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421 HIGHLAND HORIZON, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed2 bath3,295 sqftBuilt 2009

Property at a Glance

This home is estimated between $856,142 and $1,218,023, with a best estimate of $950,584. That places the property above the R302609C - HIGHLAND HORIZON median of $781,434, in a neighborhood that appreciated 2.3% over the past year.

Estimated Value Range

$856,142 $1,218,023
Best Estimate
$950,584
WCAD Value
$843,907
High Confidence

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

Based on 5 comparable properties in R302609C - HIGHLAND HORIZON, this home's estimated market value is between $856,142 and $1,218,023. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

440 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,270 sqft Built 2010
Raw Value $913,403
Adjusted Value $1,218,023

Adjusted +$317,057 for 1,025 sqft more living space and -$12,437 for being older. Net adjustment: +$304,620.

400 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,874 sqft Built 2012
Raw Value $878,051
Adjusted Value $970,966

Adjusted +$130,226 for 421 sqft more living space and -$37,311 for being older. Net adjustment: +$92,915.

204 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,079 sqft Built 2010
Raw Value $586,883
Adjusted Value $950,584

Adjusted +$376,138 for 1,216 sqft more living space and -$12,437 for being older. Net adjustment: +$363,701.

405 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 3 bath 2,955 sqft Built 2009
Raw Value $821,367
Adjusted Value $926,537

Adjusted +$105,170 for 340 sqft more living space. Net adjustment: +$105,170.

413 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 2 bath 3,018 sqft Built 2010
Raw Value $782,896
Adjusted Value $856,142

Adjusted +$85,683 for 277 sqft more living space and -$12,437 for being older. Net adjustment: +$73,246.

The Neighborhood

This home is valued 8.0% above the R302609C - HIGHLAND HORIZON median of $781,434. With 399 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 2.3% over the past year.

R302609C - HIGHLAND HORIZON

typical
399 Properties
$781,434 Median Value
+2.3% YoY Change
0% Have Pool
100% Have Garage
This Home
$843,907
Median
$781,434

This home is +8.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $16,913 across all districts. With a homestead exemption claimed, that drops to $15,507 — saving $1,406 per year. That's $1,292 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%$7,537
Brushy Creek MUDMUD0.3868%$3,265
Williamson CountyCounty0.3694%$3,118
Austin Community Collegespecial0.1034%$873
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$844
Brushy Creek MUD Defined AreaMUD0.0900%$760
Williamson County FM/RdCounty0.0443%$374
Upper Brushy Creek WCIDWater0.0170%$143
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0041%$16,913

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $950,584 would pay approximately $5,934 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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