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

124 KULMBACHER DR, AUSTIN, TX 78728

AUSTIN, 78728 — williamson County

5 bed3 bath1,335 sqftBuilt 2019

Property at a Glance

This home is estimated between $529,448 and $611,571, with a best estimate of $592,554. That places the property above the R305419C - TIMMERMANN/KB median of $476,646, in a neighborhood that declined 4.8% over the past year.

Estimated Value Range

$529,448 $611,571
Best Estimate
$592,554
WCAD Value
$529,565
Low Confidence

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

There are 5 comparable properties within range, but none are in R305419C - TIMMERMANN/KB. The estimated range of $529,448 and $611,571 should be treated as a rough guide.

Comparable Properties (5)

4 bed 2 bath 1,344 sqft Built 2015
Raw Value $598,028
Adjusted Value $594,416

Adjusted -$3,612 for 9 sqft less living space. Net adjustment: -$3,612.

4 bed 3 bath 1,314 sqft Built 1992
Raw Value $603,143
Adjusted Value $611,571

Adjusted +$8,428 for 21 sqft more living space. Net adjustment: +$8,428.

4 bed 2 bath 1,469 sqft Built 1998
Raw Value $586,120
Adjusted Value $532,342

Adjusted -$53,778 for 134 sqft less living space. Net adjustment: -$53,778.

4 bed 2 bath 1,507 sqft Built 1998
Raw Value $598,476
Adjusted Value $529,448

Adjusted -$69,028 for 172 sqft less living space. Net adjustment: -$69,028.

4 bed 3 bath 1,417 sqft Built 1989
Raw Value $625,463
Adjusted Value $592,554

Adjusted -$32,909 for 82 sqft less living space. Net adjustment: -$32,909.

The Neighborhood

This home is valued 11.1% above the R305419C - TIMMERMANN/KB median of $476,646. With 143 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.8% over the past year.

R305419C - TIMMERMANN/KB

typical
143 Properties
$476,646 Median Value
-4.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$529,565
Median
$476,646

This home is +11.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,087 across all districts. With a homestead exemption claimed, that drops to $6,739 — saving $1,348 per year. That's $562 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%$4,730
Williamson CountyCounty0.3694%$1,956
Austin Community Collegespecial0.1034%$548
Williamson County ESD #9 - Round RockESD0.0999%$529
Williamson County FM/RdCounty0.0443%$235
Upper Brushy Creek WCIDWater0.0170%$90
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$8,087

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $592,554 would pay approximately $3,699 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