Beta Williamson County, TX only — data and coverage are limited during early access.

506 SHEPPARD ST N, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath2,165 sqftBuilt 1965

Property at a Glance

This home is estimated between $348,889 and $942,170, with a best estimate of $557,330. That places the property above the R703T14G - Round Rock Historical median of $404,269, in a neighborhood that appreciated 33.1% over the past year.

Estimated Value Range

$348,889 $942,170
Best Estimate
$557,330
WCAD Value
$571,833
Low Confidence

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

There are 5 comparable properties within range, but none are in R703T14G - Round Rock Historical. The estimated range of $348,889 and $942,170 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 2,140 sqft Built 1960
Raw Value $686,434
Adjusted Value $557,330

Adjusted +$7,877 for 25 sqft more living space and -$29,455 for being older and -$107,526 for no garage. Net adjustment: -$129,104.

3 bed 2 bath 1,627 sqft Built 1960
Raw Value $802,113
Adjusted Value $942,170

Adjusted +$169,512 for 538 sqft more living space and -$29,455 for being older. Net adjustment: +$140,057.

3 bed 1 bath 1,936 sqft Built 1950
Raw Value $365,100
Adjusted Value $348,889

Adjusted +$72,153 for 229 sqft more living space and -$88,364 for being older. Net adjustment: -$16,211.

3 bed 2 bath 1,444 sqft Built 1984
Raw Value $341,429
Adjusted Value $680,528

Adjusted +$227,171 for 721 sqft more living space and +$111,928 for being newer. Net adjustment: +$339,099.

3 bed 2 bath 1,880 sqft Built 1977
Raw Value $317,049
Adjusted Value $477,537

Adjusted +$89,797 for 285 sqft more living space and +$70,691 for being newer. Net adjustment: +$160,488.

The Neighborhood

This home is valued 41.4% above the R703T14G - Round Rock Historical median of $404,269. With 59 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 33.1% over the past year.

R703T14G - Round Rock Historical

above average
59 Properties
$404,269 Median Value
+33.1% YoY Change
9% Have Pool
14% Have Garage
This Home
$571,833
Median
$404,269

This home is +41.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $7,372 across all districts. With a homestead exemption claimed, that drops to $6,046 — saving $1,326 per year. That's $504 per month a buyer should budget. The assessed value increased +67.5% vs the subdivision average of +33.1%. This above-average increase gives a protest opportunity score of 100 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$3,659
Round RockCity0.3720%$1,524
Williamson CountyCounty0.3694%$1,514
Austin Community Collegespecial0.1034%$424
Williamson County FM/RdCounty0.0443%$182
Upper Brushy Creek WCIDWater0.0170%$70
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$7,372
100 / 100

There may be a strong case to protest this appraisal.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $557,330 would pay approximately $3,479 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.

View full property details