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

8400 CAHILL DR, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

4 bed2 bath1,636 sqftBuilt 2001

Property at a Glance

This home is estimated between $393,150 and $783,756, with a best estimate of $429,197. That places the property below the R381591E - Hunters' Chase Sec 5 & 7 median of $488,824, in a neighborhood that declined 2.2% over the past year.

Estimated Value Range

$393,150 $783,756
Best Estimate
$429,197
WCAD Value
$546,918
High Confidence

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

Based on 5 comparable properties in R381591E - Hunters' Chase Sec 5 & 7, this home's estimated market value is between $393,150 and $783,756. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

8404 CAHILL DR, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,201 sqft Built 2001
Raw Value $622,994
Adjusted Value $783,756

Adjusted +$160,762 for 435 sqft more living space. Net adjustment: +$160,762.

8405 CAHILL DR, AUSTIN, TX 78729
0.04 mi 100% similar Same subdivision
3 bed 2 bath 1,987 sqft Built 1999
Raw Value $517,474
Adjusted Value $393,150

Adjusted -$129,719 for 351 sqft less living space and +$5,395 for being newer. Net adjustment: -$124,324.

8409 CAHILL DR, AUSTIN, TX 78729
0.04 mi 100% similar Same subdivision
3 bed 2 bath 1,923 sqft Built 2001
Raw Value $521,314
Adjusted Value $415,248

Adjusted -$106,066 for 287 sqft less living space. Net adjustment: -$106,066.

8413 CAHILL DR, AUSTIN, TX 78729
0.05 mi 100% similar Same subdivision
3 bed 2 bath 1,923 sqft Built 2000
Raw Value $532,565
Adjusted Value $429,197

Adjusted -$106,066 for 287 sqft less living space and +$2,698 for being newer. Net adjustment: -$103,368.

8416 CAHILL DR, AUSTIN, TX 78729
0.05 mi 100% similar Same subdivision
4 bed 2 bath 1,701 sqft Built 1998
Raw Value $562,190
Adjusted Value $546,261

Adjusted -$24,022 for 65 sqft less living space and +$8,093 for being newer. Net adjustment: -$15,929.

The Neighborhood

This home is valued 11.9% above the R381591E - Hunters' Chase Sec 5 & 7 median of $488,824. With 762 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 2.2% over the past year.

R381591E - Hunters' Chase Sec 5 & 7

typical
762 Properties
$488,824 Median Value
-2.2% YoY Change
3% Have Pool
100% Have Garage
This Home
$546,918
Median
$488,824

This home is +11.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,672 across all districts. With a homestead exemption claimed, that drops to $8,747 — saving $1,925 per year. That's $729 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%$4,885
AustinCity0.5240%$2,866
Williamson CountyCounty0.3694%$2,021
Austin Community Collegespecial0.1034%$566
Williamson County FM/RdCounty0.0443%$242
Upper Brushy Creek WCIDWater0.0170%$93
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$10,672

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $429,197 would pay approximately $2,679 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