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3909 BONNIE LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath845 sqftBuilt 2004

Property at a Glance

This home is estimated between $118,151 and $302,425, with a best estimate of $232,060. 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

$118,151 $302,425
Best Estimate
$232,060
WCAD Value
$311,739
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 $118,151 and $302,425. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3907 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 924 sqft Built 2003
Raw Value $324,828
Adjusted Value $302,425

Adjusted -$18,292 for 79 sqft less living space and -$4,111 for being older. Net adjustment: -$22,403.

3906 BONNIE LN, ROUND ROCK, TX 78665
0.03 mi 98% similar Same subdivision
3 bed 2 bath 1,108 sqft Built 2003
Raw Value $361,500
Adjusted Value $296,492

Adjusted -$60,897 for 263 sqft less living space and -$4,111 for being older. Net adjustment: -$65,008.

1532 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 97% similar Same subdivision
4 bed 3 bath 1,744 sqft Built 2004
Raw Value $326,311
Adjusted Value $118,151

Adjusted -$208,160 for 899 sqft less living space. Net adjustment: -$208,160.

3908 BONNIE LN, ROUND ROCK, TX 78665
0.03 mi 96% similar Same subdivision
4 bed 3 bath 1,911 sqft Built 2004
Raw Value $478,888
Adjusted Value $232,060

Adjusted -$246,828 for 1,066 sqft less living space. Net adjustment: -$246,828.

3912 BONNIE LN, ROUND ROCK, TX 78665
0.04 mi 94% similar Same subdivision
3 bed 2 bath 1,280 sqft Built 2003
Raw Value $274,213
Adjusted Value $169,379

Adjusted -$100,723 for 435 sqft less living space and -$4,111 for being older. Net adjustment: -$104,834.

The Neighborhood

This home is valued 5.0% 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
$311,739
Median
$328,056

This home is -5.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,609 across all districts. With a homestead exemption claimed, that drops to $4,301 — saving $1,308 per year. That's $358 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%$2,784
Round RockCity0.3720%$1,160
Williamson CountyCounty0.3694%$1,152
Austin Community Collegespecial0.1034%$322
Williamson County FM/RdCounty0.0443%$138
Upper Brushy Creek WCIDWater0.0170%$53
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,609

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $232,060 would pay approximately $1,449 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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