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2920 CASTELLAN LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath2,027 sqftBuilt 2013

Property at a Glance

This home is estimated between $421,759 and $649,648, with a best estimate of $460,132. That places the property below the R491507D - PALOMA LAKE PLANTATION, GRANDHAVEN median of $499,831, in a neighborhood that declined 1.7% over the past year.

Estimated Value Range

$421,759 $649,648
Best Estimate
$460,132
WCAD Value
$554,559
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R491507D - PALOMA LAKE PLANTATION, GRANDHAVEN. The estimated range of $421,759 and $649,648 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,952 sqft Built 2012
Raw Value $439,401
Adjusted Value $460,132

Adjusted +$16,355 for 75 sqft more living space and +$4,376 for being newer. Net adjustment: +$20,731.

4 bed 2 bath 2,056 sqft Built 1993
Raw Value $368,069
Adjusted Value $449,261

Adjusted -$6,324 for 29 sqft less living space and +$87,516 for being newer. Net adjustment: +$81,192.

3 bed 2 bath 1,766 sqft Built 2013
Raw Value $364,842
Adjusted Value $421,759

Adjusted +$56,917 for 261 sqft more living space. Net adjustment: +$56,917.

4 bed 2 bath 2,040 sqft Built 1992
Raw Value $445,287
Adjusted Value $534,344

Adjusted -$2,835 for 13 sqft less living space and +$91,892 for being newer. Net adjustment: +$89,057.

4 bed 3 bath 2,893 sqft Built 2021
Raw Value $873,506
Adjusted Value $649,648

Adjusted -$188,851 for 866 sqft less living space and -$35,007 for being older. Net adjustment: -$223,858.

The Neighborhood

This home is valued 10.9% above the R491507D - PALOMA LAKE PLANTATION, GRANDHAVEN median of $499,831. With 695 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 1.7% over the past year.

R491507D - PALOMA LAKE PLANTATION, GRANDHAVEN

typical
695 Properties
$499,831 Median Value
-1.7% YoY Change
1% Have Pool
100% Have Garage
This Home
$554,559
Median
$499,831

This home is +10.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,535 across all districts. With a homestead exemption claimed, that drops to $9,182 — saving $1,353 per year. That's $765 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%$4,953
Paloma Lakes MUD #1MUD0.3725%$2,066
Williamson CountyCounty0.3694%$2,049
Austin Community Collegespecial0.1034%$573
Williamson County ESD #9 - Round RockESD0.0999%$554
Williamson County FM/RdCounty0.0443%$246
Upper Brushy Creek WCIDWater0.0170%$94
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8997%$10,535

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $460,132 would pay approximately $2,872 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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