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133 GENNAKER DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,662 sqftBuilt 2017

Property at a Glance

This home is estimated between $512,655 and $907,525, with a best estimate of $693,237. That places the property below the R302609C - HIGHLAND HORIZON median of $781,434, in a neighborhood that appreciated 2.3% over the past year.

Estimated Value Range

$512,655 $907,525
Best Estimate
$693,237
WCAD Value
$790,744
Low Confidence

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

There are 5 comparable properties within range, but none are in R302609C - HIGHLAND HORIZON. The estimated range of $512,655 and $907,525 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $693,237

Adjusted -$46,089 for 149 sqft less living space and +$37,311 for being newer. Net adjustment: -$8,778.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $512,655

Adjusted -$78,568 for 254 sqft less living space and +$12,437 for being newer. Net adjustment: -$66,131.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $520,754

Adjusted -$78,568 for 254 sqft less living space and +$37,311 for being newer. Net adjustment: -$41,257.

4 bed 3 bath 2,219 sqft Built 2007
Raw Value $904,649
Adjusted Value $856,724

Adjusted -$172,294 for 557 sqft less living space and +$124,369 for being newer. Net adjustment: -$47,925.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $907,525

Adjusted -$152,188 for 492 sqft less living space and +$198,991 for being newer. Net adjustment: +$46,803.

The Neighborhood

This home is valued 1.2% above the R302609C - HIGHLAND HORIZON median of $781,434. With 399 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 2.3% over the past year.

R302609C - HIGHLAND HORIZON

typical
399 Properties
$781,434 Median Value
+2.3% YoY Change
0% Have Pool
100% Have Garage
This Home
$790,744
Median
$781,434

This home is +1.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $15,798 across all districts. With a homestead exemption claimed, that drops to $14,402 — saving $1,396 per year. That's $1,200 per month a buyer should budget. The assessed value increased +10.3% vs the subdivision average of +2.3%. This above-average increase gives a protest opportunity score of 70 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$7,040
Brushy Creek MUDMUD0.3868%$3,049
Williamson CountyCounty0.3694%$2,912
Austin Community Collegespecial0.1034%$815
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$788
Brushy Creek MUD Defined AreaMUD0.0900%$709
Williamson County FM/RdCounty0.0443%$349
Upper Brushy Creek WCIDWater0.0170%$134
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0041%$15,798
70 / 100

There may be a strong case to protest this appraisal.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $693,237 would pay approximately $4,327 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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