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4000 ISABELLA GRACE CT, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed3 bath1,302 sqftBuilt 2015

Property at a Glance

This home is estimated between $547,570 and $620,637, with a best estimate of $566,916. That places the property above the R303513C - Enclave at Highland Horizon median of $555,714, in a neighborhood that declined 8.5% over the past year.

Estimated Value Range

$547,570 $620,637
Best Estimate
$566,916
WCAD Value
$554,657
High Confidence

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

Based on 5 comparable properties in R303513C - Enclave at Highland Horizon, this home's estimated market value is between $547,570 and $620,637. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

4001 ISABELLA GRACE CT, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,229 sqft Built 2017
Raw Value $593,803
Adjusted Value $585,119

Adjusted +$30,427 for 73 sqft more living space and -$39,111 for being older. Net adjustment: -$8,684.

4005 ISABELLA GRACE CT, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,321 sqft Built 2016
Raw Value $587,058
Adjusted Value $559,583

Adjusted -$7,919 for 19 sqft less living space and -$19,556 for being older. Net adjustment: -$27,475.

4004 ISABELLA GRACE CT, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,224 sqft Built 2016
Raw Value $607,682
Adjusted Value $620,637

Adjusted +$32,511 for 78 sqft more living space and -$19,556 for being older. Net adjustment: +$12,955.

1509 SARAH CHRISTINE LN, AUSTIN, TX 78717
0.49 mi 100% similar Same subdivision
4 bed 2 bath 1,344 sqft Built 2015
Raw Value $584,422
Adjusted Value $566,916

Adjusted -$17,506 for 42 sqft less living space. Net adjustment: -$17,506.

1508 SARAH CHRISTINE LN, AUSTIN, TX 78717
0.52 mi 100% similar Same subdivision
4 bed 2 bath 1,347 sqft Built 2016
Raw Value $585,883
Adjusted Value $547,570

Adjusted -$18,757 for 45 sqft less living space and -$19,556 for being older. Net adjustment: -$38,313.

The Neighborhood

This home is in line with the R303513C - Enclave at Highland Horizon median of $555,714. Note that values in this subdivision declined 8.5% over the past year.

R303513C - Enclave at Highland Horizon

typical
126 Properties
$555,714 Median Value
-8.5% YoY Change
0% Have Pool
100% Have Garage
This Home
$554,657
Median
$555,714

This home is -0.2% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,116 across all districts. With a homestead exemption claimed, that drops to $9,763 — saving $1,353 per year. That's $814 per month a buyer should budget. The assessed value increased -1.5% vs the subdivision average of -8.5%. This above-average increase gives a protest opportunity score of 35 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$4,954
Brushy Creek MUDMUD0.3868%$2,146
Williamson CountyCounty0.3694%$2,049
Austin Community Collegespecial0.1034%$574
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$555
Brushy Creek MUD Defined AreaMUD0.0900%$499
Williamson County FM/RdCounty0.0443%$246
Upper Brushy Creek WCIDWater0.0170%$94
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0041%$11,116
35 / 100

Some opportunity.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $566,916 would pay approximately $3,539 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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