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12923 MARIMBA TRL, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

3 bed2 bath740 sqftBuilt 1991

Property at a Glance

This home is estimated between $384,882 and $452,612, with a best estimate of $415,453. 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

$384,882 $452,612
Best Estimate
$415,453
WCAD Value
$387,627
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 $384,882 and $452,612. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

12921 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 632 sqft Built 1991
Raw Value $377,543
Adjusted Value $429,564

Adjusted +$52,021 for 108 sqft more living space. Net adjustment: +$52,021.

12925 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 708 sqft Built 1990
Raw Value $377,220
Adjusted Value $402,579

Adjusted +$15,414 for 32 sqft more living space and +$9,945 for being newer. Net adjustment: +$25,359.

12919 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 740 sqft Built 1990
Raw Value $374,937
Adjusted Value $384,882

Adjusted +$9,945 for being newer. Net adjustment: +$9,945.

12917 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 692 sqft Built 1991
Raw Value $392,332
Adjusted Value $415,453

Adjusted +$23,121 for 48 sqft more living space. Net adjustment: +$23,121.

12927 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 516 sqft Built 1991
Raw Value $344,716
Adjusted Value $452,612

Adjusted +$107,896 for 224 sqft more living space. Net adjustment: +$107,896.

The Neighborhood

This home is valued 15.7% 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
$387,627
Median
$335,104

This home is +15.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,759 across all districts. With a homestead exemption claimed, that drops to $5,437 — saving $1,322 per year. That's $453 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%$3,462
Williamson CountyCounty0.3694%$1,432
North Austin MUD #1MUD0.2165%$839
Austin Community Collegespecial0.1034%$401
Williamson County ESD #1 - Jollyville VFDESD0.1000%$388
Williamson County FM/RdCounty0.0443%$172
Upper Brushy Creek WCIDWater0.0170%$66
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7438%$6,759

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $415,453 would pay approximately $2,593 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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