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12903 MARIMBA TRL, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

3 bed2 bath668 sqftBuilt 1989

Property at a Glance

This home is estimated between $263,452 and $408,005, with a best estimate of $363,375. That places the property above the R390485G - Milwood Sec 28 & 29 median of $335,104, in a neighborhood that declined 8.3% over the past year.

Estimated Value Range

$263,452 $408,005
Best Estimate
$363,375
WCAD Value
$367,297
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 $263,452 and $408,005. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

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 $263,452

Adjusted -$70,325 for 146 sqft less living space and +$19,889 for being newer. Net adjustment: -$50,436.

12905 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 516 sqft Built 1991
Raw Value $354,679
Adjusted Value $408,005

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

12807 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 670 sqft Built 1989
Raw Value $380,363
Adjusted Value $379,400

Adjusted -$963 for 2 sqft less living space. Net adjustment: -$963.

12907 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 740 sqft Built 1991
Raw Value $390,006
Adjusted Value $335,436

Adjusted -$34,681 for 72 sqft less living space and -$19,889 for being older. Net adjustment: -$54,570.

12805 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 620 sqft Built 1987
Raw Value $320,365
Adjusted Value $363,375

Adjusted +$23,121 for 48 sqft more living space and +$19,889 for being newer. Net adjustment: +$43,010.

The Neighborhood

This home is valued 9.6% 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
$367,297
Median
$335,104

This home is +9.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,405 across all districts. With a homestead exemption claimed, that drops to $5,087 — saving $1,318 per year. That's $424 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%$3,280
Williamson CountyCounty0.3694%$1,357
North Austin MUD #1MUD0.2165%$795
Austin Community Collegespecial0.1034%$380
Williamson County ESD #1 - Jollyville VFDESD0.1000%$367
Williamson County FM/RdCounty0.0443%$163
Upper Brushy Creek WCIDWater0.0170%$62
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7438%$6,405

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $363,375 would pay approximately $2,268 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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