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

515 HEATHER DR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath2,243 sqftBuilt 1977

Property at a Glance

This home is estimated between $405,806 and $546,172, with a best estimate of $475,680. 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

$405,806 $546,172
Best Estimate
$475,680
WCAD Value
$478,601
Medium Confidence

Based on 5 comparable properties(3 in the same subdivision)

Based on 5 comparable properties (3 in the same subdivision, 2 nearby), the estimated range is $405,806 and $546,172. More comparables in the same subdivision would strengthen this estimate.

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 $475,680

Adjusted +$117,353 for 540 sqft more living space and -$834 for being older. Net adjustment: +$116,519.

515 OAK DR W, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,621 sqft Built 1971
Raw Value $417,355
Adjusted Value $546,172

Adjusted +$135,174 for 622 sqft more living space and -$2,503 for being older and -$3,854 for no pool. Net adjustment: +$128,817.

4 bed 2 bath 2,253 sqft Built 1994
Raw Value $404,415
Adjusted Value $409,334

Adjusted -$2,173 for 10 sqft less living space and +$7,092 for being newer. Net adjustment: +$4,919.

4 bed 2 bath 2,253 sqft Built 1994
Raw Value $400,887
Adjusted Value $405,806

Adjusted -$2,173 for 10 sqft less living space and +$7,092 for being newer. Net adjustment: +$4,919.

515 KAROLYN DR, ROUND ROCK, TX 78664
0.00 mi 96% similar Same subdivision
3 bed 2 bath 1,424 sqft Built 1971
Raw Value $320,194
Adjusted Value $495,677

Adjusted +$177,986 for 819 sqft more living space and -$2,503 for being older. Net adjustment: +$175,483.

The Neighborhood

This home is valued 35.2% 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
$478,601
Median
$353,946

This home is +35.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $8,611 across all districts. With a homestead exemption claimed, that drops to $7,273 — saving $1,338 per year. That's $606 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%$4,274
Round RockCity0.3720%$1,780
Williamson CountyCounty0.3694%$1,768
Austin Community Collegespecial0.1034%$495
Williamson County FM/RdCounty0.0443%$212
Upper Brushy Creek WCIDWater0.0170%$81
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,611

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $475,680 would pay approximately $2,969 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