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3722 CASTLE ROCK DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath1,609 sqftBuilt 2003

Property at a Glance

This home is estimated between $343,299 and $514,692, with a best estimate of $375,540. 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

$343,299 $514,692
Best Estimate
$375,540
WCAD Value
$303,900
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 $343,299 and $514,692 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,585 sqft Built 1997
Raw Value $383,881
Adjusted Value $380,362

Adjusted +$4,886 for 24 sqft more living space and -$8,405 for being older. Net adjustment: -$3,519.

3 bed 2 bath 1,584 sqft Built 1995
Raw Value $381,657
Adjusted Value $375,540

Adjusted +$5,089 for 25 sqft more living space and -$11,206 for being older. Net adjustment: -$6,117.

3 bed 2 bath 1,675 sqft Built 1995
Raw Value $367,941
Adjusted Value $343,299

Adjusted -$13,436 for 66 sqft less living space and -$11,206 for being older. Net adjustment: -$24,642.

4 bed 2 bath 1,657 sqft Built 1978
Raw Value $559,484
Adjusted Value $514,692

Adjusted -$9,772 for 48 sqft less living space and -$35,020 for being older. Net adjustment: -$44,792.

3 bed 2 bath 1,550 sqft Built 1984
Raw Value $366,931
Adjusted Value $352,327

Adjusted +$12,011 for 59 sqft more living space and -$26,615 for being older. Net adjustment: -$14,604.

The Neighborhood

This home is valued 17.5% 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
$303,900
Median
$368,194

This home is -17.5% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,468 across all districts. With a homestead exemption claimed, that drops to $4,162 — saving $1,306 per year. That's $347 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%$2,714
Round RockCity0.3720%$1,131
Williamson CountyCounty0.3694%$1,123
Austin Community Collegespecial0.1034%$314
Williamson County FM/RdCounty0.0443%$135
Upper Brushy Creek WCIDWater0.0170%$52
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,468

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $375,540 would pay approximately $2,344 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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