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148 KULMBACHER DR, AUSTIN, TX 78728

AUSTIN, 78728 — williamson County

4 bed2 bath1,758 sqftBuilt 2019

Property at a Glance

This home is estimated between $428,670 and $782,576, with a best estimate of $485,923. 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

$428,670 $782,576
Best Estimate
$485,923
WCAD Value
$398,640
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 $428,670 and $782,576 should be treated as a rough guide.

Comparable Properties (5)

144 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 100% similar Same subdivision
2 bed 2 bath 1,665 sqft Built 2019
Raw Value $391,347
Adjusted Value $428,670

Adjusted +$37,323 for 93 sqft more living space. Net adjustment: +$37,323.

140 KULMBACHER DR, AUSTIN, TX 78728
0.00 mi 99% similar Same subdivision
5 bed 3 bath 1,335 sqft Built 2019
Raw Value $529,565
Adjusted Value $699,326

Adjusted +$169,761 for 423 sqft more living space. Net adjustment: +$169,761.

4 bed 2 bath 1,246 sqft Built 1988
Raw Value $577,097
Adjusted Value $782,576

Adjusted +$205,479 for 512 sqft more living space. Net adjustment: +$205,479.

3 bed 2 bath 1,633 sqft Built 2014
Raw Value $435,757
Adjusted Value $485,923

Adjusted +$50,166 for 125 sqft more living space. Net adjustment: +$50,166.

3 bed 2 bath 1,633 sqft Built 2014
Raw Value $419,975
Adjusted Value $470,141

Adjusted +$50,166 for 125 sqft more living space. Net adjustment: +$50,166.

The Neighborhood

This home is valued 16.4% 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

below average
143 Properties
$476,646 Median Value
-4.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$398,640
Median
$476,646

This home is -16.4% below the subdivision median.

Tax Analysis

The estimated annual property tax is $6,088 across all districts. With a homestead exemption claimed, that drops to $4,764 — saving $1,324 per year. That's $397 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%$3,560
Williamson CountyCounty0.3694%$1,473
Austin Community Collegespecial0.1034%$412
Williamson County ESD #9 - Round RockESD0.0999%$398
Williamson County FM/RdCounty0.0443%$177
Upper Brushy Creek WCIDWater0.0170%$68
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$6,088

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $485,923 would pay approximately $3,033 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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