Beta Williamson County, TX only — data and coverage are limited during early access.

1529 TONIA LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,388 sqftBuilt 2006

Property at a Glance

This home is estimated between $170,967 and $460,732, with a best estimate of $221,449. That places the property below the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056, in a neighborhood that declined 4.7% over the past year.

Estimated Value Range

$170,967 $460,732
Best Estimate
$221,449
WCAD Value
$324,624
High Confidence

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

Based on 5 comparable properties in R409599G - STONEY BROOK - ALL SECTIONS, this home's estimated market value is between $170,967 and $460,732. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

1525 TONIA LOOP, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,961 sqft Built 2006
Raw Value $328,928
Adjusted Value $196,252

Adjusted -$132,676 for 573 sqft less living space. Net adjustment: -$132,676.

1533 TONIA LOOP, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,966 sqft Built 2006
Raw Value $304,801
Adjusted Value $170,967

Adjusted -$133,834 for 578 sqft less living space. Net adjustment: -$133,834.

1521 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,868 sqft Built 2006
Raw Value $332,591
Adjusted Value $221,449

Adjusted -$111,142 for 480 sqft less living space. Net adjustment: -$111,142.

1517 TONIA LOOP, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,596 sqft Built 2006
Raw Value $288,660
Adjusted Value $240,498

Adjusted -$48,162 for 208 sqft less living space. Net adjustment: -$48,162.

1552 TONIA LOOP, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,280 sqft Built 2006
Raw Value $435,725
Adjusted Value $460,732

Adjusted +$25,007 for 108 sqft more living space. Net adjustment: +$25,007.

The Neighborhood

This home is in line with the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056. Note that values in this subdivision declined 4.7% over the past year.

R409599G - STONEY BROOK - ALL SECTIONS

typical
197 Properties
$328,056 Median Value
-4.7% YoY Change
0% Have Pool
100% Have Garage
This Home
$324,624
Median
$328,056

This home is -1.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,841 across all districts. With a homestead exemption claimed, that drops to $4,531 — saving $1,310 per year. That's $378 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%$2,899
Round RockCity0.3720%$1,208
Williamson CountyCounty0.3694%$1,199
Austin Community Collegespecial0.1034%$336
Williamson County FM/RdCounty0.0443%$144
Upper Brushy Creek WCIDWater0.0170%$55
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,841

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $221,449 would pay approximately $1,382 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.

View full property details