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1404 ZEPHYR LN, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

6 bed6 bath2,124 sqftBuilt 2017

Property at a Glance

This home is estimated between $431,438 and $686,316, with a best estimate of $440,260. That places the property above the R450X - Round Rock East - Duplex median of $355,449, in a neighborhood that declined 8.7% over the past year.

Estimated Value Range

$431,438 $686,316
Best Estimate
$440,260
WCAD Value
$641,048
Medium Confidence

Based on 5 comparable properties(3 in the same subdivision)

Based on 5 comparable properties (3 in the same subdivision, 2 nearby), the estimated range is $431,438 and $686,316. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

1408 ZEPHYR LN, ROUND ROCK, TX 78664
0.00 mi 98% similar Same subdivision
5 bed 4 bath 1,607 sqft Built 2015
Raw Value $583,856
Adjusted Value $686,316

Adjusted +$100,460 for 517 sqft more living space and +$2,000 for being newer. Net adjustment: +$102,460.

1316/1318 ZEPHYR LN, ROUND ROCK, TX 78664
0.00 mi 88% similar Same subdivision
3 bed 4 bath 1,971 sqft Built 1986
Raw Value $370,703
Adjusted Value $431,438

Adjusted +$29,730 for 153 sqft more living space and +$31,005 for being newer. Net adjustment: +$60,735.

1312/1314 ZEPHYR LN, ROUND ROCK, TX 78664
0.00 mi 88% similar Same subdivision
3 bed 4 bath 1,971 sqft Built 1986
Raw Value $370,703
Adjusted Value $431,438

Adjusted +$29,730 for 153 sqft more living space and +$31,005 for being newer. Net adjustment: +$60,735.

3 bed 1,775 sqft Built 1986
Raw Value $341,440
Adjusted Value $440,260

Adjusted +$67,815 for 349 sqft more living space and +$31,005 for being newer. Net adjustment: +$98,820.

3 bed 2 bath 1,355 sqft Built 2002
Raw Value $307,804
Adjusted Value $472,233

Adjusted +$149,426 for 769 sqft more living space and +$15,003 for being newer. Net adjustment: +$164,429.

The Neighborhood

This home is valued 80.3% above the R450X - Round Rock East - Duplex median of $355,449. With 836 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.7% over the past year.

R450X - Round Rock East - Duplex

outlier high
836 Properties
$355,449 Median Value
-8.7% YoY Change
0% Have Pool
84% Have Garage
This Home
$641,048
Median
$355,449

This home is +80.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $11,534 across all districts. With a homestead exemption claimed, that drops to $10,165 — saving $1,369 per year. That's $847 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%$5,725
Round RockCity0.3720%$2,385
Williamson CountyCounty0.3694%$2,368
Austin Community Collegespecial0.1034%$663
Williamson County FM/RdCounty0.0443%$284
Upper Brushy Creek WCIDWater0.0170%$109
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$11,534

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $440,260 would pay approximately $2,748 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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