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3925 BONNIE LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,577 sqftBuilt 2003

Property at a Glance

This home is estimated between $179,131 and $459,462, with a best estimate of $343,336. 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

$179,131 $459,462
Best Estimate
$343,336
WCAD Value
$331,519
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 $179,131 and $459,462. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3927 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,964 sqft Built 2003
Raw Value $471,948
Adjusted Value $382,340

Adjusted -$89,608 for 387 sqft less living space. Net adjustment: -$89,608.

3923 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,280 sqft Built 2003
Raw Value $274,567
Adjusted Value $343,336

Adjusted +$68,769 for 297 sqft more living space. Net adjustment: +$68,769.

1508 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,280 sqft Built 2006
Raw Value $378,359
Adjusted Value $459,462

Adjusted +$68,769 for 297 sqft more living space and +$12,334 for being newer. Net adjustment: +$81,103.

3921 BONNIE LN, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 2,245 sqft Built 2003
Raw Value $333,804
Adjusted Value $179,131

Adjusted -$154,673 for 668 sqft less living space. Net adjustment: -$154,673.

1504 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 2,133 sqft Built 2007
Raw Value $312,522
Adjusted Value $200,227

Adjusted -$128,740 for 556 sqft less living space and +$16,445 for being newer. Net adjustment: -$112,295.

The Neighborhood

This home is valued 1.1% 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

typical
197 Properties
$328,056 Median Value
-4.7% YoY Change
0% Have Pool
100% Have Garage
This Home
$331,519
Median
$328,056

This home is +1.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $5,965 across all districts. With a homestead exemption claimed, that drops to $4,653 — saving $1,312 per year. That's $388 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%$2,961
Round RockCity0.3720%$1,233
Williamson CountyCounty0.3694%$1,225
Austin Community Collegespecial0.1034%$343
Williamson County FM/RdCounty0.0443%$147
Upper Brushy Creek WCIDWater0.0170%$56
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,965

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $343,336 would pay approximately $2,143 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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