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8420 CAHILL DR, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

4 bed2 bath1,385 sqftBuilt 1997

Property at a Glance

This home is estimated between $146,546 and $662,049, with a best estimate of $596,596. That places the property above 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

$146,546 $662,049
Best Estimate
$596,596
WCAD Value
$658,037
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 $146,546 and $662,049. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

8500 CAHILL DR, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,187 sqft Built 1997
Raw Value $588,874
Adjusted Value $662,049

Adjusted +$73,175 for 198 sqft more living space. Net adjustment: +$73,175.

8416 CAHILL DR, AUSTIN, TX 78729
0.01 mi 100% similar Same subdivision
4 bed 2 bath 1,701 sqft Built 1998
Raw Value $562,190
Adjusted Value $442,708

Adjusted -$116,784 for 316 sqft less living space and -$2,698 for being older. Net adjustment: -$119,482.

8504 CAHILL DR, AUSTIN, TX 78729
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,308 sqft Built 1996
Raw Value $565,441
Adjusted Value $596,596

Adjusted +$28,457 for 77 sqft more living space and +$2,698 for being newer. Net adjustment: +$31,155.

8412 CAHILL DR, AUSTIN, TX 78729
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,082 sqft Built 1998
Raw Value $488,961
Adjusted Value $598,242

Adjusted +$111,979 for 303 sqft more living space and -$2,698 for being older. Net adjustment: +$109,281.

8421 CAHILL DR, AUSTIN, TX 78729
0.03 mi 100% similar Same subdivision
4 bed 2 bath 2,297 sqft Built 1997
Raw Value $483,593
Adjusted Value $146,546

Adjusted -$337,047 for 912 sqft less living space. Net adjustment: -$337,047.

The Neighborhood

This home is valued 34.6% 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

above average
762 Properties
$488,824 Median Value
-2.2% YoY Change
3% Have Pool
100% Have Garage
This Home
$658,037
Median
$488,824

This home is +34.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,840 across all districts. With a homestead exemption claimed, that drops to $10,779 — saving $2,061 per year. That's $898 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%$5,877
AustinCity0.5240%$3,448
Williamson CountyCounty0.3694%$2,431
Austin Community Collegespecial0.1034%$680
Williamson County FM/RdCounty0.0443%$292
Upper Brushy Creek WCIDWater0.0170%$112
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$12,840

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $596,596 would pay approximately $3,724 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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