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307 BLACK ST N, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

2 bed2 bath1,750 sqftBuilt 1940

Property at a Glance

This home is estimated between $470,313 and $896,268, with a best estimate of $592,542. 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

$470,313 $896,268
Best Estimate
$592,542
WCAD Value
$417,021
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 $470,313 and $896,268. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

302 BROWN ST N, ROUND ROCK, TX 78664
0.00 mi 98% similar Same subdivision
3 bed 2 bath 1,627 sqft Built 1960
Raw Value $802,113
Adjusted Value $896,268

Adjusted +$31,582 for 123 sqft more living space and -$61,847 for being older and +$124,420 for having a garage. Net adjustment: +$94,155.

605 LEWIS ST N, ROUND ROCK, TX 78664
0.00 mi 96% similar Same subdivision
3 bed 1 bath 1,598 sqft Built 1940
Raw Value $508,047
Adjusted Value $671,495

Adjusted +$39,028 for 152 sqft more living space and +$124,420 for having a garage. Net adjustment: +$163,448.

611 LEWIS ST N, ROUND ROCK, TX 78664
0.00 mi 93% similar Same subdivision
2 bed 1 bath 1,138 sqft Built 1940
Raw Value $310,984
Adjusted Value $592,542

Adjusted +$157,138 for 612 sqft more living space and +$124,420 for having a garage. Net adjustment: +$281,558.

404 GEORGETOWN ST N, ROUND ROCK, TX 78664
0.00 mi 91% similar Same subdivision
1 bed 1 bath 1,386 sqft Built 1940
Raw Value $376,852
Adjusted Value $470,313

Adjusted +$93,461 for 364 sqft more living space. Net adjustment: +$93,461.

204 STONE ST N, ROUND ROCK, TX 78664
0.00 mi 90% similar Same subdivision
3 bed 2 bath 2,140 sqft Built 1960
Raw Value $686,434
Adjusted Value $524,450

Adjusted -$100,137 for 390 sqft less living space and -$61,847 for being older. Net adjustment: -$161,984.

The Neighborhood

This home is valued 30.6% 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
$417,021
Median
$319,256

This home is +30.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $7,503 across all districts. With a homestead exemption claimed, that drops to $6,176 — saving $1,327 per year. That's $515 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%$3,724
Round RockCity0.3720%$1,551
Williamson CountyCounty0.3694%$1,541
Austin Community Collegespecial0.1034%$431
Williamson County FM/RdCounty0.0443%$185
Upper Brushy Creek WCIDWater0.0170%$71
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$7,503

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $592,542 would pay approximately $3,699 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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