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3903 BONNIE LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,263 sqftBuilt 1999

Property at a Glance

This home is estimated between $212,072 and $419,767, with a best estimate of $341,176. 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

$212,072 $419,767
Best Estimate
$341,176
WCAD Value
$380,754
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 $212,072 and $419,767. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3905 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,822 sqft Built 2004
Raw Value $323,271
Adjusted Value $214,393

Adjusted -$129,434 for 559 sqft less living space and +$20,556 for being newer. Net adjustment: -$108,878.

3907 BONNIE LN, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 924 sqft Built 2003
Raw Value $324,828
Adjusted Value $419,767

Adjusted +$78,494 for 339 sqft more living space and +$16,445 for being newer. Net adjustment: +$94,939.

1540 TONIA LOOP, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,520 sqft Built 2006
Raw Value $371,904
Adjusted Value $341,176

Adjusted -$59,507 for 257 sqft less living space and +$28,779 for being newer. Net adjustment: -$30,728.

3904 BONNIE LN, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,822 sqft Built 2004
Raw Value $320,950
Adjusted Value $212,072

Adjusted -$129,434 for 559 sqft less living space and +$20,556 for being newer. Net adjustment: -$108,878.

1505 LORSON LOOP, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,293 sqft Built 1999
Raw Value $385,663
Adjusted Value $378,717

Adjusted -$6,946 for 30 sqft less living space. Net adjustment: -$6,946.

The Neighborhood

This home is valued 16.1% 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

above average
197 Properties
$328,056 Median Value
-4.7% YoY Change
0% Have Pool
100% Have Garage
This Home
$380,754
Median
$328,056

This home is +16.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,851 across all districts. With a homestead exemption claimed, that drops to $5,530 — saving $1,321 per year. That's $461 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%$3,401
Round RockCity0.3720%$1,416
Williamson CountyCounty0.3694%$1,407
Austin Community Collegespecial0.1034%$394
Williamson County FM/RdCounty0.0443%$169
Upper Brushy Creek WCIDWater0.0170%$65
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,851

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $341,176 would pay approximately $2,130 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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