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8421 CAHILL DR, AUSTIN, TX 78729

AUSTIN, 78729 — williamson County

4 bed2 bath2,297 sqftBuilt 1997

Property at a Glance

This home is estimated between $646,945 and $995,084, with a best estimate of $662,691. 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

$646,945 $995,084
Best Estimate
$662,691
WCAD Value
$483,593
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 $646,945 and $995,084. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

8413 CAHILL DR, AUSTIN, TX 78729
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,923 sqft Built 2000
Raw Value $532,565
Adjusted Value $662,691

Adjusted +$138,219 for 374 sqft more living space and -$8,093 for being older. Net adjustment: +$130,126.

8420 CAHILL DR, AUSTIN, TX 78729
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,385 sqft Built 1997
Raw Value $658,037
Adjusted Value $995,084

Adjusted +$337,047 for 912 sqft more living space. Net adjustment: +$337,047.

8416 CAHILL DR, AUSTIN, TX 78729
0.04 mi 100% similar Same subdivision
4 bed 2 bath 1,701 sqft Built 1998
Raw Value $562,190
Adjusted Value $779,755

Adjusted +$220,263 for 596 sqft more living space and -$2,698 for being older. Net adjustment: +$217,565.

8509 CAHILL DR, AUSTIN, TX 78729
0.04 mi 100% similar Same subdivision
3 bed 2 bath 1,929 sqft Built 2002
Raw Value $524,432
Adjusted Value $646,945

Adjusted +$136,001 for 368 sqft more living space and -$13,488 for being older. Net adjustment: +$122,513.

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 $648,743

Adjusted +$138,219 for 374 sqft more living space and -$10,790 for being older. Net adjustment: +$127,429.

The Neighborhood

This home is valued 1.1% below the R381591E - Hunters' Chase Sec 5 & 7 median of $488,824. That positions it competitively for buyers comparing within the neighborhood. 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
$483,593
Median
$488,824

This home is -1.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $9,436 across all districts. With a homestead exemption claimed, that drops to $7,590 — saving $1,846 per year. That's $633 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%$4,319
AustinCity0.5240%$2,534
Williamson CountyCounty0.3694%$1,787
Austin Community Collegespecial0.1034%$500
Williamson County FM/RdCounty0.0443%$214
Upper Brushy Creek WCIDWater0.0170%$82
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$9,436

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $662,691 would pay approximately $4,136 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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