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

12905 MARIMBA TRL, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

3 bed2 bath516 sqftBuilt 1991

Property at a Glance

This home is estimated between $210,127 and $409,751, with a best estimate of $313,971. That places the property below the R390485G - Milwood Sec 28 & 29 median of $335,104, in a neighborhood that declined 8.3% over the past year.

Estimated Value Range

$210,127 $409,751
Best Estimate
$313,971
WCAD Value
$354,679
High Confidence

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

Based on 5 comparable properties in R390485G - Milwood Sec 28 & 29, this home's estimated market value is between $210,127 and $409,751. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

12903 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 668 sqft Built 1989
Raw Value $367,297
Adjusted Value $313,971

Adjusted -$73,215 for 152 sqft less living space and +$19,889 for being newer. Net adjustment: -$53,326.

12907 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 740 sqft Built 1991
Raw Value $390,006
Adjusted Value $282,110

Adjusted -$107,896 for 224 sqft less living space. Net adjustment: -$107,896.

12901 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 814 sqft Built 1987
Raw Value $313,888
Adjusted Value $210,127

Adjusted -$143,540 for 298 sqft less living space and +$39,779 for being newer. Net adjustment: -$103,761.

12909 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 516 sqft Built 1991
Raw Value $409,751
Adjusted Value $409,751

This comparable closely matches the subject property's features.

12807 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 670 sqft Built 1989
Raw Value $380,363
Adjusted Value $326,074

Adjusted -$74,178 for 154 sqft less living space and +$19,889 for being newer. Net adjustment: -$54,289.

The Neighborhood

This home is valued 5.8% above the R390485G - Milwood Sec 28 & 29 median of $335,104. With 358 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.3% over the past year.

R390485G - Milwood Sec 28 & 29

typical
358 Properties
$335,104 Median Value
-8.3% YoY Change
0% Have Pool
97% Have Garage
This Home
$354,679
Median
$335,104

This home is +5.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,185 across all districts. With a homestead exemption claimed, that drops to $4,869 — saving $1,316 per year. That's $406 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%$3,168
Williamson CountyCounty0.3694%$1,310
North Austin MUD #1MUD0.2165%$768
Austin Community Collegespecial0.1034%$367
Williamson County ESD #1 - Jollyville VFDESD0.1000%$355
Williamson County FM/RdCounty0.0443%$157
Upper Brushy Creek WCIDWater0.0170%$60
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7438%$6,185

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $313,971 would pay approximately $1,960 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