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

1544 TONIA LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath2,176 sqftBuilt 2006

Property at a Glance

This home is estimated between $268,321 and $523,798, with a best estimate of $414,623. That places the property above the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056, in a neighborhood that declined 4.7% over the past year.

Estimated Value Range

$268,321 $523,798
Best Estimate
$414,623
WCAD Value
$379,048
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 $268,321 and $523,798. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

1540 TONIA LOOP, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,520 sqft Built 2006
Raw Value $371,904
Adjusted Value $523,798

Adjusted +$151,894 for 656 sqft more living space. Net adjustment: +$151,894.

1548 TONIA LOOP, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,746 sqft Built 2006
Raw Value $315,058
Adjusted Value $414,623

Adjusted +$99,565 for 430 sqft more living space. Net adjustment: +$99,565.

1536 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,340 sqft Built 2005
Raw Value $320,032
Adjusted Value $509,494

Adjusted +$193,573 for 836 sqft more living space and -$4,111 for being older. Net adjustment: +$189,462.

3 bed 2 bath 2,407 sqft Built 2006
Raw Value $406,018
Adjusted Value $352,531

Adjusted -$53,487 for 231 sqft less living space. Net adjustment: -$53,487.

1507 LORSON LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 2,281 sqft Built 1999
Raw Value $321,412
Adjusted Value $268,321

Adjusted -$24,312 for 105 sqft less living space and -$28,779 for being older. Net adjustment: -$53,091.

The Neighborhood

This home is valued 15.5% above the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056. With 197 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.7% over the past year.

R409599G - STONEY BROOK - ALL SECTIONS

above average
197 Properties
$328,056 Median Value
-4.7% YoY Change
0% Have Pool
100% Have Garage
This Home
$379,048
Median
$328,056

This home is +15.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,820 across all districts. With a homestead exemption claimed, that drops to $5,500 — saving $1,320 per year. That's $458 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%$3,385
Round RockCity0.3720%$1,410
Williamson CountyCounty0.3694%$1,400
Austin Community Collegespecial0.1034%$392
Williamson County FM/RdCounty0.0443%$168
Upper Brushy Creek WCIDWater0.0170%$64
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,820

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $414,623 would pay approximately $2,588 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