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503 OLD WEST DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed3 bath1,776 sqftBuilt 1982

Property at a Glance

This home is estimated between $343,287 and $753,259, with a best estimate of $393,214. That places the property below 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

$343,287 $753,259
Best Estimate
$393,214
WCAD Value
$392,965
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 $343,287 and $753,259 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,775 sqft Built 1977
Raw Value $365,812
Adjusted Value $358,673

Adjusted +$203 for 1 sqft more living space and +$12,524 for being newer and -$19,866 for no garage. Net adjustment: -$7,139.

3 bed 2 bath 1,888 sqft Built 1981
Raw Value $773,527
Adjusted Value $753,259

Adjusted -$22,773 for 112 sqft less living space and +$2,505 for being newer. Net adjustment: -$20,268.

3 bed 2 bath 1,924 sqft Built 1981
Raw Value $390,741
Adjusted Value $343,287

Adjusted -$30,093 for 148 sqft less living space and +$2,505 for being newer and -$19,866 for no garage. Net adjustment: -$47,454.

3 bed 2 bath 1,797 sqft Built 1975
Raw Value $589,604
Adjusted Value $583,002

Adjusted -$4,270 for 21 sqft less living space and +$17,534 for being newer and -$19,866 for no garage. Net adjustment: -$6,602.

3 bed 2 bath 1,655 sqft Built 1979
Raw Value $380,963
Adjusted Value $393,214

Adjusted +$24,603 for 121 sqft more living space and +$7,514 for being newer and -$19,866 for no garage. Net adjustment: +$12,251.

The Neighborhood

This home is valued 9.6% below the R120X - Round Rock West Above 45 - Duplex median of $434,714. That positions it competitively for buyers comparing within the neighborhood. 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
$392,965
Median
$434,714

This home is -9.6% below the subdivision median.

Tax Analysis

The estimated annual property tax is $6,656 across all districts. With a homestead exemption claimed, that drops to $5,337 — saving $1,319 per year. That's $445 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%$3,304
Round RockCity0.3720%$1,376
Williamson CountyCounty0.3694%$1,367
Austin Community Collegespecial0.1034%$382
Williamson County FM/RdCounty0.0443%$164
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,656

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $393,214 would pay approximately $2,454 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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