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511 DENNIS DR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed1 bath1,433 sqftBuilt 1975

Property at a Glance

This home is estimated between $254,836 and $321,290, with a best estimate of $279,388. That places the property below the R462475H - Egger Acres median of $353,946, in a neighborhood that declined 4.4% over the past year.

Estimated Value Range

$254,836 $321,290
Best Estimate
$279,388
WCAD Value
$304,793
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $254,836 and $321,290. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3 bed 1 bath 1,667 sqft Built 1975
Raw Value $341,610
Adjusted Value $290,757

Adjusted -$50,853 for 234 sqft less living space. Net adjustment: -$50,853.

516 VIRGINIA DR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,447 sqft Built 1970
Raw Value $326,418
Adjusted Value $321,290

Adjusted -$3,042 for 14 sqft less living space and -$2,086 for being older. Net adjustment: -$5,128.

1703 GREYSON DR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,670 sqft Built 1978
Raw Value $319,246
Adjusted Value $268,993

Adjusted -$51,505 for 237 sqft less living space and +$1,252 for being newer. Net adjustment: -$50,253.

608 KAROLYN DR, ROUND ROCK, TX 78664
0.00 mi 98% similar Same subdivision
3 bed 2 bath 2,006 sqft Built 1975
Raw Value $379,361
Adjusted Value $254,836

Adjusted -$124,525 for 573 sqft less living space. Net adjustment: -$124,525.

602 VIRGINIA DR, ROUND ROCK, TX 78664
0.00 mi 97% similar Same subdivision
3 bed 2 bath 1,884 sqft Built 1970
Raw Value $379,486
Adjusted Value $279,388

Adjusted -$98,012 for 451 sqft less living space and -$2,086 for being older. Net adjustment: -$100,098.

The Neighborhood

This home is valued 13.9% below the R462475H - Egger Acres median of $353,946. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 4.4% over the past year.

R462475H - Egger Acres

typical
340 Properties
$353,946 Median Value
-4.4% YoY Change
6% Have Pool
87% Have Garage
This Home
$304,793
Median
$353,946

This home is -13.9% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,484 across all districts. With a homestead exemption claimed, that drops to $4,177 — saving $1,307 per year. That's $348 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%$2,722
Round RockCity0.3720%$1,134
Williamson CountyCounty0.3694%$1,126
Austin Community Collegespecial0.1034%$315
Williamson County FM/RdCounty0.0443%$135
Upper Brushy Creek WCIDWater0.0170%$52
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,484

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $279,388 would pay approximately $1,744 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 4/19/2026.

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