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140 KULMBACHER DR, AUSTIN, TX 78728

AUSTIN, 78728 — williamson County

5 bed3 bath1,335 sqftBuilt 2019

Property at a Glance

This home is estimated between $228,879 and $638,567, with a best estimate of $612,815. 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

$228,879 $638,567
Best Estimate
$612,815
WCAD Value
$529,565
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in R305419C - TIMMERMANN/KB. The estimated range of $228,879 and $638,567 should be treated as a rough guide.

Comparable Properties (5)

148 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 99% similar Same subdivision
4 bed 2 bath 1,758 sqft Built 2019
Raw Value $398,640
Adjusted Value $228,879

Adjusted -$169,761 for 423 sqft less living space. Net adjustment: -$169,761.

144 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 94% similar Same subdivision
2 bed 2 bath 1,665 sqft Built 2019
Raw Value $391,347
Adjusted Value $258,910

Adjusted -$132,437 for 330 sqft less living space. Net adjustment: -$132,437.

4 bed 3 bath 1,224 sqft Built 2016
Raw Value $578,865
Adjusted Value $623,412

Adjusted +$44,547 for 111 sqft more living space. Net adjustment: +$44,547.

4 bed 2 bath 1,246 sqft Built 1988
Raw Value $577,097
Adjusted Value $612,815

Adjusted +$35,718 for 89 sqft more living space. Net adjustment: +$35,718.

4 bed 2 bath 1,229 sqft Built 2016
Raw Value $596,027
Adjusted Value $638,567

Adjusted +$42,540 for 106 sqft more living space. Net adjustment: +$42,540.

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 $612,815 would pay approximately $3,825 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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