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

8220 TONKINESE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath2,366 sqftBuilt 1995

Property at a Glance

This home is estimated between $321,773 and $592,748, with a best estimate of $554,468. That places the property above the R222592G - CAT HOLLOW ALL SECTIONS R4 median of $451,685, in a neighborhood that declined 6.9% over the past year.

Estimated Value Range

$321,773 $592,748
Best Estimate
$554,468
WCAD Value
$450,288
High Confidence

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

Based on 5 comparable properties in R222592G - CAT HOLLOW ALL SECTIONS R4, this home's estimated market value is between $321,773 and $592,748. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

16716 TOMCAT DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,675 sqft Built 1995
Raw Value $367,941
Adjusted Value $554,468

Adjusted +$186,527 for 691 sqft more living space. Net adjustment: +$186,527.

6041 RONCHAMPS DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 3,097 sqft Built 2000
Raw Value $556,425
Adjusted Value $321,773

Adjusted -$197,324 for 731 sqft less living space and -$37,328 for being older. Net adjustment: -$234,652.

6004 RONCHAMPS DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 3,110 sqft Built 2000
Raw Value $572,254
Adjusted Value $334,092

Adjusted -$200,834 for 744 sqft less living space and -$37,328 for being older. Net adjustment: -$238,162.

16709 DORMAN DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,584 sqft Built 1995
Raw Value $381,657
Adjusted Value $592,748

Adjusted +$211,091 for 782 sqft more living space. Net adjustment: +$211,091.

16829 LUCKENWALD DR, ROUND ROCK, TX 78681
0.00 mi 99% similar Same subdivision
3 bed 2 bath 1,585 sqft Built 1997
Raw Value $383,881
Adjusted Value $579,771

Adjusted +$210,821 for 781 sqft more living space and -$14,931 for being older. Net adjustment: +$195,890.

The Neighborhood

This home is in line with the R222592G - CAT HOLLOW ALL SECTIONS R4 median of $451,685. Note that values in this subdivision declined 6.9% over the past year.

R222592G - CAT HOLLOW ALL SECTIONS R4

typical
1,233 Properties
$451,685 Median Value
-6.9% YoY Change
1% Have Pool
100% Have Garage
This Home
$450,288
Median
$451,685

This home is -0.3% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,619 across all districts. With a homestead exemption claimed, that drops to $7,286 — saving $1,333 per year. That's $607 per month a buyer should budget. The assessed value increased +1.0% vs the subdivision average of -6.9%. This above-average increase gives a protest opportunity score of 40 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$4,022
Brushy Creek MUDMUD0.3868%$1,742
Williamson CountyCounty0.3694%$1,664
Austin Community Collegespecial0.1034%$466
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$450
Williamson County FM/RdCounty0.0443%$200
Upper Brushy Creek WCIDWater0.0170%$77
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9141%$8,619
40 / 100

Moderate opportunity to protest.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $554,468 would pay approximately $3,461 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