $426,161
Best Estimate
$255,023
WCAD Value
$288,083
High Confidence

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

Based on 5 comparable properties in R409599G - STONEY BROOK - ALL SECTIONS, this home's estimated market value is between $248,924 and $426,161. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3620 SANDY BROOK DR, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,717 sqft Built 2007
Raw Value $315,636
Adjusted Value $253,000

Adjusted -$54,413 for 235 sqft less living space and -$8,223 for being older. Net adjustment: -$62,636.

3612 SANDY BROOK DR, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,730 sqft Built 2008
Raw Value $316,557
Adjusted Value $255,023

Adjusted -$57,423 for 248 sqft less living space and -$4,111 for being older. Net adjustment: -$61,534.

3608 SANDY BROOK DR, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,571 sqft Built 2006
Raw Value $281,866
Adjusted Value $248,924

Adjusted -$20,608 for 89 sqft less living space and -$12,334 for being older. Net adjustment: -$32,942.

1531 HAYNIE BND, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 3 bath 1,240 sqft Built 2008
Raw Value $374,238
Adjusted Value $426,161

Adjusted +$56,034 for 242 sqft more living space and -$4,111 for being older. Net adjustment: +$51,923.

3624 SANDY BROOK DR, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,611 sqft Built 2007
Raw Value $408,657
Adjusted Value $370,565

Adjusted -$29,869 for 129 sqft less living space and -$8,223 for being older. Net adjustment: -$38,092.

The Neighborhood

This home is valued 12.2% below the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 4.7% over the past year.

R409599G - STONEY BROOK - ALL SECTIONS

typical
197 Properties
$328,056 Median Value
-4.7% YoY Change
0% Have Pool
100% Have Garage
This Home
$288,083
Median
$328,056

This home is -12.2% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,183 across all districts. With a homestead exemption claimed, that drops to $3,880 — saving $1,303 per year. That's $323 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%$2,573
Round RockCity0.3720%$1,072
Williamson CountyCounty0.3694%$1,064
Austin Community Collegespecial0.1034%$298
Williamson County FM/RdCounty0.0443%$128
Upper Brushy Creek WCIDWater0.0170%$49
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,183

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $255,023 would pay approximately $1,592 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.

View full property details