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312 HIGHLAND HORIZON, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

5 bed4 bath2,916 sqftBuilt 2009

Property at a Glance

This home is estimated between $805,725 and $925,217, with a best estimate of $853,732. 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

$805,725 $925,217
Best Estimate
$853,732
WCAD Value
$923,621
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 $805,725 and $925,217. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

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 $853,732

Adjusted +$12,992 for 42 sqft more living space and -$37,311 for being older. Net adjustment: -$24,319.

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 $809,303

Adjusted -$12,064 for 39 sqft less living space. Net adjustment: -$12,064.

409 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,860 sqft Built 2010
Raw Value $882,030
Adjusted Value $886,915

Adjusted +$17,322 for 56 sqft more living space and -$12,437 for being older. Net adjustment: +$4,885.

425 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,863 sqft Built 2009
Raw Value $908,823
Adjusted Value $925,217

Adjusted +$16,394 for 53 sqft more living space. Net adjustment: +$16,394.

401 HIGHLAND HORIZON, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
4 bed 2 bath 3,148 sqft Built 2011
Raw Value $902,362
Adjusted Value $805,725

Adjusted -$71,763 for 232 sqft less living space and -$24,874 for being older. Net adjustment: -$96,637.

The Neighborhood

This home is valued 18.2% 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

above average
399 Properties
$781,434 Median Value
+2.3% YoY Change
0% Have Pool
100% Have Garage
This Home
$923,621
Median
$781,434

This home is +18.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $18,510 across all districts. With a homestead exemption claimed, that drops to $17,089 — saving $1,421 per year. That's $1,424 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%$8,249
Brushy Creek MUDMUD0.3868%$3,573
Williamson CountyCounty0.3694%$3,412
Austin Community Collegespecial0.1034%$955
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$924
Brushy Creek MUD Defined AreaMUD0.0900%$831
Williamson County FM/RdCounty0.0443%$409
Upper Brushy Creek WCIDWater0.0170%$157
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0041%$18,510

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $853,732 would pay approximately $5,329 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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