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3702 CASTLE ROCK DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,000 sqftBuilt 2002

Property at a Glance

This home is estimated between $106,769 and $470,035, with a best estimate of $234,208. 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

$106,769 $470,035
Best Estimate
$234,208
WCAD Value
$369,415
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 $106,769 and $470,035 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 940 sqft Built 2002
Raw Value $457,821
Adjusted Value $470,035

Adjusted +$12,214 for 60 sqft more living space. Net adjustment: +$12,214.

3 bed 1,232 sqft Built 2011
Raw Value $141,391
Adjusted Value $106,769

Adjusted -$47,229 for 232 sqft less living space and +$12,607 for being newer. Net adjustment: -$34,622.

4 bed 2 bath 1,186 sqft Built 1994
Raw Value $407,186
Adjusted Value $358,115

Adjusted -$37,865 for 186 sqft less living space and -$11,206 for being older. Net adjustment: -$49,071.

3 bed 2 bath 1,133 sqft Built 1979
Raw Value $293,501
Adjusted Value $234,208

Adjusted -$27,075 for 133 sqft less living space and -$32,218 for being older. Net adjustment: -$59,293.

3 bed 2 bath 1,212 sqft Built 1982
Raw Value $268,403
Adjusted Value $197,229

Adjusted -$43,158 for 212 sqft less living space and -$28,016 for being older. Net adjustment: -$71,174.

The Neighborhood

This home is in line with the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194. 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
$369,415
Median
$368,194

This home is +0.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,647 across all districts. With a homestead exemption claimed, that drops to $5,328 — saving $1,319 per year. That's $444 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%$3,299
Round RockCity0.3720%$1,374
Williamson CountyCounty0.3694%$1,365
Austin Community Collegespecial0.1034%$382
Williamson County FM/RdCounty0.0443%$164
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,647

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $234,208 would pay approximately $1,462 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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