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

511 SARA DR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,988 sqftBuilt 1975

Property at a Glance

This home is estimated between $375,449 and $441,903, with a best estimate of $400,001. 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

$375,449 $441,903
Best Estimate
$400,001
WCAD Value
$374,566
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 $375,449 and $441,903. 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 $375,449

Adjusted -$3,912 for 18 sqft less living space. Net adjustment: -$3,912.

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 $400,001

Adjusted +$22,601 for 104 sqft more living space and -$2,086 for being older. Net adjustment: +$20,515.

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 $441,903

Adjusted +$117,571 for 541 sqft more living space and -$2,086 for being older. Net adjustment: +$115,485.

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 $389,606

Adjusted +$69,108 for 318 sqft more living space and +$1,252 for being newer. Net adjustment: +$70,360.

3 bed 2 bath 1,830 sqft Built 1983
Raw Value $373,783
Adjusted Value $411,458

Adjusted +$34,337 for 158 sqft more living space and +$3,338 for being newer. Net adjustment: +$37,675.

The Neighborhood

This home is valued 5.8% 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

typical
340 Properties
$353,946 Median Value
-4.4% YoY Change
6% Have Pool
87% Have Garage
This Home
$374,566
Median
$353,946

This home is +5.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,739 across all districts. With a homestead exemption claimed, that drops to $5,420 — saving $1,319 per year. That's $452 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%$3,345
Round RockCity0.3720%$1,393
Williamson CountyCounty0.3694%$1,384
Austin Community Collegespecial0.1034%$387
Williamson County FM/RdCounty0.0443%$166
Upper Brushy Creek WCIDWater0.0170%$64
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,739

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $400,001 would pay approximately $2,497 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.

View full property details