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515 OAK DR W, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,621 sqftBuilt 1971

Property at a Glance

This home is estimated between $346,864 and $458,278, with a best estimate of $366,860. That places the property above the R462475H - Egger Acres median of $353,946, in a neighborhood that declined 4.4% over the past year.

Estimated Value Range

$346,864 $458,278
Best Estimate
$366,860
WCAD Value
$417,355
High Confidence

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

Based on 5 comparable properties in R462475H - Egger Acres, this home's estimated market value is between $346,864 and $458,278. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

515 VIRGINIA DR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,703 sqft Built 1975
Raw Value $359,161
Adjusted Value $346,864

Adjusted -$17,820 for 82 sqft less living space and +$1,669 for being newer and +$3,854 for having a pool. Net adjustment: -$12,297.

515 HEATHER DR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,243 sqft Built 1977
Raw Value $478,601
Adjusted Value $349,784

Adjusted -$135,174 for 622 sqft less living space and +$2,503 for being newer and +$3,854 for having a pool. Net adjustment: -$128,817.

515 KAROLYN DR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,424 sqft Built 1971
Raw Value $320,194
Adjusted Value $366,860

Adjusted +$42,812 for 197 sqft more living space and +$3,854 for having a pool. Net adjustment: +$46,666.

506 PALM VALLEY BLVD E, ROUND ROCK, TX 78664
0.00 mi 93% similar Same subdivision
3 bed 2 bath 1,764 sqft Built 1972
Raw Value $485,084
Adjusted Value $458,278

Adjusted -$31,077 for 143 sqft less living space and +$417 for being newer and +$3,854 for having a pool. Net adjustment: -$26,806.

518 PALM VALLEY BLVD E, ROUND ROCK, TX 78664
0.00 mi 90% similar Same subdivision
3 bed 2 bath 1,920 sqft Built 1972
Raw Value $488,875
Adjusted Value $428,167

Adjusted -$64,979 for 299 sqft less living space and +$417 for being newer and +$3,854 for having a pool. Net adjustment: -$60,708.

The Neighborhood

This home is valued 17.9% above the R462475H - Egger Acres median of $353,946. With 340 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.4% over the past year.

R462475H - Egger Acres

above average
340 Properties
$353,946 Median Value
-4.4% YoY Change
6% Have Pool
87% Have Garage
This Home
$417,355
Median
$353,946

This home is +17.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $7,509 across all districts. With a homestead exemption claimed, that drops to $6,182 — 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%$3,727
Round RockCity0.3720%$1,553
Williamson CountyCounty0.3694%$1,542
Austin Community Collegespecial0.1034%$432
Williamson County FM/RdCounty0.0443%$185
Upper Brushy Creek WCIDWater0.0170%$71
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$7,509

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $366,860 would pay approximately $2,290 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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