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6217 MANTALCINO LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath1,692 sqftBuilt 2018

Property at a Glance

This home is estimated between $343,929 and $556,682, with a best estimate of $378,396. 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

$343,929 $556,682
Best Estimate
$378,396
WCAD Value
$408,633
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in H121413C - SIENA. The estimated range of $343,929 and $556,682 should be treated as a rough guide.

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 $343,929

Adjusted -$41,225 for 195 sqft less living space and +$4,457 for being newer. Net adjustment: -$36,768.

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 $369,518

Adjusted +$34,671 for 164 sqft more living space. Net adjustment: +$34,671.

4 bed 2 bath 1,881 sqft Built 2010
Raw Value $528,350
Adjusted Value $506,223

Adjusted -$39,956 for 189 sqft less living space and +$17,829 for being newer. Net adjustment: -$22,127.

4 bed 2 bath 2,028 sqft Built 2011
Raw Value $612,116
Adjusted Value $556,682

Adjusted -$71,034 for 336 sqft less living space and +$15,600 for being newer. Net adjustment: -$55,434.

3 bed 2 bath 1,649 sqft Built 2005
Raw Value $340,333
Adjusted Value $378,396

Adjusted +$9,091 for 43 sqft more living space and +$28,972 for being newer. Net adjustment: +$38,063.

The Neighborhood

This home is in line with the H121413C - SIENA median of $406,354. Note that values in this subdivision declined 5.4% over the past year.

H121413C - SIENA

typical
1,611 Properties
$406,354 Median Value
-5.4% YoY Change
1% Have Pool
100% Have Garage
This Home
$408,633
Median
$406,354

This home is +0.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $9,406 across all districts. With a homestead exemption claimed, that drops to $7,643 — saving $1,763 per year. That's $637 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%$4,925
Siena MUD #1MUD0.5250%$2,145
Williamson CountyCounty0.3694%$1,510
Williamson County ESD #3 - HuttoESD0.1000%$409
Williamson County FM/RdCounty0.0443%$181
EWC Higher Ed Centerspecial0.0409%$167
Upper Brushy Creek WCIDWater0.0170%$69
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$9,406

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $378,396 would pay approximately $2,362 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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