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12900 MARIMBA TRL, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

4 bed2 bath804 sqftBuilt 1989

Property at a Glance

This home is estimated between $368,982 and $413,908, with a best estimate of $400,866. 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

$368,982 $413,908
Best Estimate
$400,866
WCAD Value
$414,994
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 $368,982 and $413,908. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

12902 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 790 sqft Built 1991
Raw Value $390,503
Adjusted Value $377,357

Adjusted +$6,743 for 14 sqft more living space and -$19,889 for being older. Net adjustment: -$13,146.

12808 MARIMBA TRL, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 728 sqft Built 1991
Raw Value $397,190
Adjusted Value $413,908

Adjusted +$36,607 for 76 sqft more living space and -$19,889 for being older. Net adjustment: +$16,718.

12904 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 850 sqft Built 1989
Raw Value $391,139
Adjusted Value $368,982

Adjusted -$22,157 for 46 sqft less living space. Net adjustment: -$22,157.

12901 MARGIT DR, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
4 bed 2 bath 753 sqft Built 1990
Raw Value $391,343
Adjusted Value $405,964

Adjusted +$24,566 for 51 sqft more living space and -$9,945 for being older. Net adjustment: +$14,621.

12906 MARIMBA TRL, AUSTIN, TX 78729
0.02 mi 100% similar Same subdivision
3 bed 2 bath 758 sqft Built 1990
Raw Value $388,654
Adjusted Value $400,866

Adjusted +$22,157 for 46 sqft more living space and -$9,945 for being older. Net adjustment: +$12,212.

The Neighborhood

This home is valued 23.8% 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

above average
358 Properties
$335,104 Median Value
-8.3% YoY Change
0% Have Pool
97% Have Garage
This Home
$414,994
Median
$335,104

This home is +23.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $7,237 across all districts. With a homestead exemption claimed, that drops to $5,910 — saving $1,327 per year. That's $493 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%$3,706
Williamson CountyCounty0.3694%$1,533
North Austin MUD #1MUD0.2165%$898
Austin Community Collegespecial0.1034%$429
Williamson County ESD #1 - Jollyville VFDESD0.1000%$415
Williamson County FM/RdCounty0.0443%$184
Upper Brushy Creek WCIDWater0.0170%$71
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7438%$7,237

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $400,866 would pay approximately $2,502 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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