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

505 WINDSOR RD, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,481 sqftBuilt 1978

Property at a Glance

This home is estimated between $260,355 and $294,537, with a best estimate of $287,207. That places the property below the R604482H - KENSINGTON / WINDY TERRACE 1985 AND OLDER median of $312,111, in a neighborhood that declined 9.7% over the past year.

Estimated Value Range

$260,355 $294,537
Best Estimate
$287,207
WCAD Value
$274,703
High Confidence

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

Based on 5 comparable properties in R604482H - KENSINGTON / WINDY TERRACE 1985 AND OLDER, this home's estimated market value is between $260,355 and $294,537. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

703 WINDSOR RD, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,668 sqft Built 1978
Raw Value $333,824
Adjusted Value $294,537

Adjusted -$39,287 for 187 sqft less living space. Net adjustment: -$39,287.

801 WINDSOR RD, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,488 sqft Built 1978
Raw Value $280,394
Adjusted Value $278,923

Adjusted -$1,471 for 7 sqft less living space. Net adjustment: -$1,471.

507 WINDSOR RD, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,521 sqft Built 1977
Raw Value $297,637
Adjusted Value $289,161

Adjusted -$8,404 for 40 sqft less living space and -$72 for being older. Net adjustment: -$8,476.

701 WINDSOR RD, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,570 sqft Built 1978
Raw Value $279,053
Adjusted Value $260,355

Adjusted -$18,698 for 89 sqft less living space. Net adjustment: -$18,698.

706 WINDSOR RD, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,683 sqft Built 1978
Raw Value $329,645
Adjusted Value $287,207

Adjusted -$42,438 for 202 sqft less living space. Net adjustment: -$42,438.

The Neighborhood

This home is valued 12.0% below the R604482H - KENSINGTON / WINDY TERRACE 1985 AND OLDER median of $312,111. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 9.7% over the past year.

R604482H - KENSINGTON / WINDY TERRACE 1985 AND OLDER

typical
459 Properties
$312,111 Median Value
-9.7% YoY Change
2% Have Pool
94% Have Garage
This Home
$274,703
Median
$312,111

This home is -12.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $4,943 across all districts. With a homestead exemption claimed, that drops to $3,642 — saving $1,301 per year. That's $304 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%$2,453
Round RockCity0.3720%$1,022
Williamson CountyCounty0.3694%$1,015
Austin Community Collegespecial0.1034%$284
Williamson County FM/RdCounty0.0443%$122
Upper Brushy Creek WCIDWater0.0170%$47
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$4,943

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $287,207 would pay approximately $1,793 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