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

8516 ANDERSON MILL RD, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

3 bed18,300 sqftBuilt 2007

Property at a Glance

This home is estimated between $4,244,463 and $26,656,244, with a best estimate of $4,331,014.

Estimated Value Range

$4,244,463 $26,656,244
Best Estimate
$4,331,014
WCAD Value
$7,401,569
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R45MS - Neighborhood Shop.strip-Lakeline Area. The estimated range of $4,244,463 and $26,656,244 should be treated as a rough guide.

Comparable Properties (5)

3 bed 6,560 sqft Built 1985
Raw Value $23,823,792
Adjusted Value $26,656,244

Adjusted +$2,834,677 for 11,740 sqft more living space and -$2,225 for being older. Net adjustment: +$2,832,452.

3 bed 2 bath 2,328 sqft Built 2014
Raw Value $533,986
Adjusted Value $4,331,014

Adjusted +$3,856,513 for 15,972 sqft more living space and +$708 for being newer and -$60,193 for no garage. Net adjustment: +$3,797,028.

3 bed 4 bath 1,784 sqft Built 2002
Raw Value $406,864
Adjusted Value $4,334,029

Adjusted +$3,987,864 for 16,516 sqft more living space and -$506 for being older and -$60,193 for no garage. Net adjustment: +$3,927,165.

4 bed 4 bath 2,414 sqft Built 2003
Raw Value $483,539
Adjusted Value $4,258,689

Adjusted +$3,835,748 for 15,886 sqft more living space and -$405 for being older and -$60,193 for no garage. Net adjustment: +$3,775,150.

4 bed 4 bath 2,460 sqft Built 2002
Raw Value $480,521
Adjusted Value $4,244,463

Adjusted +$3,824,641 for 15,840 sqft more living space and -$506 for being older and -$60,193 for no garage. Net adjustment: +$3,763,942.

The Neighborhood

Subdivision comparison data is not available for this property.

Tax Analysis

The estimated annual property tax is $144,426 across all districts. With a homestead exemption claimed, that drops to $134,052 — saving $10,374 per year. That's $11,171 per month a buyer should budget. The assessed value increased +25.5%. This increase gives a protest opportunity score of 100 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$66,103
AustinCity0.5240%$38,785
Williamson CountyCounty0.3694%$27,345
Austin Community Collegespecial0.1034%$7,653
Williamson County FM/RdCounty0.0443%$3,281
Upper Brushy Creek WCIDWater0.0170%$1,258
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$144,426
100 / 100

There may be a strong case to protest this appraisal.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $4,331,014 would pay approximately $27,034 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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