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3909 BLUE MONSTER CV, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath2,779 sqftBuilt 2002

Property at a Glance

This home is estimated between $566,703 and $710,837, with a best estimate of $569,701. That places the property above the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276, in a neighborhood that declined 8.7% over the past year.

Estimated Value Range

$566,703 $710,837
Best Estimate
$569,701
WCAD Value
$516,411
High Confidence

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

Based on 5 comparable properties in R550600D - Forest Creek Sec 15,16,19,31, this home's estimated market value is between $566,703 and $710,837. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3910 BLUE MONSTER CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,927 sqft Built 2002
Raw Value $467,074
Adjusted Value $710,837

Adjusted +$243,763 for 852 sqft more living space. Net adjustment: +$243,763.

3908 BLUE MONSTER CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,494 sqft Built 2002
Raw Value $485,163
Adjusted Value $566,703

Adjusted +$81,540 for 285 sqft more living space. Net adjustment: +$81,540.

3917 BLUE MONSTER CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,456 sqft Built 2001
Raw Value $475,242
Adjusted Value $569,619

Adjusted +$92,412 for 323 sqft more living space and +$1,965 for being newer. Net adjustment: +$94,377.

3914 BLUE MONSTER CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,536 sqft Built 2002
Raw Value $500,177
Adjusted Value $569,701

Adjusted +$69,524 for 243 sqft more living space. Net adjustment: +$69,524.

3920 BLUE MONSTER CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,126 sqft Built 2002
Raw Value $438,108
Adjusted Value $624,935

Adjusted +$186,827 for 653 sqft more living space. Net adjustment: +$186,827.

The Neighborhood

This home is in line with the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276. Note that values in this subdivision declined 8.7% over the past year.

R550600D - Forest Creek Sec 15,16,19,31

typical
274 Properties
$514,276 Median Value
-8.7% YoY Change
0% Have Pool
99% Have Garage
This Home
$516,411
Median
$514,276

This home is +0.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $9,292 across all districts. With a homestead exemption claimed, that drops to $7,946 — saving $1,346 per year. That's $662 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%$4,612
Round RockCity0.3720%$1,921
Williamson CountyCounty0.3694%$1,908
Austin Community Collegespecial0.1034%$534
Williamson County FM/RdCounty0.0443%$229
Upper Brushy Creek WCIDWater0.0170%$88
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$9,292

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $569,701 would pay approximately $3,556 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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