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3501 SHELLCASTLE LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath2,333 sqftBuilt 2007

Property at a Glance

This home is estimated between $469,345 and $731,493, with a best estimate of $534,143. That places the property above the L498506D - VILLAGE AT MAYFIELD median of $510,992, in a neighborhood that declined 5.8% over the past year.

Estimated Value Range

$469,345 $731,493
Best Estimate
$534,143
WCAD Value
$552,922
High Confidence

Based on 5 comparable properties(5 in the same subdivision)

Based on 5 comparable properties in L498506D - VILLAGE AT MAYFIELD, this home's estimated market value is between $469,345 and $731,493. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3504 SHELLCASTLE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,903 sqft Built 2007
Raw Value $414,264
Adjusted Value $534,143

Adjusted +$119,879 for 430 sqft more living space. Net adjustment: +$119,879.

3513 SHELLCASTLE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,776 sqft Built 2007
Raw Value $576,208
Adjusted Value $731,493

Adjusted +$155,285 for 557 sqft more living space. Net adjustment: +$155,285.

3525 SHELLCASTLE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,340 sqft Built 2006
Raw Value $471,026
Adjusted Value $469,345

Adjusted -$1,952 for 7 sqft less living space and +$271 for being newer. Net adjustment: -$1,681.

3532 SHELLCASTLE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,926 sqft Built 2008
Raw Value $440,692
Adjusted Value $553,888

Adjusted +$113,467 for 407 sqft more living space and -$271 for being older. Net adjustment: +$113,196.

3505 SHELLCASTLE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,031 sqft Built 2007
Raw Value $416,314
Adjusted Value $500,508

Adjusted +$84,194 for 302 sqft more living space. Net adjustment: +$84,194.

The Neighborhood

This home is valued 8.2% above the L498506D - VILLAGE AT MAYFIELD median of $510,992. With 696 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 5.8% over the past year.

L498506D - VILLAGE AT MAYFIELD

typical
696 Properties
$510,992 Median Value
-5.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$552,922
Median
$510,992

This home is +8.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $9,949 across all districts. With a homestead exemption claimed, that drops to $8,596 — saving $1,353 per year. That's $716 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%$4,938
Round RockCity0.3720%$2,057
Williamson CountyCounty0.3694%$2,043
Austin Community Collegespecial0.1034%$572
Williamson County FM/RdCounty0.0443%$245
Upper Brushy Creek WCIDWater0.0170%$94
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$9,949

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $534,143 would pay approximately $3,334 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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