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3931 BONNIE LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath789 sqftBuilt 2004

Property at a Glance

This home is estimated between $156,767 and $310,545, with a best estimate of $297,595. 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

$156,767 $310,545
Best Estimate
$297,595
WCAD Value
$327,057
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 $156,767 and $310,545. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3929 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
4 bed 3 bath 862 sqft Built 2004
Raw Value $327,448
Adjusted Value $310,545

Adjusted -$16,903 for 73 sqft less living space. Net adjustment: -$16,903.

3933 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,076 sqft Built 2003
Raw Value $316,026
Adjusted Value $245,461

Adjusted -$66,454 for 287 sqft less living space and -$4,111 for being older. Net adjustment: -$70,565.

3810 SANDY BROOK DR, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,050 sqft Built 2006
Raw Value $351,190
Adjusted Value $298,979

Adjusted -$60,434 for 261 sqft less living space and +$8,223 for being newer. Net adjustment: -$52,211.

3923 BONNIE LN, ROUND ROCK, TX 78665
0.04 mi 100% similar Same subdivision
3 bed 2 bath 1,280 sqft Built 2003
Raw Value $274,567
Adjusted Value $156,767

Adjusted -$113,689 for 491 sqft less living space and -$4,111 for being older. Net adjustment: -$117,800.

1512 TONIA LOOP, ROUND ROCK, TX 78665
0.06 mi 100% similar Same subdivision
3 bed 2 bath 1,083 sqft Built 2006
Raw Value $357,447
Adjusted Value $297,595

Adjusted -$68,075 for 294 sqft less living space and +$8,223 for being newer. Net adjustment: -$59,852.

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
$327,057
Median
$328,056

This home is -0.3% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,885 across all districts. With a homestead exemption claimed, that drops to $4,574 — saving $1,311 per year. That's $381 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%$2,921
Round RockCity0.3720%$1,217
Williamson CountyCounty0.3694%$1,208
Austin Community Collegespecial0.1034%$338
Williamson County FM/RdCounty0.0443%$145
Upper Brushy Creek WCIDWater0.0170%$56
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,885

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $297,595 would pay approximately $1,858 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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