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

132 KULMBACHER DR, AUSTIN, TX 78728

AUSTIN, 78728 — williamson County

5 bed3 bath1,335 sqftBuilt 2019

Property at a Glance

This home is estimated between $439,601 and $6,840,812, with a best estimate of $542,576. 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

$439,601 $6,840,812
Best Estimate
$542,576
WCAD Value
$563,180
Medium Confidence

Based on 5 comparable properties(3 in the same subdivision)

Based on 5 comparable properties (3 in the same subdivision, 2 nearby), the estimated range is $439,601 and $6,840,812. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

156 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 100% similar Same subdivision
5 bed 3 bath 1,326 sqft Built 2019
Raw Value $528,982
Adjusted Value $532,594

Adjusted +$3,612 for 9 sqft more living space. Net adjustment: +$3,612.

152 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 100% similar Same subdivision
3 bed 1,331 sqft Built 2020
Raw Value $540,971
Adjusted Value $542,576

Adjusted +$1,605 for 4 sqft more living space. Net adjustment: +$1,605.

136 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 92% similar Same subdivision
4 bed 2 bath 774 sqft Built 2019
Raw Value $433,806
Adjusted Value $658,950

Adjusted +$225,144 for 561 sqft more living space. Net adjustment: +$225,144.

4 bed 2 bath 1,275 sqft Built 1997
Raw Value $415,521
Adjusted Value $439,601

Adjusted +$24,080 for 60 sqft more living space. Net adjustment: +$24,080.

FM 1325, AUSTIN, TX 78728
0.00 mi 71% similar
3 bed 1,400 sqft Built 2004
Raw Value $6,806,705
Adjusted Value $6,840,812

Adjusted -$26,086 for 65 sqft less living space and +$60,193 for having a garage. Net adjustment: +$34,107.

The Neighborhood

This home is valued 18.2% 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

above average
143 Properties
$476,646 Median Value
-4.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$563,180
Median
$476,646

This home is +18.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,601 across all districts. With a homestead exemption claimed, that drops to $7,246 — saving $1,355 per year. That's $604 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%$5,030
Williamson CountyCounty0.3694%$2,081
Austin Community Collegespecial0.1034%$582
Williamson County ESD #9 - Round RockESD0.0999%$563
Williamson County FM/RdCounty0.0443%$250
Upper Brushy Creek WCIDWater0.0170%$96
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$8,601

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $542,576 would pay approximately $3,387 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