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

3901 VALLARTA LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath3,031 sqftBuilt 2004

Property at a Glance

This home is estimated between $490,708 and $616,197, with a best estimate of $564,481. 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

$490,708 $616,197
Best Estimate
$564,481
WCAD Value
$603,714
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 $490,708 and $616,197. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3905 VALLARTA LN, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
4 bed 2 bath 2,893 sqft Built 2006
Raw Value $578,265
Adjusted Value $616,197

Adjusted +$38,473 for 138 sqft more living space and -$541 for being older. Net adjustment: +$37,932.

3800 OCTAVIA LN, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
3 bed 2 bath 2,910 sqft Built 2004
Raw Value $526,074
Adjusted Value $559,807

Adjusted +$33,733 for 121 sqft more living space. Net adjustment: +$33,733.

3801 OCTAVIA LN, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
4 bed 2 bath 3,008 sqft Built 2004
Raw Value $558,069
Adjusted Value $564,481

Adjusted +$6,412 for 23 sqft more living space. Net adjustment: +$6,412.

3917 VALLARTA LN, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
4 bed 2 bath 2,852 sqft Built 2006
Raw Value $548,443
Adjusted Value $597,805

Adjusted +$49,903 for 179 sqft more living space and -$541 for being older. Net adjustment: +$49,362.

3921 VALLARTA LN, ROUND ROCK, TX 78681
0.03 mi 100% similar Same subdivision
3 bed 2 bath 3,449 sqft Built 2004
Raw Value $607,242
Adjusted Value $490,708

Adjusted -$116,534 for 418 sqft less living space. Net adjustment: -$116,534.

The Neighborhood

This home is valued 18.1% above the L498506D - VILLAGE AT MAYFIELD median of $510,992. With 696 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 5.8% over the past year.

L498506D - VILLAGE AT MAYFIELD

above average
696 Properties
$510,992 Median Value
-5.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$603,714
Median
$510,992

This home is +18.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,862 across all districts. With a homestead exemption claimed, that drops to $9,501 — saving $1,361 per year. That's $792 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%$5,392
Round RockCity0.3720%$2,246
Williamson CountyCounty0.3694%$2,230
Austin Community Collegespecial0.1034%$624
Williamson County FM/RdCounty0.0443%$268
Upper Brushy Creek WCIDWater0.0170%$103
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,862

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $564,481 would pay approximately $3,523 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