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3905 BONNIE LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,822 sqftBuilt 2004

Property at a Glance

This home is estimated between $194,576 and $489,632, with a best estimate of $424,806. 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

$194,576 $489,632
Best Estimate
$424,806
WCAD Value
$323,271
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $194,576 and $489,632. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3903 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,263 sqft Built 1999
Raw Value $380,754
Adjusted Value $489,632

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

1540 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,520 sqft Built 2006
Raw Value $371,904
Adjusted Value $450,054

Adjusted +$69,927 for 302 sqft more living space and +$8,223 for being newer. Net adjustment: +$78,150.

3 bed 2 bath 1,825 sqft Built 2008
Raw Value $372,853
Adjusted Value $388,603

Adjusted -$695 for 3 sqft less living space and +$16,445 for being newer. Net adjustment: +$15,750.

3901 BONNIE LN, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,977 sqft Built 2000
Raw Value $477,141
Adjusted Value $424,806

Adjusted -$35,890 for 155 sqft less living space and -$16,445 for being older. Net adjustment: -$52,335.

1507 LORSON LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 2,281 sqft Built 1999
Raw Value $321,412
Adjusted Value $194,576

Adjusted -$106,280 for 459 sqft less living space and -$20,556 for being older. Net adjustment: -$126,836.

The Neighborhood

This home is valued 1.5% 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
$323,271
Median
$328,056

This home is -1.5% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,817 across all districts. With a homestead exemption claimed, that drops to $4,506 — saving $1,311 per year. That's $376 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%$2,887
Round RockCity0.3720%$1,203
Williamson CountyCounty0.3694%$1,194
Austin Community Collegespecial0.1034%$334
Williamson County FM/RdCounty0.0443%$143
Upper Brushy Creek WCIDWater0.0170%$55
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,817

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $424,806 would pay approximately $2,652 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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