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12400 TREE LINE DR, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

3 bed3 bath1,895 sqftBuilt 1982

Property at a Glance

This home is estimated between $354,921 and $403,393, with a best estimate of $354,921. That places the property below the R371X - Round Rock West Below 45 - Duplex median of $419,343, in a neighborhood that declined 8.8% over the past year.

Estimated Value Range

$354,921 $403,393
Best Estimate
$354,921
WCAD Value
$388,979
High Confidence

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

Based on 5 comparable properties in R371X - Round Rock West Below 45 - Duplex, this home's estimated market value is between $354,921 and $403,393. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

12402 TREE LINE DR, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
4 bed 3 bath 1,781 sqft Built 1981
Raw Value $375,239
Adjusted Value $403,393

Adjusted +$24,021 for 114 sqft more living space and +$4,133 for being newer. Net adjustment: +$28,154.

12404 TREE LINE DR, AUSTIN, TX 78729
0.03 mi 100% similar Same subdivision
3 bed 2 bath 2,185 sqft Built 1981
Raw Value $411,893
Adjusted Value $354,921

Adjusted -$61,105 for 290 sqft less living space and +$4,133 for being newer. Net adjustment: -$56,972.

12401 TREE LINE DR, AUSTIN, TX 78729
0.04 mi 100% similar Same subdivision
4 bed 4 bath 1,992 sqft Built 1982
Raw Value $402,579
Adjusted Value $382,140

Adjusted -$20,439 for 97 sqft less living space. Net adjustment: -$20,439.

12403 TREE LINE DR, AUSTIN, TX 78729
0.04 mi 100% similar Same subdivision
4 bed 4 bath 2,185 sqft Built 1981
Raw Value $411,893
Adjusted Value $354,921

Adjusted -$61,105 for 290 sqft less living space and +$4,133 for being newer. Net adjustment: -$56,972.

12406 TREE LINE DR, AUSTIN, TX 78729
0.04 mi 100% similar Same subdivision
3 bed 2 bath 2,185 sqft Built 1981
Raw Value $411,893
Adjusted Value $354,921

Adjusted -$61,105 for 290 sqft less living space and +$4,133 for being newer. Net adjustment: -$56,972.

The Neighborhood

This home is valued 7.2% below the R371X - Round Rock West Below 45 - Duplex median of $419,343. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 8.8% over the past year.

R371X - Round Rock West Below 45 - Duplex

typical
462 Properties
$419,343 Median Value
-8.8% YoY Change
0% Have Pool
94% Have Garage
This Home
$388,979
Median
$419,343

This home is -7.2% below the subdivision median.

Tax Analysis

The estimated annual property tax is $7,590 across all districts. With a homestead exemption claimed, that drops to $5,860 — saving $1,730 per year. That's $488 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%$3,474
AustinCity0.5240%$2,038
Williamson CountyCounty0.3694%$1,437
Austin Community Collegespecial0.1034%$402
Williamson County FM/RdCounty0.0443%$172
Upper Brushy Creek WCIDWater0.0170%$66
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$7,590

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $354,921 would pay approximately $2,215 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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