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

16318 GREAT OAKS DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed65,150 sqftBuilt 2003

Property at a Glance

This home is estimated between $15,869,199 and $16,427,553, with a best estimate of $15,942,537.

Estimated Value Range

$15,869,199 $16,427,553
Best Estimate
$15,942,537
WCAD Value
$10,537,577
Low Confidence

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

There are 5 comparable properties within range, but none are in R30CP - Rr West Park Bldgs. The estimated range of $15,869,199 and $16,427,553 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,826 sqft Built 1999
Raw Value $1,198,279
Adjusted Value $16,427,553

Adjusted +$15,289,872 for 63,324 sqft more living space and -$405 for being older and -$60,193 for no garage. Net adjustment: +$15,229,274.

4 bed 3 bath 2,220 sqft Built 2010
Raw Value $733,945
Adjusted Value $15,869,199

Adjusted +$15,194,739 for 62,930 sqft more living space and +$708 for being newer and -$60,193 for no garage. Net adjustment: +$15,135,254.

7 bed 6 bath 4,748 sqft Built 2003
Raw Value $1,418,389
Adjusted Value $15,942,537

Adjusted +$14,584,341 for 60,402 sqft more living space and -$60,193 for no garage. Net adjustment: +$14,524,148.

3 bed 2 bath 2,264 sqft Built 1983
Raw Value $739,227
Adjusted Value $15,921,319

Adjusted +$15,184,115 for 62,886 sqft more living space and -$2,023 for being older. Net adjustment: +$15,182,092.

3 bed 3 bath 2,773 sqft Built 2024
Raw Value $1,137,038
Adjusted Value $16,200,376

Adjusted +$15,061,214 for 62,377 sqft more living space and +$2,124 for being newer. Net adjustment: +$15,063,338.

The Neighborhood

Subdivision comparison data is not available for this property.

Tax Analysis

The estimated annual property tax is $201,701 across all districts. With a homestead exemption claimed, that drops to $198,504 — saving $3,197 per year. That's $16,542 per month a buyer should budget. The assessed value increased 0.0%. This increase gives a protest opportunity score of 50 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$94,111
Brushy Creek MUDMUD0.3868%$40,763
Williamson CountyCounty0.3694%$38,931
Austin Community Collegespecial0.1034%$10,896
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$10,538
Williamson County FM/RdCounty0.0443%$4,671
Upper Brushy Creek WCIDWater0.0170%$1,791
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9141%$201,701
50 / 100

Moderate opportunity to protest.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $15,942,537 would pay approximately $99,513 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.

View full property details