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3818 SEBASTIAN CV, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath2,500 sqftBuilt 2005

Property at a Glance

This home is estimated between $482,086 and $744,169, with a best estimate of $513,670. That places the property above the L498506D - VILLAGE AT MAYFIELD median of $510,992, in a neighborhood that declined 5.8% over the past year.

Estimated Value Range

$482,086 $744,169
Best Estimate
$513,670
WCAD Value
$486,730
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 $482,086 and $744,169. 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 $482,086

Adjusted +$13,661 for 49 sqft more living space and +$271 for being newer. Net adjustment: +$13,932.

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 $650,212

Adjusted +$176,195 for 632 sqft more living space. Net adjustment: +$176,195.

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 $486,741

Adjusted +$17,006 for 61 sqft more living space and +$271 for being newer. Net adjustment: +$17,277.

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 $744,169

Adjusted +$98,134 for 352 sqft more living space and -$271 for being older. Net adjustment: +$97,863.

3830 SEBASTIAN CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,322 sqft Built 2006
Raw Value $464,317
Adjusted Value $513,670

Adjusted +$49,624 for 178 sqft more living space and -$271 for being older. Net adjustment: +$49,353.

The Neighborhood

This home is valued 4.7% 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
$486,730
Median
$510,992

This home is -4.7% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,758 across all districts. With a homestead exemption claimed, that drops to $7,417 — saving $1,341 per year. That's $618 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%$4,347
Round RockCity0.3720%$1,811
Williamson CountyCounty0.3694%$1,798
Austin Community Collegespecial0.1034%$503
Williamson County FM/RdCounty0.0443%$216
Upper Brushy Creek WCIDWater0.0170%$83
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,758

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $513,670 would pay approximately $3,206 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.

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