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3915 BONNIE LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,804 sqftBuilt 2003

Property at a Glance

This home is estimated between $324,184 and $447,790, with a best estimate of $375,242. 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

$324,184 $447,790
Best Estimate
$375,242
WCAD Value
$325,112
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 $324,184 and $447,790. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3917 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,804 sqft Built 2003
Raw Value $324,184
Adjusted Value $324,184

This comparable closely matches the subject property's features.

3913 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,959 sqft Built 2003
Raw Value $475,415
Adjusted Value $439,525

Adjusted -$35,890 for 155 sqft less living space. Net adjustment: -$35,890.

1528 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,746 sqft Built 2006
Raw Value $306,010
Adjusted Value $331,774

Adjusted +$13,430 for 58 sqft more living space and +$12,334 for being newer. Net adjustment: +$25,764.

3 bed 2 bath 1,826 sqft Built 2006
Raw Value $368,002
Adjusted Value $375,242

Adjusted -$5,094 for 22 sqft less living space and +$12,334 for being newer. Net adjustment: +$7,240.

1524 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,564 sqft Built 2009
Raw Value $367,551
Adjusted Value $447,790

Adjusted +$55,571 for 240 sqft more living space and +$24,668 for being newer. Net adjustment: +$80,239.

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
$325,112
Median
$328,056

This home is -0.9% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,850 across all districts. With a homestead exemption claimed, that drops to $4,539 — saving $1,311 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%$2,904
Round RockCity0.3720%$1,209
Williamson CountyCounty0.3694%$1,201
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%$5,850

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $375,242 would pay approximately $2,342 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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