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12603 MARIMBA TRL, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

3 bed2 bath663 sqftBuilt 1990

Property at a Glance

This home is estimated between $148,004 and $398,257, with a best estimate of $345,997. 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

$148,004 $398,257
Best Estimate
$345,997
WCAD Value
$391,801
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 $148,004 and $398,257. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

12601 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 532 sqft Built 1990
Raw Value $335,157
Adjusted Value $398,257

Adjusted +$63,100 for 131 sqft more living space. Net adjustment: +$63,100.

12605 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 912 sqft Built 1990
Raw Value $418,587
Adjusted Value $298,649

Adjusted -$119,938 for 249 sqft less living space. Net adjustment: -$119,938.

12607 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 870 sqft Built 1989
Raw Value $435,759
Adjusted Value $345,997

Adjusted -$99,707 for 207 sqft less living space and +$9,945 for being newer. Net adjustment: -$89,762.

12600 OLYMPIAD DR, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 736 sqft Built 1989
Raw Value $411,313
Adjusted Value $386,096

Adjusted -$35,162 for 73 sqft less living space and +$9,945 for being newer. Net adjustment: -$25,217.

12601 OLYMPIAD DR, AUSTIN, TX 78729
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,034 sqft Built 1987
Raw Value $296,872
Adjusted Value $148,004

Adjusted -$178,702 for 371 sqft less living space and +$29,834 for being newer. Net adjustment: -$148,868.

The Neighborhood

This home is valued 16.9% 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

above average
358 Properties
$335,104 Median Value
-8.3% YoY Change
0% Have Pool
97% Have Garage
This Home
$391,801
Median
$335,104

This home is +16.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,832 across all districts. With a homestead exemption claimed, that drops to $5,509 — saving $1,323 per year. That's $459 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%$3,499
Williamson CountyCounty0.3694%$1,447
North Austin MUD #1MUD0.2165%$848
Austin Community Collegespecial0.1034%$405
Williamson County ESD #1 - Jollyville VFDESD0.1000%$392
Williamson County FM/RdCounty0.0443%$174
Upper Brushy Creek WCIDWater0.0170%$67
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7438%$6,832

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $345,997 would pay approximately $2,160 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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