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3640 FLOWSTONE LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath920 sqftBuilt 2002

Property at a Glance

This home is estimated between $180,605 and $406,667, with a best estimate of $343,532. That places the property below the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194, in a neighborhood that declined 10.9% over the past year.

Estimated Value Range

$180,605 $406,667
Best Estimate
$343,532
WCAD Value
$375,535
High Confidence

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

Based on 5 comparable properties in R107503F - PRESERVE AT STONE OAK - PH 3 & 4, this home's estimated market value is between $180,605 and $406,667. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3428 FLOWSTONE LN, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,140 sqft Built 2000
Raw Value $367,823
Adjusted Value $320,235

Adjusted -$44,786 for 220 sqft less living space and -$2,802 for being older. Net adjustment: -$47,588.

3430 FLOWSTONE LN, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
3 bed 2 bath 987 sqft Built 2000
Raw Value $359,973
Adjusted Value $343,532

Adjusted -$13,639 for 67 sqft less living space and -$2,802 for being older. Net adjustment: -$16,441.

3424 FLOWSTONE LN, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
3 bed 2 bath 966 sqft Built 2000
Raw Value $418,833
Adjusted Value $406,667

Adjusted -$9,364 for 46 sqft less living space and -$2,802 for being older. Net adjustment: -$12,166.

3440 FLOWSTONE LN, ROUND ROCK, TX 78681
0.06 mi 100% similar Same subdivision
3 bed 2 bath 1,462 sqft Built 2001
Raw Value $292,343
Adjusted Value $180,605

Adjusted -$110,337 for 542 sqft less living space and -$1,401 for being older. Net adjustment: -$111,738.

3414 FLOWSTONE LN, ROUND ROCK, TX 78681
0.07 mi 100% similar Same subdivision
3 bed 2 bath 885 sqft Built 2000
Raw Value $358,587
Adjusted Value $362,910

Adjusted +$7,125 for 35 sqft more living space and -$2,802 for being older. Net adjustment: +$4,323.

The Neighborhood

This home is valued 2.0% above the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194. With 1,045 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 10.9% over the past year.

R107503F - PRESERVE AT STONE OAK - PH 3 & 4

typical
1,045 Properties
$368,194 Median Value
-10.9% YoY Change
1% Have Pool
99% Have Garage
This Home
$375,535
Median
$368,194

This home is +2.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,757 across all districts. With a homestead exemption claimed, that drops to $5,437 — saving $1,320 per year. That's $453 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%$3,354
Round RockCity0.3720%$1,397
Williamson CountyCounty0.3694%$1,387
Austin Community Collegespecial0.1034%$388
Williamson County FM/RdCounty0.0443%$166
Upper Brushy Creek WCIDWater0.0170%$64
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,757

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $343,532 would pay approximately $2,144 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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