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3802 SPYGLASS CV, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed2 bath1,634 sqftBuilt 2004

Property at a Glance

This home is estimated between $291,375 and $691,588, with a best estimate of $447,029. That places the property below 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

$291,375 $691,588
Best Estimate
$447,029
WCAD Value
$474,694
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 $291,375 and $691,588. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3800 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,180 sqft Built 2004
Raw Value $447,589
Adjusted Value $291,375

Adjusted -$156,214 for 546 sqft less living space. Net adjustment: -$156,214.

3804 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2,013 sqft Built 2004
Raw Value $525,320
Adjusted Value $416,886

Adjusted -$108,434 for 379 sqft less living space. Net adjustment: -$108,434.

3809 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,146 sqft Built 2005
Raw Value $595,480
Adjusted Value $447,029

Adjusted -$146,486 for 512 sqft less living space and -$1,965 for being older. Net adjustment: -$148,451.

3806 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,622 sqft Built 2005
Raw Value $506,486
Adjusted Value $507,954

Adjusted +$3,433 for 12 sqft more living space and -$1,965 for being older. Net adjustment: +$1,468.

3808 SPYGLASS CV, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,217 sqft Built 2002
Raw Value $568,352
Adjusted Value $691,588

Adjusted +$119,306 for 417 sqft more living space and +$3,930 for being newer. Net adjustment: +$123,236.

The Neighborhood

This home is valued 7.7% below the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276. That positions it competitively for buyers comparing within the neighborhood. 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
$474,694
Median
$514,276

This home is -7.7% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,541 across all districts. With a homestead exemption claimed, that drops to $7,203 — saving $1,338 per year. That's $600 per month a buyer should budget. The assessed value increased -1.8% vs the subdivision average of -8.7%. This above-average increase gives a protest opportunity score of 35 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$4,239
Round RockCity0.3720%$1,766
Williamson CountyCounty0.3694%$1,754
Austin Community Collegespecial0.1034%$491
Williamson County FM/RdCounty0.0443%$210
Upper Brushy Creek WCIDWater0.0170%$81
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,541
35 / 100

Some opportunity.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $447,029 would pay approximately $2,790 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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