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3704 CASTLE ROCK DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath920 sqftBuilt 2002

Property at a Glance

This home is estimated between $90,483 and $453,750, with a best estimate of $217,922. That places the property below the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194, in a neighborhood that declined 10.9% over the past year.

Estimated Value Range

$90,483 $453,750
Best Estimate
$217,922
WCAD Value
$374,238
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R107503F - PRESERVE AT STONE OAK - PH 3 & 4. The estimated range of $90,483 and $453,750 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 940 sqft Built 2002
Raw Value $457,821
Adjusted Value $453,750

Adjusted -$4,071 for 20 sqft less living space. Net adjustment: -$4,071.

3 bed 1,232 sqft Built 2011
Raw Value $141,391
Adjusted Value $90,483

Adjusted -$63,515 for 312 sqft less living space and +$12,607 for being newer. Net adjustment: -$50,908.

4 bed 2 bath 1,186 sqft Built 1994
Raw Value $407,186
Adjusted Value $341,830

Adjusted -$54,150 for 266 sqft less living space and -$11,206 for being older. Net adjustment: -$65,356.

3 bed 2 bath 1,133 sqft Built 1979
Raw Value $293,501
Adjusted Value $217,922

Adjusted -$43,361 for 213 sqft less living space and -$32,218 for being older. Net adjustment: -$75,579.

3 bed 2 bath 1,212 sqft Built 1982
Raw Value $268,403
Adjusted Value $180,944

Adjusted -$59,443 for 292 sqft less living space and -$28,016 for being older. Net adjustment: -$87,459.

The Neighborhood

This home is valued 1.6% above the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194. With 1,045 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 10.9% over the past year.

R107503F - PRESERVE AT STONE OAK - PH 3 & 4

typical
1,045 Properties
$368,194 Median Value
-10.9% YoY Change
1% Have Pool
99% Have Garage
This Home
$374,238
Median
$368,194

This home is +1.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,734 across all districts. With a homestead exemption claimed, that drops to $5,414 — saving $1,320 per year. That's $451 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%$3,342
Round RockCity0.3720%$1,392
Williamson CountyCounty0.3694%$1,383
Austin Community Collegespecial0.1034%$387
Williamson County FM/RdCounty0.0443%$166
Upper Brushy Creek WCIDWater0.0170%$64
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,734

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $217,922 would pay approximately $1,360 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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