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605 LEWIS ST N, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed1 bath1,598 sqftBuilt 1940

Property at a Glance

This home is estimated between $247,392 and $732,820, with a best estimate of $306,865. 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

$247,392 $732,820
Best Estimate
$306,865
WCAD Value
$508,047
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 $247,392 and $732,820. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

611 LEWIS ST N, ROUND ROCK, TX 78664
0.00 mi 99% similar Same subdivision
2 bed 1 bath 1,138 sqft Built 1940
Raw Value $310,984
Adjusted Value $429,094

Adjusted +$118,110 for 460 sqft more living space. Net adjustment: +$118,110.

307 BLACK ST N, ROUND ROCK, TX 78664
0.00 mi 96% similar Same subdivision
2 bed 2 bath 1,750 sqft Built 1940
Raw Value $417,021
Adjusted Value $253,573

Adjusted -$39,028 for 152 sqft less living space and -$124,420 for no garage. Net adjustment: -$163,448.

404 GEORGETOWN ST N, ROUND ROCK, TX 78664
0.00 mi 96% similar Same subdivision
1 bed 1 bath 1,386 sqft Built 1940
Raw Value $376,852
Adjusted Value $306,865

Adjusted +$54,433 for 212 sqft more living space and -$124,420 for no garage. Net adjustment: -$69,987.

509 LEWIS ST N, ROUND ROCK, TX 78664
0.00 mi 96% similar Same subdivision
3 bed 1 bath 1,936 sqft Built 1950
Raw Value $365,100
Adjusted Value $247,392

Adjusted -$86,785 for 338 sqft less living space and -$30,923 for being older. Net adjustment: -$117,708.

302 BROWN ST N, ROUND ROCK, TX 78664
0.00 mi 94% similar Same subdivision
3 bed 2 bath 1,627 sqft Built 1960
Raw Value $802,113
Adjusted Value $732,820

Adjusted -$7,446 for 29 sqft less living space and -$61,847 for being older. Net adjustment: -$69,293.

The Neighborhood

This home is valued 59.1% 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

outlier high
360 Properties
$319,256 Median Value
+4.3% YoY Change
5% Have Pool
24% Have Garage
This Home
$508,047
Median
$319,256

This home is +59.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,730 across all districts. With a homestead exemption claimed, that drops to $7,390 — saving $1,340 per year. That's $616 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%$4,333
Round RockCity0.3720%$1,805
Williamson CountyCounty0.3694%$1,792
Austin Community Collegespecial0.1034%$502
Williamson County FM/RdCounty0.0443%$215
Upper Brushy Creek WCIDWater0.0170%$82
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,730

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $306,865 would pay approximately $1,915 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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