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3709 CASTLE ROCK DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath1,143 sqftBuilt 2002

Property at a Glance

This home is estimated between $135,880 and $499,146, with a best estimate of $263,319. 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

$135,880 $499,146
Best Estimate
$263,319
WCAD Value
$372,528
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 $135,880 and $499,146 should be treated as a rough guide.

Comparable Properties (5)

4 bed 2 bath 1,186 sqft Built 1994
Raw Value $407,186
Adjusted Value $387,226

Adjusted -$8,754 for 43 sqft less living space and -$11,206 for being older. Net adjustment: -$19,960.

3 bed 2 bath 940 sqft Built 2002
Raw Value $457,821
Adjusted Value $499,146

Adjusted +$41,325 for 203 sqft more living space. Net adjustment: +$41,325.

3 bed 1,232 sqft Built 2011
Raw Value $141,391
Adjusted Value $135,880

Adjusted -$18,118 for 89 sqft less living space and +$12,607 for being newer. Net adjustment: -$5,511.

3 bed 2 bath 1,133 sqft Built 1979
Raw Value $293,501
Adjusted Value $263,319

Adjusted +$2,036 for 10 sqft more living space and -$32,218 for being older. Net adjustment: -$30,182.

3 bed 2 bath 1,212 sqft Built 1982
Raw Value $268,403
Adjusted Value $226,340

Adjusted -$14,047 for 69 sqft less living space and -$28,016 for being older. Net adjustment: -$42,063.

The Neighborhood

This home is valued 1.2% 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
$372,528
Median
$368,194

This home is +1.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,703 across all districts. With a homestead exemption claimed, that drops to $5,384 — saving $1,319 per year. That's $449 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%$3,327
Round RockCity0.3720%$1,386
Williamson CountyCounty0.3694%$1,376
Austin Community Collegespecial0.1034%$385
Williamson County FM/RdCounty0.0443%$165
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,703

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $263,319 would pay approximately $1,644 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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