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3749 CASTLE ROCK DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath855 sqftBuilt 2003

Property at a Glance

This home is estimated between $75,850 and $439,116, with a best estimate of $226,868. 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

$75,850 $439,116
Best Estimate
$226,868
WCAD Value
$379,037
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 $75,850 and $439,116 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 940 sqft Built 2002
Raw Value $457,821
Adjusted Value $439,116

Adjusted -$17,304 for 85 sqft less living space and -$1,401 for being older. Net adjustment: -$18,705.

3 bed 1,232 sqft Built 2011
Raw Value $141,391
Adjusted Value $75,850

Adjusted -$76,747 for 377 sqft less living space and +$11,206 for being newer. Net adjustment: -$65,541.

4 bed 2 bath 1,186 sqft Built 1994
Raw Value $407,186
Adjusted Value $327,196

Adjusted -$67,383 for 331 sqft less living space and -$12,607 for being older. Net adjustment: -$79,990.

3 bed 2 bath 1,133 sqft Built 1979
Raw Value $293,501
Adjusted Value $203,289

Adjusted -$56,593 for 278 sqft less living space and -$33,619 for being older. Net adjustment: -$90,212.

3 bed 2 bath 1,585 sqft Built 1997
Raw Value $383,881
Adjusted Value $226,868

Adjusted -$148,608 for 730 sqft less living space and -$8,405 for being older. Net adjustment: -$157,013.

The Neighborhood

This home is valued 2.9% 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
$379,037
Median
$368,194

This home is +2.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,820 across all districts. With a homestead exemption claimed, that drops to $5,500 — saving $1,320 per year. That's $458 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%$3,385
Round RockCity0.3720%$1,410
Williamson CountyCounty0.3694%$1,400
Austin Community Collegespecial0.1034%$392
Williamson County FM/RdCounty0.0443%$168
Upper Brushy Creek WCIDWater0.0170%$64
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,820

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $226,868 would pay approximately $1,416 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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