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3604 SANDY BROOK DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,050 sqftBuilt 2006

Property at a Glance

This home is estimated between $161,230 and $346,708, with a best estimate of $200,389. 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

$161,230 $346,708
Best Estimate
$200,389
WCAD Value
$358,703
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 $161,230 and $346,708. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3608 SANDY BROOK DR, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,571 sqft Built 2006
Raw Value $281,866
Adjusted Value $161,230

Adjusted -$120,636 for 521 sqft less living space. Net adjustment: -$120,636.

3612 SANDY BROOK DR, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,730 sqft Built 2008
Raw Value $316,557
Adjusted Value $167,329

Adjusted -$157,451 for 680 sqft less living space and +$8,223 for being newer. Net adjustment: -$149,228.

1523 HAYNIE BND, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,260 sqft Built 2009
Raw Value $382,999
Adjusted Value $346,708

Adjusted -$48,625 for 210 sqft less living space and +$12,334 for being newer. Net adjustment: -$36,291.

3616 SANDY BROOK DR, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,482 sqft Built 2009
Raw Value $288,083
Adjusted Value $200,389

Adjusted -$100,028 for 432 sqft less living space and +$12,334 for being newer. Net adjustment: -$87,694.

1531 HAYNIE BND, ROUND ROCK, TX 78665
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,240 sqft Built 2008
Raw Value $374,238
Adjusted Value $338,467

Adjusted -$43,994 for 190 sqft less living space and +$8,223 for being newer. Net adjustment: -$35,771.

The Neighborhood

This home is valued 9.3% above the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056. With 197 homes in the subdivision, the property sits in the upper tier. 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
$358,703
Median
$328,056

This home is +9.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,454 across all districts. With a homestead exemption claimed, that drops to $5,137 — saving $1,317 per year. That's $428 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%$3,204
Round RockCity0.3720%$1,334
Williamson CountyCounty0.3694%$1,325
Austin Community Collegespecial0.1034%$371
Williamson County FM/RdCounty0.0443%$159
Upper Brushy Creek WCIDWater0.0170%$61
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,454

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $200,389 would pay approximately $1,251 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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