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3218 MAYFIELD RANCH CV, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed4 bath2,250 sqftBuilt 2018

Property at a Glance

This home is estimated between $389,516 and $634,384, with a best estimate of $520,543. That places the property below the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673, in a neighborhood that declined 8.0% over the past year.

Estimated Value Range

$389,516 $634,384
Best Estimate
$520,543
WCAD Value
$714,018
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP. The estimated range of $389,516 and $634,384 should be treated as a rough guide.

Comparable Properties (5)

5 bed 4 bath 2,173 sqft Built 2021
Raw Value $533,685
Adjusted Value $551,291

Adjusted +$23,598 for 77 sqft more living space and -$5,992 for being older. Net adjustment: +$17,606.

4 bed 3 bath 2,202 sqft Built 2021
Raw Value $470,037
Adjusted Value $478,755

Adjusted +$14,710 for 48 sqft more living space and -$5,992 for being older. Net adjustment: +$8,718.

3222 MAYFIELD RANCH CV, ROUND ROCK, TX 78681
0.00 mi 99% similar Same subdivision
3 bed 2,977 sqft Built 2015
Raw Value $606,326
Adjusted Value $389,516

Adjusted -$222,802 for 727 sqft less living space and +$5,992 for being newer. Net adjustment: -$216,810.

4 bed 3 bath 2,173 sqft Built 2021
Raw Value $502,937
Adjusted Value $520,543

Adjusted +$23,598 for 77 sqft more living space and -$5,992 for being older. Net adjustment: +$17,606.

4 bed 3 bath 1,886 sqft Built 2021
Raw Value $528,822
Adjusted Value $634,384

Adjusted +$111,554 for 364 sqft more living space and -$5,992 for being older. Net adjustment: +$105,562.

The Neighborhood

This home is valued 14.5% above the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673. With 427 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.0% over the past year.

L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP

typical
427 Properties
$623,673 Median Value
-8.0% YoY Change
1% Have Pool
100% Have Garage
This Home
$714,018
Median
$623,673

This home is +14.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,847 across all districts. With a homestead exemption claimed, that drops to $11,465 — saving $1,382 per year. That's $955 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%$6,377
Round RockCity0.3720%$2,656
Williamson CountyCounty0.3694%$2,638
Austin Community Collegespecial0.1034%$738
Williamson County FM/RdCounty0.0443%$317
Upper Brushy Creek WCIDWater0.0170%$121
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$12,847

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $520,543 would pay approximately $3,249 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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