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6221 MANTALCINO LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,510 sqftBuilt 2019

Property at a Glance

This home is estimated between $307,682 and $501,514, with a best estimate of $333,271. That places the property below the H121413C - SIENA median of $406,354, in a neighborhood that declined 5.4% over the past year.

Estimated Value Range

$307,682 $501,514
Best Estimate
$333,271
WCAD Value
$314,537
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 $307,682 and $501,514. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

5715 ARBIA LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,887 sqft Built 2016
Raw Value $380,697
Adjusted Value $307,682

Adjusted -$79,701 for 377 sqft less living space and +$6,686 for being newer. Net adjustment: -$73,015.

6293 MANTALCINO LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 897 sqft Built 2018
Raw Value $367,277
Adjusted Value $499,100

Adjusted +$129,594 for 613 sqft more living space and +$2,229 for being newer. Net adjustment: +$131,823.

5810 LUCCA LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,528 sqft Built 2018
Raw Value $334,847
Adjusted Value $333,271

Adjusted -$3,805 for 18 sqft less living space and +$2,229 for being newer. Net adjustment: -$1,576.

3 bed 2 bath 1,288 sqft Built 2020
Raw Value $456,810
Adjusted Value $501,514

Adjusted +$46,933 for 222 sqft more living space and -$2,229 for being older. Net adjustment: +$44,704.

3 bed 2 bath 1,574 sqft Built 2007
Raw Value $318,980
Adjusted Value $332,193

Adjusted -$13,530 for 64 sqft less living space and +$26,743 for being newer. Net adjustment: +$13,213.

The Neighborhood

This home is valued 22.6% below the H121413C - SIENA median of $406,354. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 5.4% over the past year.

H121413C - SIENA

below average
1,611 Properties
$406,354 Median Value
-5.4% YoY Change
1% Have Pool
100% Have Garage
This Home
$314,537
Median
$406,354

This home is -22.6% below the subdivision median.

Tax Analysis

The estimated annual property tax is $7,240 across all districts. With a homestead exemption claimed, that drops to $5,495 — saving $1,745 per year. That's $458 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
Hutto ISDSchool1.2052%$3,791
Siena MUD #1MUD0.5250%$1,651
Williamson CountyCounty0.3694%$1,162
Williamson County ESD #3 - HuttoESD0.1000%$315
Williamson County FM/RdCounty0.0443%$139
EWC Higher Ed Centerspecial0.0409%$129
Upper Brushy Creek WCIDWater0.0170%$53
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$7,240

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $333,271 would pay approximately $2,080 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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