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

5817 ARBIA LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath1,806 sqftBuilt 2018

Property at a Glance

This home is estimated between $368,030 and $551,086, with a best estimate of $519,356. That places the property above the H121413C - SIENA median of $406,354, in a neighborhood that declined 5.4% over the past year.

Estimated Value Range

$368,030 $551,086
Best Estimate
$519,356
WCAD Value
$543,808
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 $368,030 and $551,086 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 1,851 sqft Built 2012
Raw Value $547,227
Adjusted Value $551,086

Adjusted -$9,513 for 45 sqft less living space and +$13,372 for being newer. Net adjustment: +$3,859.

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 $368,030

Adjusted -$17,124 for 81 sqft less living space and +$4,457 for being newer. Net adjustment: -$12,667.

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 $393,619

Adjusted +$58,772 for 278 sqft more living space. Net adjustment: +$58,772.

5 bed 3 bath 1,642 sqft Built 2025
Raw Value $500,285
Adjusted Value $519,356

Adjusted +$34,671 for 164 sqft more living space and -$15,600 for being older. Net adjustment: +$19,071.

4 bed 2 bath 1,881 sqft Built 2010
Raw Value $528,350
Adjusted Value $530,323

Adjusted -$15,856 for 75 sqft less living space and +$17,829 for being newer. Net adjustment: +$1,973.

The Neighborhood

This home is valued 33.8% above the H121413C - SIENA median of $406,354. With 1,611 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 5.4% over the past year.

H121413C - SIENA

above average
1,611 Properties
$406,354 Median Value
-5.4% YoY Change
1% Have Pool
100% Have Garage
This Home
$543,808
Median
$406,354

This home is +33.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,518 across all districts. With a homestead exemption claimed, that drops to $10,730 — saving $1,788 per year. That's $894 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%$6,554
Siena MUD #1MUD0.5250%$2,855
Williamson CountyCounty0.3694%$2,009
Williamson County ESD #3 - HuttoESD0.1000%$544
Williamson County FM/RdCounty0.0443%$241
EWC Higher Ed Centerspecial0.0409%$222
Upper Brushy Creek WCIDWater0.0170%$92
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.3018%$12,518

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $519,356 would pay approximately $3,242 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