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505 LAMPASAS ST, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

2 bed1 bath936 sqftBuilt 1970

Property at a Glance

This home is estimated between $221,342 and $432,688, with a best estimate of $296,732. That places the property below the R701575F - OLD TOWN ROUND ROCK median of $319,256, in a neighborhood that appreciated 4.3% over the past year.

Estimated Value Range

$221,342 $432,688
Best Estimate
$296,732
WCAD Value
$328,300
High Confidence

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

Based on 5 comparable properties in R701575F - OLD TOWN ROUND ROCK, this home's estimated market value is between $221,342 and $432,688. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

411 BELLVIEW AVE, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
2 bed 1 bath 818 sqft Built 1975
Raw Value $206,506
Adjusted Value $221,342

Adjusted +$30,298 for 118 sqft more living space and -$15,462 for being older. Net adjustment: +$14,836.

307 MILAM AVE E, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
2 bed 1 bath 816 sqft Built 1955
Raw Value $200,679
Adjusted Value $277,875

Adjusted +$30,811 for 120 sqft more living space and +$46,385 for being newer. Net adjustment: +$77,196.

511 PECAN AVE, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
2 bed 1 bath 890 sqft Built 1960
Raw Value $253,998
Adjusted Value $296,732

Adjusted +$11,811 for 46 sqft more living space and +$30,923 for being newer. Net adjustment: +$42,734.

107 ANDERSON AVE E, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
2 bed 1 bath 999 sqft Built 1960
Raw Value $417,941
Adjusted Value $432,688

Adjusted -$16,176 for 63 sqft less living space and +$30,923 for being newer. Net adjustment: +$14,747.

409 MILAM AVE, ROUND ROCK, TX 78664
0.00 mi 90% similar Same subdivision
2 bed 1 bath 576 sqft Built 1955
Raw Value $180,169
Adjusted Value $318,988

Adjusted +$92,434 for 360 sqft more living space and +$46,385 for being newer. Net adjustment: +$138,819.

The Neighborhood

This home is valued 2.8% 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

typical
360 Properties
$319,256 Median Value
+4.3% YoY Change
5% Have Pool
24% Have Garage
This Home
$328,300
Median
$319,256

This home is +2.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $5,907 across all districts. With a homestead exemption claimed, that drops to $4,596 — saving $1,311 per year. That's $383 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%$2,932
Round RockCity0.3720%$1,221
Williamson CountyCounty0.3694%$1,213
Austin Community Collegespecial0.1034%$339
Williamson County FM/RdCounty0.0443%$146
Upper Brushy Creek WCIDWater0.0170%$56
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,907

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $296,732 would pay approximately $1,852 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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