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1403 S MAYS ST, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2,512 sqftBuilt 1977

Property at a Glance

This home is estimated between $548,095 and $2,080,653, with a best estimate of $1,047,815. 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

$548,095 $2,080,653
Best Estimate
$1,047,815
WCAD Value
$576,307
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R450X - Round Rock East - Duplex. The estimated range of $548,095 and $2,080,653 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,563 sqft Built 1975
Raw Value $403,479
Adjusted Value $548,095

Adjusted +$184,403 for 949 sqft more living space and +$2,000 for being newer and -$41,787 for no garage. Net adjustment: +$144,616.

3 bed 1,892 sqft Built 1965
Raw Value $739,137
Adjusted Value $871,613

Adjusted +$120,474 for 620 sqft more living space and +$12,002 for being newer. Net adjustment: +$132,476.

3 bed 1,100 sqft Built 1980
Raw Value $1,102,300
Adjusted Value $1,373,668

Adjusted +$274,369 for 1,412 sqft more living space and -$3,001 for being older. Net adjustment: +$271,368.

3 bed 5,267 sqft Built 1986
Raw Value $1,592,148
Adjusted Value $1,047,815

Adjusted -$535,331 for 2,755 sqft less living space and -$9,002 for being older. Net adjustment: -$544,333.

3 bed 2,928 sqft Built 2023
Raw Value $2,207,495
Adjusted Value $2,080,653

Adjusted -$80,834 for 416 sqft less living space and -$46,008 for being older. Net adjustment: -$126,842.

The Neighborhood

This home is valued 62.1% 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
$576,307
Median
$355,449

This home is +62.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,369 across all districts. With a homestead exemption claimed, that drops to $9,013 — saving $1,356 per year. That's $751 per month a buyer should budget. The assessed value increased +0.3% vs the subdivision average of -8.7%. This above-average increase gives a protest opportunity score of 45 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$5,147
Round RockCity0.3720%$2,144
Williamson CountyCounty0.3694%$2,129
Austin Community Collegespecial0.1034%$596
Williamson County FM/RdCounty0.0443%$255
Upper Brushy Creek WCIDWater0.0170%$98
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,369
45 / 100

Moderate opportunity to protest.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $1,047,815 would pay approximately $6,540 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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