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9521 CASTLE PINES DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed3 bath1,704 sqftBuilt 2004

Property at a Glance

This home is estimated between $349,401 and $755,195, with a best estimate of $679,093. That places the property below the R251501D - Avery Ranch South median of $708,305, in a neighborhood that declined 3.8% over the past year.

Estimated Value Range

$349,401 $755,195
Best Estimate
$679,093
WCAD Value
$644,899
High Confidence

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

Based on 5 comparable properties in R251501D - Avery Ranch South, this home's estimated market value is between $349,401 and $755,195. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

9517 CASTLE PINES DR, AUSTIN, TX 78717
0.01 mi 100% similar Same subdivision
4 bed 3 bath 2,455 sqft Built 2006
Raw Value $615,899
Adjusted Value $349,401

Adjusted -$263,712 for 751 sqft less living space and -$2,786 for being older. Net adjustment: -$266,498.

9513 CASTLE PINES DR, AUSTIN, TX 78717
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,796 sqft Built 2005
Raw Value $746,458
Adjusted Value $712,759

Adjusted -$32,306 for 92 sqft less living space and -$1,393 for being older. Net adjustment: -$33,699.

9533 CASTLE PINES DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
4 bed 2 bath 1,598 sqft Built 2005
Raw Value $719,366
Adjusted Value $755,195

Adjusted +$37,222 for 106 sqft more living space and -$1,393 for being older. Net adjustment: +$35,829.

9520 CASTLE PINES DR, AUSTIN, TX 78717
0.03 mi 100% similar Same subdivision
4 bed 3 bath 1,843 sqft Built 2005
Raw Value $729,295
Adjusted Value $679,093

Adjusted -$48,809 for 139 sqft less living space and -$1,393 for being older. Net adjustment: -$50,202.

9505 CASTLE PINES DR, AUSTIN, TX 78717
0.04 mi 100% similar Same subdivision
4 bed 2 bath 1,874 sqft Built 2005
Raw Value $658,256
Adjusted Value $597,168

Adjusted -$59,695 for 170 sqft less living space and -$1,393 for being older. Net adjustment: -$61,088.

The Neighborhood

This home is valued 9.0% below the R251501D - Avery Ranch South median of $708,305. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 3.8% over the past year.

R251501D - Avery Ranch South

typical
635 Properties
$708,305 Median Value
-3.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$644,899
Median
$708,305

This home is -9.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $12,584 across all districts. With a homestead exemption claimed, that drops to $10,539 — saving $2,045 per year. That's $878 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%$5,760
AustinCity0.5240%$3,379
Williamson CountyCounty0.3694%$2,383
Austin Community Collegespecial0.1034%$667
Williamson County FM/RdCounty0.0443%$286
Upper Brushy Creek WCIDWater0.0170%$110
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$12,584

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $679,093 would pay approximately $4,239 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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