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428 HIGHLAND HORIZON, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed2 bath2,372 sqftBuilt 2010

Property at a Glance

This home is estimated between $570,838 and $944,954, with a best estimate of $884,157. 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

$570,838 $944,954
Best Estimate
$884,157
WCAD Value
$658,269
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 $570,838 and $944,954. 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 $944,954

Adjusted +$31,551 for 102 sqft more living space. Net adjustment: +$31,551.

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 $677,515

Adjusted +$90,632 for 293 sqft more living space. Net adjustment: +$90,632.

209 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,625 sqft Built 2010
Raw Value $653,092
Adjusted Value $884,157

Adjusted +$231,065 for 747 sqft more living space. Net adjustment: +$231,065.

441 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,077 sqft Built 2009
Raw Value $831,304
Adjusted Value $934,992

Adjusted +$91,251 for 295 sqft more living space and +$12,437 for being newer. Net adjustment: +$103,688.

421 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 2 bath 3,295 sqft Built 2009
Raw Value $843,907
Adjusted Value $570,838

Adjusted -$285,506 for 923 sqft less living space and +$12,437 for being newer. Net adjustment: -$273,069.

The Neighborhood

This home is valued 15.8% below the R302609C - HIGHLAND HORIZON median of $781,434. That positions it competitively for buyers comparing within the neighborhood. The neighborhood appreciated 2.3% over the past year.

R302609C - HIGHLAND HORIZON

below average
399 Properties
$781,434 Median Value
+2.3% YoY Change
0% Have Pool
100% Have Garage
This Home
$658,269
Median
$781,434

This home is -15.8% below the subdivision median.

Tax Analysis

The estimated annual property tax is $13,192 across all districts. With a homestead exemption claimed, that drops to $11,821 — saving $1,371 per year. That's $985 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%$5,879
Brushy Creek MUDMUD0.3868%$2,546
Williamson CountyCounty0.3694%$2,432
Austin Community Collegespecial0.1034%$681
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$658
Brushy Creek MUD Defined AreaMUD0.0900%$592
Williamson County FM/RdCounty0.0443%$292
Upper Brushy Creek WCIDWater0.0170%$112
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0041%$13,192

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $884,157 would pay approximately $5,519 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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