510/512 SIERRA CV, ROUND ROCK, TX 78664
ROUND ROCK, 78664 — williamson County
Property at a Glance
This home is estimated between $321,646 and $368,153, with a best estimate of $345,401. That places the property below the R450X - Round Rock East - Duplex median of $355,449, in a neighborhood that declined 8.7% over the past year.
Estimated Value Range
$345,401
$339,475
Based on 5 comparable properties(5 in the same subdivision)
Based on 5 comparable properties in R450X - Round Rock East - Duplex, this home's estimated market value is between $321,646 and $368,153. All 5 comparables are in the same subdivision, giving this estimate high confidence.
Comparable Properties (5)
Adjusted -$1,166 for 6 sqft less living space. Net adjustment: -$1,166.
Adjusted +$8,744 for 45 sqft more living space. Net adjustment: +$8,744.
Adjusted +$8,355 for 43 sqft more living space. Net adjustment: +$8,355.
Adjusted -$55,768 for 287 sqft less living space and -$1,000 for being older. Net adjustment: -$56,768.
Adjusted -$59,460 for 306 sqft less living space and -$11,002 for being older. Net adjustment: -$70,462.
The Neighborhood
This home is valued 4.5% below the R450X - Round Rock East - Duplex median of $355,449. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 8.7% over the past year.
R450X - Round Rock East - Duplex
typicalThis home is -4.5% below the subdivision median.
Tax Analysis
The estimated annual property tax is $6,108 across all districts. With a homestead exemption claimed, that drops to $4,795 — saving $1,313 per year. That's $400 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% | $3,032 |
| Round Rock | City | 0.3720% | $1,263 |
| Williamson County | County | 0.3694% | $1,254 |
| Austin Community College | special | 0.1034% | $351 |
| Williamson County FM/Rd | County | 0.0443% | $150 |
| Upper Brushy Creek WCID | Water | 0.0170% | $58 |
| Williamson Central Appraisal District | cad | 0.0000% | $0 |
| Total Annual Tax | 1.7993% | $6,108 | |
Mortgage Context
At today's 30-year mortgage rate of 6.38%, a buyer financing $345,401 would pay approximately $2,156 per month (principal and interest only, excluding taxes and insurance).