Beta Williamson County, TX only — data and coverage are limited during early access.

10904 OPAL TRL, AUSTIN, TX 78750

AUSTIN, 78750 — williamson County

4 bed2 bath1,476 sqftBuilt 1980

Property at a Glance

This home is estimated between $307,272 and $568,730, with a best estimate of $390,388. That places the property below the R353476G - Anderson Mill median of $407,368, in a neighborhood that appreciated 0.2% over the past year.

Estimated Value Range

$307,272 $568,730
Best Estimate
$390,388
WCAD Value
$510,878
High Confidence

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

Based on 5 comparable properties in R353476G - Anderson Mill, this home's estimated market value is between $307,272 and $568,730. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

10902 OPAL TRL, AUSTIN, TX 78750
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,000 sqft Built 1980
Raw Value $532,503
Adjusted Value $402,407

Adjusted -$130,096 for 524 sqft less living space. Net adjustment: -$130,096.

10906 OPAL TRL, AUSTIN, TX 78750
0.02 mi 100% similar Same subdivision
3 bed 2 bath 2,054 sqft Built 1980
Raw Value $478,625
Adjusted Value $335,123

Adjusted -$143,502 for 578 sqft less living space. Net adjustment: -$143,502.

10903 OPAL TRL, AUSTIN, TX 78750
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,586 sqft Built 1980
Raw Value $596,040
Adjusted Value $568,730

Adjusted -$27,310 for 110 sqft less living space. Net adjustment: -$27,310.

10900 OPAL TRL, AUSTIN, TX 78750
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,680 sqft Built 1980
Raw Value $441,036
Adjusted Value $390,388

Adjusted -$50,648 for 204 sqft less living space. Net adjustment: -$50,648.

11000 OPAL TRL, AUSTIN, TX 78750
0.04 mi 100% similar Same subdivision
3 bed 2 bath 1,802 sqft Built 1980
Raw Value $388,209
Adjusted Value $307,272

Adjusted -$80,937 for 326 sqft less living space. Net adjustment: -$80,937.

The Neighborhood

This home is valued 25.4% above the R353476G - Anderson Mill median of $407,368. With 1,663 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 0.2% over the past year.

R353476G - Anderson Mill

above average
1,663 Properties
$407,368 Median Value
+0.2% YoY Change
3% Have Pool
95% Have Garage
This Home
$510,878
Median
$407,368

This home is +25.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,604 across all districts. With a homestead exemption claimed, that drops to $8,724 — saving $1,880 per year. That's $727 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%$4,563
AustinCity0.5240%$2,677
Williamson CountyCounty0.3694%$1,887
Anderson Mill Limited Districtspecial0.1243%$635
Austin Community Collegespecial0.1034%$528
Williamson County FM/RdCounty0.0443%$226
Upper Brushy Creek WCIDWater0.0170%$87
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0756%$10,604

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $390,388 would pay approximately $2,437 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.

View full property details