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1528 TONIA LOOP, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,746 sqftBuilt 2006

Property at a Glance

This home is estimated between $299,348 and $435,240, with a best estimate of $349,478. 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

$299,348 $435,240
Best Estimate
$349,478
WCAD Value
$306,010
Medium Confidence

Based on 5 comparable properties(3 in the same subdivision)

Based on 5 comparable properties (3 in the same subdivision, 2 nearby), the estimated range is $299,348 and $435,240. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3 bed 2 bath 1,826 sqft Built 2006
Raw Value $368,002
Adjusted Value $349,478

Adjusted -$18,524 for 80 sqft less living space. Net adjustment: -$18,524.

1524 TONIA LOOP, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,564 sqft Built 2009
Raw Value $367,551
Adjusted Value $422,026

Adjusted +$42,141 for 182 sqft more living space and +$12,334 for being newer. Net adjustment: +$54,475.

1532 TONIA LOOP, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
4 bed 3 bath 1,744 sqft Built 2004
Raw Value $326,311
Adjusted Value $318,551

Adjusted +$463 for 2 sqft more living space and -$8,223 for being older. Net adjustment: -$7,760.

4 bed 2 bath 1,783 sqft Built 2006
Raw Value $443,807
Adjusted Value $435,240

Adjusted -$8,567 for 37 sqft less living space. Net adjustment: -$8,567.

3915 BONNIE LN, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,804 sqft Built 2003
Raw Value $325,112
Adjusted Value $299,348

Adjusted -$13,430 for 58 sqft less living space and -$12,334 for being older. Net adjustment: -$25,764.

The Neighborhood

This home is valued 6.7% 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
$306,010
Median
$328,056

This home is -6.7% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,506 across all districts. With a homestead exemption claimed, that drops to $4,199 — saving $1,307 per year. That's $350 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%$2,733
Round RockCity0.3720%$1,138
Williamson CountyCounty0.3694%$1,131
Austin Community Collegespecial0.1034%$316
Williamson County FM/RdCounty0.0443%$136
Upper Brushy Creek WCIDWater0.0170%$52
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,506

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $349,478 would pay approximately $2,181 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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