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1503 SAINT WILLIAMS LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath2,161 sqftBuilt 1977

Property at a Glance

This home is estimated between $457,870 and $740,474, with a best estimate of $526,210. That places the property above the R325576F - ROUND ROCK WEST/LAKE CREEK WEST/SHADOW BROOK median of $476,515, in a neighborhood that declined 5.9% over the past year.

Estimated Value Range

$457,870 $740,474
Best Estimate
$526,210
WCAD Value
$429,224
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $457,870 and $740,474. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

1616 SAINT WILLIAMS LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,223 sqft Built 1977
Raw Value $518,065
Adjusted Value $503,347

Adjusted -$14,718 for 62 sqft less living space. Net adjustment: -$14,718.

1604 SAINT WILLIAMS LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,490 sqft Built 1977
Raw Value $581,189
Adjusted Value $740,474

Adjusted +$159,285 for 671 sqft more living space. Net adjustment: +$159,285.

1613 SAINT WILLIAMS LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,066 sqft Built 1977
Raw Value $613,071
Adjusted Value $635,623

Adjusted +$22,552 for 95 sqft more living space. Net adjustment: +$22,552.

1609 SAINT WILLIAMS LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,271 sqft Built 1980
Raw Value $491,083
Adjusted Value $457,870

Adjusted -$26,112 for 110 sqft less living space and -$7,101 for being older. Net adjustment: -$33,213.

3 bed 2 bath 2,195 sqft Built 2004
Raw Value $598,191
Adjusted Value $526,210

Adjusted -$8,071 for 34 sqft less living space and -$63,910 for being older. Net adjustment: -$71,981.

The Neighborhood

This home is valued 9.9% below the R325576F - ROUND ROCK WEST/LAKE CREEK WEST/SHADOW BROOK median of $476,515. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 5.9% over the past year.

R325576F - ROUND ROCK WEST/LAKE CREEK WEST/SHADOW BROOK

typical
822 Properties
$476,515 Median Value
-5.9% YoY Change
5% Have Pool
96% Have Garage
This Home
$429,224
Median
$476,515

This home is -9.9% below the subdivision median.

Tax Analysis

The estimated annual property tax is $7,723 across all districts. With a homestead exemption claimed, that drops to $6,393 — saving $1,330 per year. That's $533 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%$3,833
Round RockCity0.3720%$1,597
Williamson CountyCounty0.3694%$1,586
Austin Community Collegespecial0.1034%$444
Williamson County FM/RdCounty0.0443%$190
Upper Brushy Creek WCIDWater0.0170%$73
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$7,723

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $526,210 would pay approximately $3,285 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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