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

3806 SEBASTIAN CV, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath2,355 sqftBuilt 2003

Property at a Glance

This home is estimated between $441,119 and $703,203, with a best estimate of $445,775. That places the property below the L498506D - VILLAGE AT MAYFIELD median of $510,992, in a neighborhood that declined 5.8% over the past year.

Estimated Value Range

$441,119 $703,203
Best Estimate
$445,775
WCAD Value
$470,182
High Confidence

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

Based on 5 comparable properties in L498506D - VILLAGE AT MAYFIELD, this home's estimated market value is between $441,119 and $703,203. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3815 SEBASTIAN CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2,451 sqft Built 2004
Raw Value $468,154
Adjusted Value $441,119

Adjusted -$26,764 for 96 sqft less living space and -$271 for being older. Net adjustment: -$27,035.

3803 SEBASTIAN CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,868 sqft Built 2005
Raw Value $474,017
Adjusted Value $609,246

Adjusted +$135,770 for 487 sqft more living space and -$541 for being older. Net adjustment: +$135,229.

3807 SEBASTIAN CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,439 sqft Built 2004
Raw Value $469,464
Adjusted Value $445,775

Adjusted -$23,418 for 84 sqft less living space and -$271 for being older. Net adjustment: -$23,689.

3810 SEBASTIAN CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,148 sqft Built 2006
Raw Value $646,306
Adjusted Value $703,203

Adjusted +$57,709 for 207 sqft more living space and -$812 for being older. Net adjustment: +$56,897.

3818 SEBASTIAN CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,500 sqft Built 2005
Raw Value $486,730
Adjusted Value $445,765

Adjusted -$40,424 for 145 sqft less living space and -$541 for being older. Net adjustment: -$40,965.

The Neighborhood

This home is valued 8.0% below the L498506D - VILLAGE AT MAYFIELD median of $510,992. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 5.8% over the past year.

L498506D - VILLAGE AT MAYFIELD

typical
696 Properties
$510,992 Median Value
-5.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$470,182
Median
$510,992

This home is -8.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,460 across all districts. With a homestead exemption claimed, that drops to $7,123 — saving $1,337 per year. That's $594 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%$4,199
Round RockCity0.3720%$1,749
Williamson CountyCounty0.3694%$1,737
Austin Community Collegespecial0.1034%$486
Williamson County FM/RdCounty0.0443%$208
Upper Brushy Creek WCIDWater0.0170%$80
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,460

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $445,775 would pay approximately $2,783 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