Beta Williamson County, TX only — data and coverage are limited during early access.

3812 WINNIE PL, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,891 sqftBuilt 2021

Property at a Glance

This home is estimated between $569,209 and $1,326,734, with a best estimate of $760,673. That places the property above the G799514C - MAYFIELD RANCH median of $523,371, in a neighborhood that declined 9.3% over the past year.

Estimated Value Range

$569,209 $1,326,734
Best Estimate
$760,673
WCAD Value
$613,962
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in G799514C - MAYFIELD RANCH. The estimated range of $569,209 and $1,326,734 should be treated as a rough guide.

Comparable Properties (5)

3820 WINNIE PL, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 3,214 sqft Built 2021
Raw Value $640,809
Adjusted Value $569,209

Adjusted -$71,600 for 323 sqft less living space. Net adjustment: -$71,600.

3821 WINNIE PL, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
5 bed 3 bath 2,217 sqft Built 2021
Raw Value $546,251
Adjusted Value $695,659

Adjusted +$149,408 for 674 sqft more living space. Net adjustment: +$149,408.

4 bed 3 bath 2,729 sqft Built 2013
Raw Value $1,276,214
Adjusted Value $1,326,734

Adjusted +$35,911 for 162 sqft more living space and +$14,609 for being newer. Net adjustment: +$50,520.

4 bed 3 bath 2,882 sqft Built 2007
Raw Value $733,113
Adjusted Value $760,673

Adjusted +$1,995 for 9 sqft more living space and +$25,565 for being newer. Net adjustment: +$27,560.

4 bed 3 bath 2,711 sqft Built 2012
Raw Value $1,185,625
Adjusted Value $1,241,961

Adjusted +$39,901 for 180 sqft more living space and +$16,435 for being newer. Net adjustment: +$56,336.

The Neighborhood

This home is valued 17.3% 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

above average
1,093 Properties
$523,371 Median Value
-9.3% YoY Change
1% Have Pool
100% Have Garage
This Home
$613,962
Median
$523,371

This home is +17.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,686 across all districts. With a homestead exemption claimed, that drops to $11,102 — saving $1,584 per year. That's $925 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%$6,450
Highlands at Mayfield Ranch MUDMUD0.4850%$2,978
Williamson CountyCounty0.3694%$2,268
Williamson County ESD #9 - Round RockESD0.0999%$613
Williamson County FM/RdCounty0.0443%$272
Upper Brushy Creek WCIDWater0.0170%$104
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$12,686

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $760,673 would pay approximately $4,748 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 4/19/2026.

View full property details