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3703 CASTLE ROCK DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,759 sqftBuilt 2002

Property at a Glance

This home is estimated between $356,211 and $412,299, with a best estimate of $384,264. That places the property above 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

$356,211 $412,299
Best Estimate
$384,264
WCAD Value
$344,535
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 $356,211 and $412,299 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,675 sqft Built 1995
Raw Value $367,941
Adjusted Value $375,236

Adjusted +$17,100 for 84 sqft more living space and -$9,805 for being older. Net adjustment: +$7,295.

3 bed 2 bath 1,585 sqft Built 1997
Raw Value $383,881
Adjusted Value $412,299

Adjusted +$35,422 for 174 sqft more living space and -$7,004 for being older. Net adjustment: +$28,418.

3 bed 2 bath 1,584 sqft Built 1995
Raw Value $381,657
Adjusted Value $407,477

Adjusted +$35,625 for 175 sqft more living space and -$9,805 for being older. Net adjustment: +$25,820.

3 bed 2 bath 1,877 sqft Built 1984
Raw Value $405,447
Adjusted Value $356,211

Adjusted -$24,022 for 118 sqft less living space and -$25,214 for being older. Net adjustment: -$49,236.

3 bed 2 bath 1,550 sqft Built 1984
Raw Value $366,931
Adjusted Value $384,264

Adjusted +$42,547 for 209 sqft more living space and -$25,214 for being older. Net adjustment: +$17,333.

The Neighborhood

This home is valued 6.4% below the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194. That positions it competitively for buyers comparing within the neighborhood. 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
$344,535
Median
$368,194

This home is -6.4% below the subdivision median.

Tax Analysis

The estimated annual property tax is $6,199 across all districts. With a homestead exemption claimed, that drops to $4,885 — saving $1,314 per year. That's $407 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%$3,077
Round RockCity0.3720%$1,282
Williamson CountyCounty0.3694%$1,273
Austin Community Collegespecial0.1034%$356
Williamson County FM/RdCounty0.0443%$153
Upper Brushy Creek WCIDWater0.0170%$59
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,199

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $384,264 would pay approximately $2,399 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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