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3755 CASTLE ROCK DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,667 sqftBuilt 2003

Property at a Glance

This home is estimated between $355,106 and $392,169, with a best estimate of $370,514. 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

$355,106 $392,169
Best Estimate
$370,514
WCAD Value
$339,333
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 $355,106 and $392,169 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,584 sqft Built 1995
Raw Value $381,657
Adjusted Value $387,348

Adjusted +$16,897 for 83 sqft more living space and -$11,206 for being older. Net adjustment: +$5,691.

3 bed 2 bath 1,585 sqft Built 1997
Raw Value $383,881
Adjusted Value $392,169

Adjusted +$16,693 for 82 sqft more living space and -$8,405 for being older. Net adjustment: +$8,288.

3 bed 2 bath 1,675 sqft Built 1995
Raw Value $367,941
Adjusted Value $355,106

Adjusted -$1,629 for 8 sqft less living space and -$11,206 for being older. Net adjustment: -$12,835.

3 bed 2 bath 1,550 sqft Built 1984
Raw Value $366,931
Adjusted Value $364,134

Adjusted +$23,818 for 117 sqft more living space and -$26,615 for being older. Net adjustment: -$2,797.

3 bed 2 bath 1,626 sqft Built 1977
Raw Value $398,588
Adjusted Value $370,514

Adjusted +$8,346 for 41 sqft more living space and -$36,420 for being older. Net adjustment: -$28,074.

The Neighborhood

This home is valued 7.8% 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
$339,333
Median
$368,194

This home is -7.8% below the subdivision median.

Tax Analysis

The estimated annual property tax is $6,106 across all districts. With a homestead exemption claimed, that drops to $4,793 — saving $1,313 per year. That's $399 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%$3,031
Round RockCity0.3720%$1,262
Williamson CountyCounty0.3694%$1,254
Austin Community Collegespecial0.1034%$351
Williamson County FM/RdCounty0.0443%$150
Upper Brushy Creek WCIDWater0.0170%$58
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,106

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $370,514 would pay approximately $2,313 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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