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3827 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,386 sqftBuilt 2010

Property at a Glance

This home is estimated between $457,501 and $802,435, with a best estimate of $565,779. That places the property below the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673, in a neighborhood that declined 8.0% over the past year.

Estimated Value Range

$457,501 $802,435
Best Estimate
$565,779
WCAD Value
$698,179
High Confidence

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

Based on 5 comparable properties in L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP, this home's estimated market value is between $457,501 and $802,435. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3912 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,521 sqft Built 2008
Raw Value $603,157
Adjusted Value $565,779

Adjusted -$41,373 for 135 sqft less living space and +$3,995 for being newer. Net adjustment: -$37,378.

3917 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,205 sqft Built 2011
Raw Value $638,861
Adjusted Value $692,335

Adjusted +$55,471 for 181 sqft more living space and -$1,997 for being older. Net adjustment: +$53,474.

4009 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,003 sqft Built 2011
Raw Value $687,055
Adjusted Value $802,435

Adjusted +$117,377 for 383 sqft more living space and -$1,997 for being older. Net adjustment: +$115,380.

3929 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,517 sqft Built 2007
Raw Value $491,656
Adjusted Value $457,501

Adjusted -$40,147 for 131 sqft less living space and +$5,992 for being newer. Net adjustment: -$34,155.

3920 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,496 sqft Built 2011
Raw Value $498,039
Adjusted Value $462,330

Adjusted -$33,712 for 110 sqft less living space and -$1,997 for being older. Net adjustment: -$35,709.

The Neighborhood

This home is valued 11.9% above the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673. With 427 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.0% over the past year.

L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP

typical
427 Properties
$623,673 Median Value
-8.0% YoY Change
1% Have Pool
100% Have Garage
This Home
$698,179
Median
$623,673

This home is +11.9% above the subdivision median.

Tax Analysis

The estimated annual property tax is $13,915 across all districts. With a homestead exemption claimed, that drops to $12,265 — saving $1,650 per year. That's $1,022 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
Leander ISDSchool1.0869%$7,589
Round RockCity0.3720%$2,597
Williamson CountyCounty0.3694%$2,579
Austin Community Collegespecial0.1034%$722
Williamson County FM/RdCounty0.0443%$309
Upper Brushy Creek WCIDWater0.0170%$119
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$13,915

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $565,779 would pay approximately $3,532 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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