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500 OLD WEST DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,241 sqftBuilt 1982

Property at a Glance

This home is estimated between $420,179 and $865,214, with a best estimate of $528,693. That places the property above the R120X - Round Rock West Above 45 - Duplex median of $434,714, in a neighborhood that declined 1.8% over the past year.

Estimated Value Range

$420,179 $865,214
Best Estimate
$528,693
WCAD Value
$478,345
Low Confidence

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

There are 5 comparable properties within range, but none are in R120X - Round Rock West Above 45 - Duplex. The estimated range of $420,179 and $865,214 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 2,377 sqft Built 1996
Raw Value $482,899
Adjusted Value $420,179

Adjusted -$27,653 for 136 sqft less living space and -$35,067 for being older. Net adjustment: -$62,720.

4 bed 3 bath 2,953 sqft Built 1983
Raw Value $662,662
Adjusted Value $515,387

Adjusted -$144,770 for 712 sqft less living space and -$2,505 for being older. Net adjustment: -$147,275.

4 bed 2 bath 1,951 sqft Built 1983
Raw Value $689,293
Adjusted Value $745,753

Adjusted +$58,965 for 290 sqft more living space and -$2,505 for being older. Net adjustment: +$56,460.

3 bed 2 bath 2,263 sqft Built 1978
Raw Value $523,147
Adjusted Value $528,693

Adjusted -$4,473 for 22 sqft less living space and +$10,019 for being newer. Net adjustment: +$5,546.

4 bed 2 bath 1,862 sqft Built 1981
Raw Value $785,648
Adjusted Value $865,214

Adjusted +$77,061 for 379 sqft more living space and +$2,505 for being newer. Net adjustment: +$79,566.

The Neighborhood

This home is valued 10.0% above the R120X - Round Rock West Above 45 - Duplex median of $434,714. With 295 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 1.8% over the past year.

R120X - Round Rock West Above 45 - Duplex

typical
295 Properties
$434,714 Median Value
-1.8% YoY Change
0% Have Pool
84% Have Garage
This Home
$478,345
Median
$434,714

This home is +10.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,607 across all districts. With a homestead exemption claimed, that drops to $7,268 — saving $1,339 per year. That's $606 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%$4,272
Round RockCity0.3720%$1,779
Williamson CountyCounty0.3694%$1,767
Austin Community Collegespecial0.1034%$495
Williamson County FM/RdCounty0.0443%$212
Upper Brushy Creek WCIDWater0.0170%$81
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,607

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $528,693 would pay approximately $3,300 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 4/19/2026.

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