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3854 CASTLE ROCK CV, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath1,140 sqftBuilt 2005

Property at a Glance

This home is estimated between $226,870 and $392,875, with a best estimate of $272,767. 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

$226,870 $392,875
Best Estimate
$272,767
WCAD Value
$376,583
High Confidence

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

Based on 5 comparable properties in R107503F - PRESERVE AT STONE OAK - PH 3 & 4, this home's estimated market value is between $226,870 and $392,875. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3853 CASTLE ROCK CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,045 sqft Built 2005
Raw Value $373,536
Adjusted Value $392,875

Adjusted +$19,339 for 95 sqft more living space. Net adjustment: +$19,339.

3805 CASTLE ROCK CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,423 sqft Built 2005
Raw Value $330,378
Adjusted Value $272,767

Adjusted -$57,611 for 283 sqft less living space. Net adjustment: -$57,611.

3846 CASTLE ROCK CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,671 sqft Built 2005
Raw Value $334,967
Adjusted Value $226,870

Adjusted -$108,097 for 531 sqft less living space. Net adjustment: -$108,097.

3830 CASTLE ROCK CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,105 sqft Built 2005
Raw Value $370,509
Adjusted Value $377,634

Adjusted +$7,125 for 35 sqft more living space. Net adjustment: +$7,125.

3838 CASTLE ROCK CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,606 sqft Built 2005
Raw Value $326,773
Adjusted Value $231,908

Adjusted -$94,865 for 466 sqft less living space. Net adjustment: -$94,865.

The Neighborhood

This home is valued 2.3% 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
$376,583
Median
$368,194

This home is +2.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,776 across all districts. With a homestead exemption claimed, that drops to $5,456 — saving $1,320 per year. That's $455 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%$3,363
Round RockCity0.3720%$1,401
Williamson CountyCounty0.3694%$1,391
Austin Community Collegespecial0.1034%$389
Williamson County FM/RdCounty0.0443%$167
Upper Brushy Creek WCIDWater0.0170%$64
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,776

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $272,767 would pay approximately $1,703 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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