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1517 TONIA LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,596 sqftBuilt 2006

Property at a Glance

This home is estimated between $244,414 and $419,369, with a best estimate of $309,398. 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

$244,414 $419,369
Best Estimate
$309,398
WCAD Value
$288,660
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $244,414 and $419,369. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3 bed 2 bath 1,831 sqft Built 2006
Raw Value $363,811
Adjusted Value $309,398

Adjusted -$54,413 for 235 sqft less living space. Net adjustment: -$54,413.

1521 TONIA LOOP, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,868 sqft Built 2006
Raw Value $332,591
Adjusted Value $269,610

Adjusted -$62,981 for 272 sqft less living space. Net adjustment: -$62,981.

1511 TONIA LOOP, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,624 sqft Built 2006
Raw Value $425,852
Adjusted Value $419,369

Adjusted -$6,483 for 28 sqft less living space. Net adjustment: -$6,483.

1525 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,961 sqft Built 2006
Raw Value $328,928
Adjusted Value $244,414

Adjusted -$84,514 for 365 sqft less living space. Net adjustment: -$84,514.

1529 TONIA LOOP, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,388 sqft Built 2006
Raw Value $324,624
Adjusted Value $372,786

Adjusted +$48,162 for 208 sqft more living space. Net adjustment: +$48,162.

The Neighborhood

This home is valued 12.0% below the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056. That positions it competitively for buyers comparing within the neighborhood. 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
$288,660
Median
$328,056

This home is -12.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,194 across all districts. With a homestead exemption claimed, that drops to $3,890 — saving $1,304 per year. That's $324 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%$2,578
Round RockCity0.3720%$1,074
Williamson CountyCounty0.3694%$1,066
Austin Community Collegespecial0.1034%$298
Williamson County FM/RdCounty0.0443%$128
Upper Brushy Creek WCIDWater0.0170%$49
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,194

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $309,398 would pay approximately $1,931 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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