3504 SHELLCASTLE LN, ROUND ROCK, TX 78681
ROUND ROCK, 78681 — williamson County
Property at a Glance
This home is estimated between $349,466 and $611,614, with a best estimate of $433,043. That places the property below the L498506D - VILLAGE AT MAYFIELD median of $510,992, in a neighborhood that declined 5.8% over the past year.
Estimated Value Range
$433,043
$414,264
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 $349,466 and $611,614. All 5 comparables are in the same subdivision, giving this estimate high confidence.
Comparable Properties (5)
Adjusted +$35,406 for 127 sqft more living space. Net adjustment: +$35,406.
Adjusted -$121,831 for 437 sqft less living space and +$271 for being newer. Net adjustment: -$121,560.
Adjusted -$6,412 for 23 sqft less living space and -$271 for being older. Net adjustment: -$6,683.
Adjusted -$35,685 for 128 sqft less living space. Net adjustment: -$35,685.
Adjusted -$119,879 for 430 sqft less living space. Net adjustment: -$119,879.
The Neighborhood
This home is valued 18.9% below the L498506D - VILLAGE AT MAYFIELD median of $510,992. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 5.8% over the past year.
L498506D - VILLAGE AT MAYFIELD
below averageThis home is -18.9% below the subdivision median.
Tax Analysis
The estimated annual property tax is $7,454 across all districts. With a homestead exemption claimed, that drops to $6,127 — saving $1,327 per year. That's $511 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
| District | Type | Rate | Annual Amount |
|---|---|---|---|
| Round Rock ISD | School | 0.8931% | $3,700 |
| Round Rock | City | 0.3720% | $1,541 |
| Williamson County | County | 0.3694% | $1,530 |
| Austin Community College | special | 0.1034% | $428 |
| Williamson County FM/Rd | County | 0.0443% | $184 |
| Upper Brushy Creek WCID | Water | 0.0170% | $70 |
| Williamson Central Appraisal District | cad | 0.0000% | $0 |
| Total Annual Tax | 1.7993% | $7,454 | |
Mortgage Context
At today's 30-year mortgage rate of 6.38%, a buyer financing $433,043 would pay approximately $2,703 per month (principal and interest only, excluding taxes and insurance).