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3753 CASTLE ROCK DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,506 sqftBuilt 2003

Property at a Glance

This home is estimated between $208,376 and $359,394, with a best estimate of $331,359. 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

$208,376 $359,394
Best Estimate
$331,359
WCAD Value
$294,825
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 $208,376 and $359,394 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 $354,572

Adjusted -$15,879 for 78 sqft less living space and -$11,206 for being older. Net adjustment: -$27,085.

3 bed 2 bath 1,585 sqft Built 1997
Raw Value $383,881
Adjusted Value $359,394

Adjusted -$16,082 for 79 sqft less living space and -$8,405 for being older. Net adjustment: -$24,487.

3 bed 2 bath 1,675 sqft Built 1995
Raw Value $367,941
Adjusted Value $322,331

Adjusted -$34,404 for 169 sqft less living space and -$11,206 for being older. Net adjustment: -$45,610.

3 bed 2 bath 1,550 sqft Built 1984
Raw Value $366,931
Adjusted Value $331,359

Adjusted -$8,957 for 44 sqft less living space and -$26,615 for being older. Net adjustment: -$35,572.

3 bed 1,232 sqft Built 2011
Raw Value $141,391
Adjusted Value $208,376

Adjusted +$55,779 for 274 sqft more living space and +$11,206 for being newer. Net adjustment: +$66,985.

The Neighborhood

This home is valued 19.9% 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

below average
1,045 Properties
$368,194 Median Value
-10.9% YoY Change
1% Have Pool
99% Have Garage
This Home
$294,825
Median
$368,194

This home is -19.9% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,305 across all districts. With a homestead exemption claimed, that drops to $4,000 — saving $1,305 per year. That's $333 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%$2,633
Round RockCity0.3720%$1,097
Williamson CountyCounty0.3694%$1,089
Austin Community Collegespecial0.1034%$305
Williamson County FM/RdCounty0.0443%$131
Upper Brushy Creek WCIDWater0.0170%$50
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,305

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $331,359 would pay approximately $2,068 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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