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

11007 OPAL TRL, AUSTIN, TX 78750

AUSTIN, 78750 — williamson County

4 bed2 bath1,087 sqftBuilt 1980

Property at a Glance

This home is estimated between $325,227 and $492,225, with a best estimate of $426,285. That places the property above the R353476G - Anderson Mill median of $407,368, in a neighborhood that appreciated 0.2% over the past year.

Estimated Value Range

$325,227 $492,225
Best Estimate
$426,285
WCAD Value
$501,773
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 $325,227 and $492,225. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

11022 HARD ROCK RD, AUSTIN, TX 78750
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,494 sqft Built 1981
Raw Value $457,648
Adjusted Value $352,724

Adjusted -$101,048 for 407 sqft less living space and -$3,876 for being older. Net adjustment: -$104,924.

11032 HARD ROCK RD, AUSTIN, TX 78750
0.06 mi 100% similar Same subdivision
4 bed 2 bath 1,087 sqft Built 1980
Raw Value $465,623
Adjusted Value $465,623

This comparable closely matches the subject property's features.

11700 QUARTZ CI, AUSTIN, TX 78750
0.07 mi 100% similar Same subdivision
4 bed 2 bath 1,087 sqft Built 1980
Raw Value $464,505
Adjusted Value $426,285

Adjusted -$38,220 for no pool. Net adjustment: -$38,220.

11014 HARD ROCK RD, AUSTIN, TX 78750
0.09 mi 100% similar Same subdivision
4 bed 2 bath 881 sqft Built 1980
Raw Value $441,081
Adjusted Value $492,225

Adjusted +$51,144 for 206 sqft more living space. Net adjustment: +$51,144.

10912 TALL OAK TRL, AUSTIN, TX 78750
0.08 mi 100% similar Same subdivision
3 bed 2 bath 1,610 sqft Built 1981
Raw Value $458,950
Adjusted Value $325,227

Adjusted -$129,847 for 523 sqft less living space and -$3,876 for being older. Net adjustment: -$133,723.

The Neighborhood

This home is valued 23.2% 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
$501,773
Median
$407,368

This home is +23.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,415 across all districts. With a homestead exemption claimed, that drops to $8,546 — saving $1,869 per year. That's $712 per month a buyer should budget. The assessed value increased +6.6% vs the subdivision average of +0.2%. This above-average increase gives a protest opportunity score of 47 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$4,481
AustinCity0.5240%$2,629
Williamson CountyCounty0.3694%$1,854
Anderson Mill Limited Districtspecial0.1243%$624
Austin Community Collegespecial0.1034%$519
Williamson County FM/RdCounty0.0443%$222
Upper Brushy Creek WCIDWater0.0170%$85
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0756%$10,415
47 / 100

Moderate opportunity to protest.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $426,285 would pay approximately $2,661 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