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3920 COLE VALLEY LN, ROUND ROCK, TX 78628

ROUND ROCK, 78628 — williamson County

4 bed3 bath1,873 sqftBuilt 2014

Property at a Glance

This home is estimated between $364,287 and $634,755, with a best estimate of $610,447. 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

$364,287 $634,755
Best Estimate
$610,447
WCAD Value
$604,911
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in G799514C - MAYFIELD RANCH. The estimated range of $364,287 and $634,755 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 1,893 sqft Built 2025
Raw Value $634,967
Adjusted Value $610,447

Adjusted -$4,433 for 20 sqft less living space and -$20,087 for being older. Net adjustment: -$24,520.

4 bed 3 bath 1,826 sqft Built 2024
Raw Value $637,496
Adjusted Value $629,654

Adjusted +$10,419 for 47 sqft more living space and -$18,261 for being older. Net adjustment: -$7,842.

4 bed 3 bath 1,897 sqft Built 2024
Raw Value $658,336
Adjusted Value $634,755

Adjusted -$5,320 for 24 sqft less living space and -$18,261 for being older. Net adjustment: -$23,581.

4 bed 3 bath 1,911 sqft Built 2019
Raw Value $381,841
Adjusted Value $364,287

Adjusted -$8,424 for 38 sqft less living space and -$9,130 for being older. Net adjustment: -$17,554.

4 bed 3 bath 1,911 sqft Built 2019
Raw Value $381,841
Adjusted Value $364,287

Adjusted -$8,424 for 38 sqft less living space and -$9,130 for being older. Net adjustment: -$17,554.

The Neighborhood

This home is valued 15.6% 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
$604,911
Median
$523,371

This home is +15.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,499 across all districts. With a homestead exemption claimed, that drops to $10,917 — saving $1,582 per year. That's $910 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%$6,355
Highlands at Mayfield Ranch MUDMUD0.4850%$2,934
Williamson CountyCounty0.3694%$2,235
Williamson County ESD #9 - Round RockESD0.0999%$604
Williamson County FM/RdCounty0.0443%$268
Upper Brushy Creek WCIDWater0.0170%$103
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$12,499

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $610,447 would pay approximately $3,810 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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