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4040 FLOWSTONE LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,876 sqftBuilt 2017

Property at a Glance

This home is estimated between $400,737 and $597,913, with a best estimate of $422,429. That places the property below the G799514C - MAYFIELD RANCH median of $523,371, in a neighborhood that declined 9.3% over the past year.

Estimated Value Range

$400,737 $597,913
Best Estimate
$422,429
WCAD Value
$594,180
High Confidence

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

Based on 5 comparable properties in G799514C - MAYFIELD RANCH, this home's estimated market value is between $400,737 and $597,913. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

4036 FLOWSTONE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,813 sqft Built 2017
Raw Value $408,464
Adjusted Value $422,429

Adjusted +$13,965 for 63 sqft more living space. Net adjustment: +$13,965.

4044 FLOWSTONE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,508 sqft Built 2016
Raw Value $514,511
Adjusted Value $597,913

Adjusted +$81,576 for 368 sqft more living space and +$1,826 for being newer. Net adjustment: +$83,402.

4032 FLOWSTONE LN, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
4 bed 3 bath 1,535 sqft Built 2016
Raw Value $507,847
Adjusted Value $585,264

Adjusted +$75,591 for 341 sqft more living space and +$1,826 for being newer. Net adjustment: +$77,417.

4048 FLOWSTONE LN, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,016 sqft Built 2017
Raw Value $450,484
Adjusted Value $419,450

Adjusted -$31,034 for 140 sqft less living space. Net adjustment: -$31,034.

4052 FLOWSTONE LN, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,104 sqft Built 2017
Raw Value $451,279
Adjusted Value $400,737

Adjusted -$50,542 for 228 sqft less living space. Net adjustment: -$50,542.

The Neighborhood

This home is valued 13.5% above the G799514C - MAYFIELD RANCH median of $523,371. With 1,093 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 9.3% over the past year.

G799514C - MAYFIELD RANCH

typical
1,093 Properties
$523,371 Median Value
-9.3% YoY Change
1% Have Pool
100% Have Garage
This Home
$594,180
Median
$523,371

This home is +13.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,277 across all districts. With a homestead exemption claimed, that drops to $10,697 — saving $1,580 per year. That's $891 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
Georgetown ISDSchool1.0506%$6,242
Highlands at Mayfield Ranch MUDMUD0.4850%$2,882
Williamson CountyCounty0.3694%$2,195
Williamson County ESD #9 - Round RockESD0.0999%$594
Williamson County FM/RdCounty0.0443%$263
Upper Brushy Creek WCIDWater0.0170%$101
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$12,277

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $422,429 would pay approximately $2,637 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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