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3916 BONNIE LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath1,540 sqftBuilt 2003

Property at a Glance

This home is estimated between $157,060 and $473,941, with a best estimate of $326,991. 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

$157,060 $473,941
Best Estimate
$326,991
WCAD Value
$368,825
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in R409599G - STONEY BROOK - ALL SECTIONS. The estimated range of $157,060 and $473,941 should be treated as a rough guide.

Comparable Properties (5)

3914 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,977 sqft Built 2002
Raw Value $311,933
Adjusted Value $206,636

Adjusted -$101,186 for 437 sqft less living space and -$4,111 for being older. Net adjustment: -$105,297.

3 bed 2 bath 1,557 sqft Built 2005
Raw Value $322,704
Adjusted Value $326,991

Adjusted -$3,936 for 17 sqft less living space and +$8,223 for being newer. Net adjustment: +$4,287.

3918 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,272 sqft Built 2003
Raw Value $326,552
Adjusted Value $157,060

Adjusted -$169,492 for 732 sqft less living space. Net adjustment: -$169,492.

4 bed 2 bath 1,752 sqft Built 2005
Raw Value $514,806
Adjusted Value $473,941

Adjusted -$49,088 for 212 sqft less living space and +$8,223 for being newer. Net adjustment: -$40,865.

3 bed 2 bath 1,568 sqft Built 2005
Raw Value $326,532
Adjusted Value $328,272

Adjusted -$6,483 for 28 sqft less living space and +$8,223 for being newer. Net adjustment: +$1,740.

The Neighborhood

This home is valued 12.4% 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
$368,825
Median
$328,056

This home is +12.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,636 across all districts. With a homestead exemption claimed, that drops to $5,318 — saving $1,318 per year. That's $443 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%$3,294
Round RockCity0.3720%$1,372
Williamson CountyCounty0.3694%$1,363
Austin Community Collegespecial0.1034%$381
Williamson County FM/RdCounty0.0443%$163
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,636

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $326,991 would pay approximately $2,041 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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