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3923 BONNIE LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,280 sqftBuilt 2003

Property at a Glance

This home is estimated between $222,352 and $415,396, with a best estimate of $271,265. 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

$222,352 $415,396
Best Estimate
$271,265
WCAD Value
$274,567
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 $222,352 and $415,396. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3925 BONNIE LN, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,577 sqft Built 2003
Raw Value $331,519
Adjusted Value $262,750

Adjusted -$68,769 for 297 sqft less living space. Net adjustment: -$68,769.

1508 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,280 sqft Built 2006
Raw Value $378,359
Adjusted Value $390,693

Adjusted +$12,334 for being newer. Net adjustment: +$12,334.

1512 TONIA LOOP, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,083 sqft Built 2006
Raw Value $357,447
Adjusted Value $415,396

Adjusted +$45,615 for 197 sqft more living space and +$12,334 for being newer. Net adjustment: +$57,949.

3919 BONNIE LN, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,280 sqft Built 2003
Raw Value $271,265
Adjusted Value $271,265

This comparable closely matches the subject property's features.

1516 TONIA LOOP, ROUND ROCK, TX 78665
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,725 sqft Built 2007
Raw Value $308,945
Adjusted Value $222,352

Adjusted -$103,038 for 445 sqft less living space and +$16,445 for being newer. Net adjustment: -$86,593.

The Neighborhood

This home is valued 16.3% 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

below average
197 Properties
$328,056 Median Value
-4.7% YoY Change
0% Have Pool
100% Have Garage
This Home
$274,567
Median
$328,056

This home is -16.3% below the subdivision median.

Tax Analysis

The estimated annual property tax is $4,940 across all districts. With a homestead exemption claimed, that drops to $3,639 — saving $1,301 per year. That's $303 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%$2,452
Round RockCity0.3720%$1,021
Williamson CountyCounty0.3694%$1,014
Austin Community Collegespecial0.1034%$284
Williamson County FM/RdCounty0.0443%$122
Upper Brushy Creek WCIDWater0.0170%$47
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$4,940

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $271,265 would pay approximately $1,693 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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