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1521 SAM BASS RD, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

2 bed2 bath1,456 sqftBuilt 1945

Property at a Glance

This home is estimated between $-26,127 and $736,391, with a best estimate of $536,499. That places the property above the R701575F - OLD TOWN ROUND ROCK median of $319,256, in a neighborhood that appreciated 4.3% over the past year.

Estimated Value Range

$-26,127 $736,391
Best Estimate
$536,499
WCAD Value
$476,801
Low Confidence

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

There are 5 comparable properties within range, but none are in R701575F - OLD TOWN ROUND ROCK. The estimated range of $-26,127 and $736,391 should be treated as a rough guide.

Comparable Properties (5)

4 bed 2 bath 1,364 sqft Built 1977
Raw Value $736,252
Adjusted Value $536,499

Adjusted +$23,622 for 92 sqft more living space and -$98,955 for being older and -$124,420 for no garage. Net adjustment: -$199,753.

3 bed 2 bath 1,938 sqft Built 1971
Raw Value $670,001
Adjusted Value $341,421

Adjusted -$123,759 for 482 sqft less living space and -$80,401 for being older and -$124,420 for no garage. Net adjustment: -$328,580.

3 bed 2 bath 1,756 sqft Built 1980
Raw Value $868,751
Adjusted Value $683,491

Adjusted -$77,028 for 300 sqft less living space and -$108,232 for being older. Net adjustment: -$185,260.

3 bed 2 bath 2,103 sqft Built 1970
Raw Value $1,104,243
Adjusted Value $736,391

Adjusted -$166,124 for 647 sqft less living space and -$77,308 for being older and -$124,420 for no garage. Net adjustment: -$367,852.

2 bed 2 bath 2,004 sqft Built 2016
Raw Value $458,554
Adjusted Value $-26,127

Adjusted -$140,705 for 548 sqft less living space and -$219,556 for being older and -$124,420 for no garage. Net adjustment: -$484,681.

The Neighborhood

This home is valued 49.3% above the R701575F - OLD TOWN ROUND ROCK median of $319,256. With 360 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 4.3% over the past year.

R701575F - OLD TOWN ROUND ROCK

above average
360 Properties
$319,256 Median Value
+4.3% YoY Change
5% Have Pool
24% Have Garage
This Home
$476,801
Median
$319,256

This home is +49.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,159 across all districts. With a homestead exemption claimed, that drops to $4,846 — saving $1,313 per year. That's $404 per month a buyer should budget. The assessed value increased +67.1% vs the subdivision average of +4.3%. 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%$3,057
Round RockCity0.3720%$1,273
Williamson CountyCounty0.3694%$1,265
Austin Community Collegespecial0.1034%$354
Williamson County FM/RdCounty0.0443%$152
Upper Brushy Creek WCIDWater0.0170%$58
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,159
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 $536,499 would pay approximately $3,349 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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