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136 KULMBACHER DR, AUSTIN, TX 78728

AUSTIN, 78728 — williamson County

4 bed2 bath774 sqftBuilt 2019

Property at a Glance

This home is estimated between $214,457 and $338,036, with a best estimate of $307,450. That places the property below the R305419C - TIMMERMANN/KB median of $476,646, in a neighborhood that declined 4.8% over the past year.

Estimated Value Range

$214,457 $338,036
Best Estimate
$307,450
WCAD Value
$433,806
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 $214,457 and $338,036. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

152 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 93% similar Same subdivision
3 bed 1,331 sqft Built 2020
Raw Value $540,971
Adjusted Value $317,433

Adjusted -$223,538 for 557 sqft less living space. Net adjustment: -$223,538.

156 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 92% similar Same subdivision
5 bed 3 bath 1,326 sqft Built 2019
Raw Value $528,982
Adjusted Value $307,450

Adjusted -$221,532 for 552 sqft less living space. Net adjustment: -$221,532.

132 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 92% similar Same subdivision
5 bed 3 bath 1,335 sqft Built 2019
Raw Value $563,180
Adjusted Value $338,036

Adjusted -$225,144 for 561 sqft less living space. Net adjustment: -$225,144.

4 bed 2 bath 987 sqft Built 1997
Raw Value $366,134
Adjusted Value $280,652

Adjusted -$85,482 for 213 sqft less living space. Net adjustment: -$85,482.

4 bed 2 bath 1,275 sqft Built 1997
Raw Value $415,521
Adjusted Value $214,457

Adjusted -$201,064 for 501 sqft less living space. Net adjustment: -$201,064.

The Neighborhood

This home is valued 9.0% below the R305419C - TIMMERMANN/KB median of $476,646. That positions it competitively for buyers comparing within the neighborhood. 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
$433,806
Median
$476,646

This home is -9.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $6,625 across all districts. With a homestead exemption claimed, that drops to $5,295 — saving $1,330 per year. That's $441 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%$3,874
Williamson CountyCounty0.3694%$1,603
Austin Community Collegespecial0.1034%$449
Williamson County ESD #9 - Round RockESD0.0999%$433
Williamson County FM/RdCounty0.0443%$192
Upper Brushy Creek WCIDWater0.0170%$74
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$6,625

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $307,450 would pay approximately $1,919 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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