Beta Williamson County, TX only — data and coverage are limited during early access.

504 SARA DR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,642 sqftBuilt 1977

Property at a Glance

This home is estimated between $299,422 and $365,876, with a best estimate of $323,974. 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

$299,422 $365,876
Best Estimate
$323,974
WCAD Value
$338,833
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 $299,422 and $365,876. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

608 KAROLYN DR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,006 sqft Built 1975
Raw Value $379,361
Adjusted Value $299,422

Adjusted -$79,105 for 364 sqft less living space and -$834 for being older. Net adjustment: -$79,939.

602 VIRGINIA DR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,884 sqft Built 1970
Raw Value $379,486
Adjusted Value $323,974

Adjusted -$52,592 for 242 sqft less living space and -$2,920 for being older. Net adjustment: -$55,512.

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 $365,876

Adjusted +$42,378 for 195 sqft more living space and -$2,920 for being older. Net adjustment: +$39,458.

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 $313,578

Adjusted -$6,085 for 28 sqft less living space and +$417 for being newer. Net adjustment: -$5,668.

3 bed 2 bath 1,830 sqft Built 1983
Raw Value $373,783
Adjusted Value $335,430

Adjusted -$40,856 for 188 sqft less living space and +$2,503 for being newer. Net adjustment: -$38,353.

The Neighborhood

This home is valued 4.3% 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
$338,833
Median
$353,946

This home is -4.3% below the subdivision median.

Tax Analysis

The estimated annual property tax is $6,097 across all districts. With a homestead exemption claimed, that drops to $4,784 — saving $1,313 per year. That's $399 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%$3,026
Round RockCity0.3720%$1,260
Williamson CountyCounty0.3694%$1,252
Austin Community Collegespecial0.1034%$350
Williamson County FM/RdCounty0.0443%$150
Upper Brushy Creek WCIDWater0.0170%$58
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,097

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $323,974 would pay approximately $2,022 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.

View full property details