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12004 GREY ROCK LN, AUSTIN, TX 78750

AUSTIN, 78750 — williamson County

3 bed2 bath1,410 sqftBuilt 1977

Property at a Glance

This home is estimated between $289,080 and $385,442, with a best estimate of $323,615. That places the property below the R3P5480G - Anderson Mill 12,16 - 20 - Partially in TCAD median of $387,608, in a neighborhood that declined 7.3% over the past year.

Estimated Value Range

$289,080 $385,442
Best Estimate
$323,615
WCAD Value
$344,616
High Confidence

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

Based on 5 comparable properties in R3P5480G - Anderson Mill 12,16 - 20 - Partially in TCAD, this home's estimated market value is between $289,080 and $385,442. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

12006 GREY ROCK LN, AUSTIN, TX 78750
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,498 sqft Built 1979
Raw Value $355,273
Adjusted Value $323,615

Adjusted -$21,676 for 88 sqft less living space and -$9,982 for being older. Net adjustment: -$31,658.

12002 GREY ROCK LN, AUSTIN, TX 78750
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,747 sqft Built 1977
Raw Value $372,091
Adjusted Value $289,080

Adjusted -$83,011 for 337 sqft less living space. Net adjustment: -$83,011.

12011 ACORN CREEK TRL, AUSTIN, TX 78750
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,587 sqft Built 1979
Raw Value $364,792
Adjusted Value $311,211

Adjusted -$43,599 for 177 sqft less living space and -$9,982 for being older. Net adjustment: -$53,581.

12013 ACORN CREEK TRL, AUSTIN, TX 78750
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,425 sqft Built 1977
Raw Value $349,661
Adjusted Value $345,966

Adjusted -$3,695 for 15 sqft less living space. Net adjustment: -$3,695.

12100 GREY ROCK LN, AUSTIN, TX 78750
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,653 sqft Built 1977
Raw Value $445,298
Adjusted Value $385,442

Adjusted -$59,856 for 243 sqft less living space. Net adjustment: -$59,856.

The Neighborhood

This home is valued 11.1% below the R3P5480G - Anderson Mill 12,16 - 20 - Partially in TCAD median of $387,608. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 7.3% over the past year.

R3P5480G - Anderson Mill 12,16 - 20 - Partially in TCAD

typical
834 Properties
$387,608 Median Value
-7.3% YoY Change
2% Have Pool
97% Have Garage
This Home
$344,616
Median
$387,608

This home is -11.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $7,153 across all districts. With a homestead exemption claimed, that drops to $5,478 — saving $1,675 per year. That's $457 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%$3,078
AustinCity0.5240%$1,806
Williamson CountyCounty0.3694%$1,273
Anderson Mill Limited Districtspecial0.1243%$428
Austin Community Collegespecial0.1034%$356
Williamson County FM/RdCounty0.0443%$153
Upper Brushy Creek WCIDWater0.0170%$59
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0756%$7,153

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $323,615 would pay approximately $2,020 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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